DIRECTIONAL SPOOL VALVE 4WEH 16 T7X/6EG24NTK4
Manufacturer: Bosch Rexroth
Material #: R978915054
Model : 4WEH 16 T7X/6EG24NTK4
$1,422.00 USD
More are expected on February 2, 2026
Note: Sales tax, shipping, and applicable tariffs will be calculated at checkout.| Qty | Price | Savings |
|---|---|---|
| 5-24 | $1,386.45 USD | $35.55 USD |
| 25+ | $1,350.90 USD | $71.10 USD |
Status: This product is temporarily out of stock.
Qty: Delivered as early as February 2, 2026 when ordered in
This product is eligible for factory repair.
Size 16, symbol T, electrical with solenoid, 24 V DC
Industrial hydraulic valve in a high performance range. Reliable switching of the oil flow direction according to hydraulic symbol.
Unpacked Weight: 8.900 kg
Types of actuation (internal or external pilot control): Electro-hydraulic (type WEH) For subplate mounting Porting pattern according toISO 4401 4/3-, 4/2- or 3/2-way version Spring or pressure centering, spring end position or hydraulic end position Wet-pin DC or AC solenoids, optional Electrical connection as individual or central connection Optional versions:
- Manual override
- Switching time adjustment
- Preload valve in channel P of the main valve
- Stroke setting and/or spool position monitoring
Directional valves type WEH…
The valve type WEH is a directional spool valve with electro-hydraulic actuation. It controls the start, stop and direction of a flow. The directional valve basically consists of the main valve with housing (1), the main control spool (2), one or two return springs (3.1) and (3.2), as well as the pilot control valve (4) with one or two solenoids "a" (5.1) and/or "b" (5.2). The main control spool (2) in the main valve is held in the zero or initial position by the springs or by means of pressurization. In the initial position, the two spring chambers (6) and (8) are connected with the tank in a depressurized form via the pilot control valve (4). Via the control line (7), the pilot control valve is supplied with pilot oil. Supply can be implemented internally or externally (externally via port X). Upon actuation of the pilot control valve, e.g. solenoid "a", the pilot control spool (10) is moved to the left and thus, the spring chamber (8) is pressurized with pilot pressure. The spring chamber (6) remains depressurized. The pilot pressure acts on the left side of the main control spool (2) and moves it against the spring (3.1). This connects port P with B and A with T in the main valve. On switching off of solenoid, the pilot control spool (10) returns to its initial position (except impulse spool). The spring chamber (8) is unloaded to the tank. The pilot oil return is implemented internally (via channel T) or externally (via channel Y). An optional manual override (9) allows for moving of the pilot control spool (10) without solenoid energization.
Notices:
The return springs (3.1) and (3.2) in the spring chambers (6) and (8) hold the main control spool (2) in central position without pilot pressure even with, for example, vertical valve positioning.
Due to the design principle, internal leakage is inherent to the valves, which may increase over the life cycle.
4/3 directional valve with pressure centering of the main control spool, type WEH…H
The main control spool (2) in the main valve is kept in the zero position by pressurization of the two front faces. One centering bush (12) rests on the housing and fixes the control spool position. By pressure relief of one front face, the main control spool (2) is moved to the switching position. The unloaded control spool face displaces the returning pilot oil into channel Y (external) via the pilot control valve.
Notes:
The springs (3.1) and (3.2) do not have a return function in this version. They hold the main control spool (2) in central position in the depressurized condition and with horizontal installation.
Pilot oil supply (schematic illustration)
NG10
Pilot oil supply (schematic illustration)
NG16
Pilot oil supply (schematic illustration)
NG25 („W.H 22“)
Pilot oil supply (schematic illustration)
NG25 („W.H 25“)
Pilot oil supply (schematic illustration)
Size 32
|
Pilot oil supply |
Pilot oil return |
||
|
External |
2 closed |
External |
1 closed |
|
Internal |
2 open |
Internal |
1 open |
|
1 |
Plug screw M6 according to DIN 906, wrench size 3 - Pilot oil return |
|
2 |
Plug screw M6 according to DIN 906, wrench size 3 - Pilot oil supply |
|
3 |
Plug screw M12 x 1.5 according DIN 906, wrench size 6 |
Type WEH...
The pilot oil supply is implemented externally - via channel X - from a separate pressure supply.
The pilot oil return is implemented externally - via the Y channel - into the tank.
Type WEH…E…
The pilot oil supply is implemented internally from channel P of the main valve. (see Technical data)
The pilot oil return is implemented externally - via channel Y - into the tank. In the subplate, port X is closed.
Type WEH...ET...
The pilot oil supply is implemented internally from channel P of the main valve.
The pilot oil return is implemented internally via the channel T - into the tank. In the subplate, ports X and Y are closed.
Type WEH...T...
The pilot oil supply is implemented externally - via channel X - from a separate pressure supply.
The pilot oil return is implemented internally - via the channel T - into the tank. In the subplate, port Y is closed.
Throttle insert
Use of the throttle insert (5) is necessary if the pilot oil supply in channel P of the pilot control valve is to be limited (see below). The throttle insert (5) is inserted in channel P of the pilot control valve.
Notices:
The modification of the pilot oil supply may only be performed by authorized specialists or at the factory!
Pilot oil supply X or return Y external: The maximum admissible operating parameters of the pilot control valve must be observed (see data sheet 23178)! Maximum pilot pressure: please observe the Technical data! Pilot oil supply internal (version "ET" and "E"): Minimum pilot pressure: please observe the Technical data! In order to prevent inadmissibly high pressure peaks, a "B10" throttleinsert has to be provided in port P of the pilot control valve. In connection with version "H", the pressure reducing valve "D3" (see switching time adjustment) is also required.|
3 |
Pilot control valve |
|
4 |
Main valve |
|
5 |
Throttle insert |
general
|
Size |
10 | 16 | 25 (WEH22) | 25 (WEH25) | 32 | ||
|
Weight (approx.) |
Valve with one solenoid |
kg |
6.4 | 8.5 | 11.5 | 17.6 | |
|
Valve with two solenoids, spring-centered |
kg |
6.8 | 8.9 | 11.9 | 19 | 41 | |
|
Valve with two solenoids, pressure-centered |
kg |
6.8 | 8.9 | 11.9 | 19 | 41 | |
|
Switching time adjustment "S" and "S2" |
kg |
0.8 | |||||
|
Pressure reducing valve "D3" |
kg |
0.4 | |||||
|
Installation position |
Any; horizontal with valves with hydraulic control spool return "H" and symbol A, B, C, D, K, Z, Y. With suspended installation, higher sensitivity to contamination – horizontal is recommended. | ||||||
|
Ambient temperature range |
Standard version |
°C |
-20 … +70 | ||||
|
Storage temperature range |
°C |
+5 … +40 | |||||
|
Surface protection |
Valve body |
Coating, layer thickness max. 100 μm | |||||
|
MTTFD values according to EN ISO 13849 |
Years |
100 | |||||
hydraulic
|
Size |
10 | 16 | 25 (WEH22) | 25 (WEH25) | 32 | |||
|
Maximum operating pressure |
Port P |
bar |
280 | |||||
|
Anschluss A |
bar |
280 | ||||||
|
Port B |
bar |
280 | ||||||
|
Port T |
External pilot oil return Y |
bar |
280 | 250 | ||||
|
Internal pilot oil return Y (with direct voltage) 1) |
bar |
210 | ||||||
|
Internal pilot oil return Y (with alternating voltage) 1) |
bar |
160 | ||||||
|
Port Y |
Pilot oil return, external (with direct voltage) |
bar |
210 | |||||
|
Pilot oil return, external (with alternating voltage) |
bar |
160 | ||||||
|
Hydraulic fluid |
see table | |||||||
|
Hydraulic fluid temperature range |
NBR seals 2) |
°C |
-20 … +80 | |||||
|
FKM seals 2) |
°C |
-15 … +80 | ||||||
|
HFC hydraulic fluid |
°C |
-20 … +50 | ||||||
|
Viscosity range |
mm²/s |
2.8 … 500 | ||||||
|
Maximum admissible degree of contamination of the hydraulic fluid 3) |
Class 20/18/15 according to ISO 4406 (c) | |||||||
|
Maximum pilot pressure 4) |
bar |
250 | 210 | 250 | ||||
|
Minimum pilot pressure |
Pilot oil supply X external or internal (with symbols D, K, E, J, L, M, Q, R, U, W) |
3-spool position valve, spring-centered |
bar |
12 | 14 | 10.5 | 13 | 8.5 |
|
3-spool position valve, pressure-centered |
bar |
- | 14 | - | 18 | 8.5 | ||
|
2-spool position valve, spring end position |
bar |
10 | 14 | 11 | 13 | 10 | ||
|
2-spool position valve, hydraulic end position |
bar |
7 | 14 | 8 | 5 | |||
|
Internal pilot oil supply X (with symbols C, F, G, H, P, T, V, Z, S) 6) |
bar |
7.5 5) | 4.5 7) | |||||
|
Pilot volume for switching process |
3-spool position valve, spring-centered |
cm³ |
2.04 | 5.72 | 7.64 | 14.2 | 29.4 | |
|
2-spool position valve |
cm³ |
4.08 | 11.45 | 15.28 | 28.4 | 58.8 | ||
|
3-spool position valve, pressure-centered |
from zero position in switching position “a” |
cm³ |
- | 2.83 | - | 7.15 | 14.4 | |
|
from switching position “a” in zero position |
cm³ |
- | 2.9 | - | 7 | 15.1 | ||
|
from zero position in switching position “b” |
cm³ |
- | 5.72 | - | 14.15 | 29.4 | ||
|
from switching position “b” in zero position |
cm³ |
- | 2.83 | - | 5.73 | 14.4 | ||
|
Pilot flow for shortest switching time, approx. |
l/min |
35 | 45 | |||||
| 1) | As a 3-spool position valve, pressure-centered only possible if ppilot ≥ 2 x ptank + ppilot min |
| 2) | If type WH is used in potentially explosion-proof areas, see data sheet 07011. |
| 3) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
| 4) | Internal pilot oil supply:- With a higher pilot pressure, use of a pressure reducing valve "D3" is required (if it is not used pilot pressure = operating pressure at the port).- In connection with version "H", the pressure reducing valve "D3" is also required. |
| 5) | For symbols C, F, G, H, P, T, V, Z, an internal pilot oil supply is only possible if the flow from P to T in the central position (for 3-spool position valve) or while crossing the central position (for2-spool position valve) is so large that the pressure differential of P to T reaches a value of at least 7,5 bar and the pilot oilreturn Y is implemented externally. |
| 6) | Symbol S only for NG16 |
| 7) | For symbols C, F, G, J, H, P, T, V, Z, S 5) – by means of preload valve (not NG10) or correspondingly high flow. (Determination ofthe required flow, see "Preload valve" characteristic curves.) For NG10, a check valve with a cracking pressure of 7,5 bar is to be provided in the return line to the tank.The pilot oil return Y must be implemented externally. |
Free flow cross-sections in zero position with spools Q, V and W
|
Size |
10 | 16 | 25 (WEH22) | 25 (WEH25) | 32 | ||
|
Spool Q |
A – T; B – T |
mm² |
13 | 32 | 78 | 83 | 78 |
|
Spool V |
P – A |
mm² |
13 | 32 | 73 | 83 | 73 |
|
A – T; B – T |
mm² |
13 | 32 | 84 | 83 | 84 | |
|
Spool W |
A – T; B – T |
mm² |
2.4 | 6 | 10 | 14 | 20 |
|
Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
Data sheet |
|
|
Mineral oil |
HL, HLP, HLPD, HVLP, HVLPD |
NBR, FKM |
DIN 51524 |
90220 |
|
|
Bio-degradable |
Insoluble in water |
HETG |
FKM |
ISO 15380 |
90221 |
|
HEES |
FKM |
||||
|
Soluble in water |
HEPG |
FKM |
ISO 15380 |
||
|
Flame-resistant |
Water-free |
HFDU (glycol base) |
FKM |
ISO 12922 |
90222 |
|
HFDU (ester base) |
FKM |
||||
|
HFDR |
FKM |
||||
Important notice on hydraulic fluids:
For more information and data on the use of other hydraulic fluids, please refer to the data sheets above or contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum solenoid surface temperature. Flame-resistant – containing water: Maximum pressure differential per control edge 50 bar Pressure pre-loading at the tank port >20% of the pressure differential, otherwise increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 ... 100% Bio-degradable and flame-resistant: If these hydraulic fluids are used, small amounts of dissolved zinc may get into the hydraulic system (700 mg zinc per pole tube).|
Switching times |
||||||
|
Pilot pressure |
bar |
70 |
210 |
250 |
Spring |
|
|
ON |
OFF |
|||||
|
NG10 |
Without throttle insert |
ms |
40 ... 60 |
– |
40 ... 60 |
20 ... 30 |
|
With throttle insert |
ms |
60 ... 90 |
– |
50 ... 70 |
20 ... 30 |
|
|
NG16 |
Without throttle insert |
ms |
50 ... 80 |
– |
40 ... 60 |
50 ... 80 |
|
With throttle insert |
ms |
110 ... 130 |
– |
80 ... 100 |
50 ... 80 |
|
|
NG25 (WEH 22) |
Without throttle insert |
ms |
40 ... 70 |
40 ... 60 |
– |
50 ... 70 |
|
With throttle insert |
ms |
140 ... 160 |
80 ... 110 |
– |
50 ... 70 |
|
|
NG25 (WEH 25) |
Without throttle insert |
ms |
70 ... 100 |
– |
50 ... 70 |
100 ... 130 |
|
With throttle insert |
ms |
200 ... 250 |
– |
120 ... 150 |
100 ... 130 |
|
|
NG32 |
Without throttle insert |
ms |
80 ... 130 |
– |
70 ... 100 |
140 ... 160 |
|
With throttle insert |
ms |
420 ... 560 |
– |
230 ... 350 |
140 ... 160 |
|
Notices!
Switching times = Contacting at the pilot control valve until start of opening of the control edge in the main valve and change in the control spool stroke by 95%) The switching times are measured according to ISO 6403 with HLP46, ϑOil = 40 °C ±5 °C). With different oil temperatures, variations are possible! The switching times were determined using DC solenoids. They decrease by approx. 20 ms if AC solenoids are used. The shut-off of the solenoids creates voltage peaks, which can be reduced by the use of suitable diodes. The switching times increase by approx. 30 ms if the pressure reducing valve "D3" is used. The switching times have been determined under ideal conditions and may differ in the system, depending on the application conditions.Inductive position switch type QM: electrical connection
The electric connection is realized via a 4-pole mating connector (separate order) with connection thread M12 x 1.
electrical
|
Connection voltage (DC voltage) |
V |
24 | ||
|
Voltage tolerance (connection voltage) |
+30 %/-15 % | |||
|
Admissible residual ripple |
% |
≤ 10 | ||
|
Max. load capacity |
mA |
400 | ||
|
Switching outputs 
|
PNP transistor outputs, load between switching outputs and GND | |||
|
Pinout 
|
1 |
V |
24 | |
|
2, 4 |
Switching output |
mA |
400 | |
|
3 |
Earthing (GND) |
V |
0 | |
For applications outside these parameters, please consult us!
(measured with HLP46, ϑOil = 40 °C ±5 °C)
NG10
Δp-qV characteristic curves
Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)
NG10
|
2-spool position valve – qV maxin l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring end position in the main valve1) (with ppilot min = 12 bar) |
|||||
|
C, D, K, Y, Z |
160 |
160 |
160 |
160 |
160 |
|
X external – hydraulic end position in the main valve |
|||||
|
HC, HD, HK, HZ, HY |
160 |
160 |
160 |
160 |
160 |
| 1) | If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails! |
NG10
|
3-spool position valves – qV max in l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring-centered |
|||||
|
E, J, L, M, Q, U, V, W, R |
160 |
160 |
160 |
160 |
160 |
|
F, P |
160 |
120 |
100 |
90 |
90 |
|
G, T |
160 |
160 |
160 |
130 |
120 |
|
H |
160 |
160 |
120 |
110 |
100 |
(measured with HLP46, ϑOil = 40 °C ±5 °C)
NG16
Δp-qV characteristic curves
|
Symbol |
Spool position |
Zero position |
|||||
|
P –A |
P – B |
A – T |
B – T |
P – T |
A – T |
B – T |
|
|
D, E, Y |
1 |
1 |
3 |
3 |
|||
|
F |
1 |
2 |
5 |
5 |
4 |
3 |
– |
|
G |
4 |
1 |
5 |
5 |
7 |
– |
– |
|
C, H |
1 |
1 |
5 |
6 |
2 |
4 |
4 |
|
K, J |
2 |
2 |
6 |
6 |
– |
3 |
– |
|
L |
2 |
2 |
5 |
4 |
– |
3 |
– |
|
M |
1 |
1 |
3 |
4 |
|||
|
P |
2 |
1 |
3 |
6 |
5 |
– |
– |
|
Q |
1 |
1 |
6 |
6 |
|||
|
R |
2 |
4 |
7 |
– |
|||
|
S |
3 |
3 |
3 |
– |
9 |
– |
– |
|
T |
4 |
1 |
5 |
5 |
7 |
– |
– |
|
U |
2 |
2 |
3 |
4 |
6 |
||
|
V, Z |
1 |
1 |
6 |
6 |
10 |
8 |
8 |
|
W |
1 |
1 |
3 |
4 |
|||
Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)
NG16
|
2-spool position valve – qV maxin l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring end position in the main valve1) (with ppilot min = 12 bar) |
|||||
|
C, D, K, Y, Z |
300 |
300 |
300 |
300 |
300 |
|
X external – spring end position in the main valve |
|||||
|
C |
300 |
300 |
300 |
300 |
300 |
|
D, Y |
300 |
270 |
260 |
250 |
230 |
|
K |
300 |
250 |
240 |
230 |
210 |
|
Z |
300 |
260 |
190 |
180 |
160 |
|
X external – hydraulic end position in the main valve |
|||||
|
HC, HD, HK, HZ, HY |
300 |
300 |
300 |
300 |
300 |
| 1) | If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails! |
NG16
|
3-spool position valves – qV max in l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring-centered |
|||||
|
E, H, J, L, M, Q, U, W, R |
300 |
300 |
300 |
300 |
300 |
|
F, P |
300 |
250 |
180 |
170 |
150 |
|
G, T |
300 |
300 |
240 |
210 |
190 |
|
S |
300 |
300 |
300 |
250 |
220 |
|
V |
300 |
250 |
210 |
200 |
180 |
|
X external – pressure-centered (at minimum pilot pressure of 16 bar) |
|||||
|
all 1) |
300 |
300 |
300 |
300 |
300 |
| 1) | With symbol V, the pilot control valve is not required for flows >160 l/min. |
(measured with HLP46, ϑOil = 40 °C ±5 °C)
NG25 (type W.H 22)
Δp-qV characteristic curves
|
Symbol |
Spool position |
Symbol |
Zero position |
||||||
|
P – A |
P – B |
A – T |
B – T |
B – A |
A – T |
B – T |
P – T |
||
|
E, D |
2 |
2 |
3 |
5 |
– |
F |
2 |
– |
4 |
|
J, Q, K |
2 |
2 |
4 |
6 |
– |
G, T |
– |
– |
9 |
|
M, W |
1 |
1 |
3 |
5 |
– |
H |
– |
– |
3 |
|
H, V, C, Z |
1 |
1 |
4 |
6 |
– |
L |
7 |
– |
– |
|
F |
1 |
2 |
4 |
5 |
– |
U |
– |
6 |
– |
|
G |
3 |
4 |
5 |
6 |
– |
J |
8 |
8 |
– |
|
R |
1 |
2 |
2 |
– |
– |
P |
– |
4 |
6 |
|
L |
2 |
2 |
4 |
5 |
– |
V, Z |
– |
– |
8 |
|
U |
2 |
2 |
2 |
6 |
– |
||||
|
P |
2 |
2 |
2 |
7 |
– |
||||
|
T |
4 |
4 |
5 |
6 |
– |
||||
Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)
NG25 (type W.H 22)
|
2-spool position valve – qV maxin l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring end position in the main valve (with ppilot min = 11 bar / 14 bar) |
|||||
|
C, D, K, Y, Z |
450 |
450 |
450 |
450 |
450 |
|
X external – spring end position in the main valve 1) |
|||||
|
C |
450 |
450 |
320 |
250 |
200 |
|
D, Y |
450 |
450 |
450 |
400 |
320 |
|
K |
450 |
215 |
150 |
120 |
100 |
|
Z |
350 |
300 |
290 |
260 |
160 |
|
X external – hydraulic end position in the main valve |
|||||
|
HC, HD, HK, HZ, HY |
450 |
450 |
450 |
450 |
450 |
|
HC./O…, HD./O…, HK./O…, HZ./O… |
450 |
450 |
450 |
450 |
450 |
|
HC./OF…, HD./OF…, HK./OF…, HZ./OF… |
450 |
450 |
450 |
450 |
450 |
| 1) | If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails! |
NG25 (type W.H 22)
|
3-spool position valves – qV max in l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring-centered |
|||||
|
E, J, L, M, Q, U, W, R |
450 |
450 |
450 |
450 |
450 |
|
H |
450 |
450 |
300 |
260 |
230 |
|
G |
400 |
350 |
250 |
200 |
180 |
|
F |
450 |
270 |
175 |
130 |
110 |
|
V |
450 |
300 |
240 |
220 |
160 |
|
T |
400 |
300 |
240 |
200 |
160 |
|
P |
450 |
270 |
180 |
170 |
110 |
(measured with HLP46, ϑOil = 40 °C ±5 °C)
NG25 (type W.H 25)
Δp-qV characteristic curves
|
Symbol |
Spool position |
Zero position |
|||||
|
P – A |
P – B |
A – T 1) |
B – T 1) |
A – T |
B – T |
P – T |
|
|
E, Y, D |
1 |
1 |
3 |
4 |
|||
|
F |
1 |
1 |
2 |
4 |
2 |
– |
5 |
|
G, T |
1 |
1 |
2 |
5 |
– |
– |
7 |
|
H |
1 |
1 |
2 |
5 |
2 |
2 |
4 |
|
C |
1 |
1 |
2 |
5 |
|||
|
J |
1 |
1 |
2 |
5 |
6 |
5 |
– |
|
K |
1 |
1 |
2 |
5 |
|||
|
L |
1 |
1 |
2 |
4 |
5 |
– |
– |
|
M |
1 |
1 |
3 |
4 |
|||
|
P |
1 |
1 |
3 |
5 |
– |
3 |
5 |
|
Q |
1 |
1 |
2 |
3 |
|||
|
R |
1 |
1 |
3 |
– |
|||
|
U |
1 |
1 |
2 |
5 |
– |
5 |
– |
|
V |
1 |
1 |
2 |
5 |
8 |
7 |
– |
|
Z |
1 |
1 |
2 |
5 |
|||
|
W |
1 |
1 |
3 |
4 |
|||
|
8 Symbol R, spool position B – A |
|||||||
| 1) | The pressure differential refers to the use of port T. If port T1 is additionally used, the pressure differential maybe lower. If only port T1 is used, the relations A – T and B – T may be reversed. |
Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)
NG25 (type W.H 25)
|
2-spool position valve – qV maxin l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring end position in the main valve (with ppilotmin = 13 bar) |
|||||
|
C, D, K, Y, Z |
700 |
700 |
700 |
700 |
650 |
|
X external – spring end position in the main valve 1) |
|||||
|
C |
700 |
700 |
700 |
700 |
650 |
|
D, Y |
700 |
650 |
400 |
350 |
300 |
|
K |
700 |
650 |
420 |
370 |
320 |
|
Z |
700 |
700 |
650 |
480 |
400 |
|
X external – hydraulic end position in the main valve |
|||||
|
HC, HD, HK, HZ, HY |
700 |
700 |
700 |
700 |
700 |
|
HC./O…, HD./O…, HK./O…, HZ./O… |
700 |
700 |
700 |
700 |
700 |
|
HC./OF…, HD./OF…, HK./OF…, HZ./OF… |
700 |
700 |
700 |
700 |
700 |
| 1) | If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails! |
NG25 (type W.H 25)
|
3-spool position valves – qV max in l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring-centered |
|||||
|
E, L, M, Q, U, W |
700 |
700 |
700 |
700 |
650 |
|
G, T |
400 |
400 |
400 |
400 |
400 |
|
F |
650 |
550 |
430 |
330 |
300 |
|
H |
700 |
650 |
550 |
400 |
360 |
|
J |
700 |
700 |
650 |
600 |
520 |
|
P |
650 |
550 |
430 |
430 |
300 |
|
V |
650 |
550 |
400 |
350 |
310 |
|
R |
700 |
700 |
700 |
650 |
580 |
|
X external – pressure-centered (at minimum pilot pressure of 18 bar) |
|||||
|
E, F, H, J, L, M, P, Q, R, U, V, W |
700 |
700 |
700 |
700 |
650 |
|
G, T |
400 |
400 |
400 |
400 |
400 |
|
X external – pressure-centered (with pilot pressure > 30 bar) |
|||||
|
G, T |
700 |
700 |
700 |
700 |
650 |
(measured with HLP46, ϑOil = 40 °C ±5 °C)
Size 32
∆p-qv-characteristic curves – Symbol E, R and W
|
Symbol |
Spool position |
||||
|
P – A |
P – B |
A – T |
B – T |
B – A |
|
|
E |
4 |
4 |
3 |
2 |
– |
|
R |
4 |
4 |
3 |
– |
1 |
|
W |
4 |
4 |
3 |
2 |
– |
Size 32
∆p-qv- characteristic curves – Symbol G and T
|
Symbol |
Spool position |
||||
|
P – A |
P – B |
A – T |
B – T |
P – T |
|
|
G |
7 |
8 |
7 |
5 |
6 |
|
T |
7 |
8 |
7 |
5 |
6 |
Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)
Size 32
|
2-spool position valve – qV maxin l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring end position in the main valve (with ppilot min = 10 bar) |
|||||
|
C, D, K, Y, Z |
1100 |
1040 |
860 |
750 |
680 |
|
X external – spring end position in the main valve 1) |
|||||
|
C |
1100 |
1040 |
860 |
800 |
700 |
|
D, Y |
1100 |
1040 |
540 |
480 |
420 |
|
K |
1100 |
1040 |
860 |
500 |
450 |
|
Z |
1100 |
1040 |
860 |
700 |
650 |
|
X external – hydraulic end position in the main valve |
|||||
|
HC, HD, HK, HZ, HY |
1100 |
1040 |
860 |
750 |
680 |
| 1) | If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails! |
Size 32
|
3-spool position valves – qV max in l/min |
|||||
|
Symbol |
Operating pressure pmax in bar |
||||
|
70 |
140 |
210 |
280 |
350 |
|
|
X external – spring-centered |
|||||
|
E, J, L, M, Q, R, U, W |
1100 |
1040 |
860 |
750 |
680 |
|
G, T, H, F, P |
900 |
900 |
800 |
650 |
450 |
|
V |
1100 |
1000 |
680 |
500 |
450 |
|
X external – pressure-centered (at minimum pilot pressure of 8.5 bar) |
|||||
|
all |
1100 |
1040 |
860 |
750 |
680 |
Performance limits: important information
Notice (applies to all sizes):
The specified switching power limits apply to the use with two directions of flow (e. g. from P to A and simultaneous return flow from B to T at a ratio of 1:1). Due to the flow forces acting within the valves, the admissible switching power limit may be considerably lower with only one direction of flow (e. g. from P to A while port B is blocked, with flow in the same or in different directions)! In such cases of application, please consult us!
The switching power limit was established while the solenoids were at operating temperature, at 10% undervoltage, and without tank preloading.
|
NG16 |
With pilot oil supply X internal, a preload valve has to be used for flows < 160 l/min due to the negative overlap of the symbols C, Z and HC, HZ. 4/3 directional valves with pressure centering of the control spool in the main valve can be used above the indicated performance limit. In this case, a higher pilot pressure is required (values see performance limits of the corresponding size). With pilot oil supply X internal, sufficient flow needs to be ensured due to the negative overlap of symbols F, G, H, P, S and T (for determination of the required flow, see "Preload valve" characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data). |
|
NG25 („WEH 22“) |
With pilot oil supply X internal a preload valve has to be used for flows < 180 l/min due to the negative overlap of spools Z, HZ and V. With pilot oil supply X internal sufficient flow needs to be ensured due to the negative overlap of symbols C, HC, F, G, H, P and T (for determination of the required flow, see “Preload valve” characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data). |
|
NG25 („WEH 25“) |
With pilot oil supply X internal, a preload valve has to be used for flows < 180 l/min due to the negative overlap of symbols Z, HZ and V. 4/3 directional valves with pressure centering of the control spool in the main valve can be used above the indicated performance limit. In this case, a higher pilot pressure is required (values see performance limits of the corresponding size). With pilot oil supply X internal, sufficient flow needs to be ensured due to the negative overlap of symbols C, HC, F, G, H, P and T (for determination of the required flow, see "Preload valve"characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data). |
|
NG32 |
With pilot oil supply X internal, a preload valve has to be used for flows < 180 l/min due to the negative overlap of symbols Z, HZ and V. 4/3 directional valves with pressure centering of the control spool in the main valve can be used above the indicated performance limit. In this case, a higher pilot pressure is required (values see performance limits of the corresponding size). With pilot oil supply X internal, sufficient flow needs to be ensured due to the negative overlap of symbols C, HC, F, G, H, P and T (for determination of the required flow, see "Preload valve" characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data). |
|
Symbol |
Spool position |
Zero position |
|||||
|
P – A |
P – B |
A – T 1) |
B – T 1) |
A – T |
B – T |
P – T |
|
|
E, Y, D, Q, V, W, Z |
1 |
1 |
3 |
5 |
|||
|
F |
1 |
3 |
1 |
4 |
3 |
– |
6 |
|
G, T |
4 |
2 |
4 |
7 |
– |
– |
8 |
|
H, C |
3 |
3 |
1 |
7 |
1 |
5 |
5 |
|
J, K |
1 |
2 |
1 |
6 |
|||
|
L |
2 |
2 |
1 |
4 |
2 |
– |
– |
|
M |
3 |
3 |
2 |
5 |
|||
|
P |
3 |
1 |
2 |
7 |
– |
5 |
7 |
|
R |
1 |
2 |
3 |
– |
|||
|
U |
2 |
2 |
3 |
6 |
– |
6 |
– |
|
A, B |
1 |
1 |
– |
– |
|||
| 1) | The pressure differential refers to the use of port T. If port T1 is additionally used, the pressure differential maybe lower. If only port T1 is used, the relations A – T and B – T may be reversed. |
2 spool positions
| 1) | Only for NG10 and 25 ("WEH 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as aleakage port! |
|
Ordering code |
Type of actuation |
|
|
Symbol |
Spool return |
Type WEH (electro-hydraulic) |
|
A 1), C, D, K, Z |
../.. |
|
|
..H../.. |
|
|
|
..H../O |
|
|
|
..H../OF |
|
|
|
B 1),Y |
../.. |
|
|
..H../.. |
|
|
| 1) | Only for NG10 and 25 ("WEH 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as aleakage port! |
3 spool positions
| 2)Example: Symbol E with actuating side "a" → ordering code ..EA.. | |
| 3) Symbol S only for NG16 |
|
Ordering code |
Type of actuation |
||
|
Symbol |
Actuating side |
Spool return |
Type WEH (electro-hydraulic) |
|
E, F, G, H, J, L, M, P, Q, R, S, T, U, V, W |
../.. |
|
|
|
.A |
|
||
|
.B |
|
||
|
..H../.. |
|
||
|
H.A |
|
||
|
H.B |
|
||
Symbols for valves with 2 spool positions
Symbols for valves with 3 spool positions
Notice:
3-spool position valves, pressure-centered, preferably with external pilot oil supply and/or return ("no code", "E") For preconditions for internal pilot oil supply and/or return ("ET", "T"), see Symbols and Technical data
Inductive position switch type QM Switching logics
Version QMA
(Position switch on side B, monitored spool position of the main stage "a")
Version QMA
(Position switch on side B, monitored spool position of the main stage "a")
Version QMB
(Position switch on side A, monitored spool position of the main stage "b")
Version QMB
(Position switch on side A, monitored spool position of the main stage "b")
version QMAB
(Position switch on side A and B, monitored spool position "a" and "b")
Version QM0
(Position switch on side A and B, monitored spool position "0")
| 1) No signal change at the position switch on side B with spool position "a" | |
| 2) No signal change at the position switch on side A with spool position "b" |
Version QM0
(Position switch on side B, monitored spool position of the main stage "0")
Version QM0
(Position switch on side A, monitored spool position of the main stage "0")
NG10
Dimensions in mm
|
|
Required surface quality of the valve contact surface |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
|
1 |
Main valve |
|
2 |
Pilot control valve type 4WE 6... according to data sheet 23208: |
|
2.1 |
Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return |
|
2.2 |
Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return |
|
2.3 |
Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered |
|
3.1 |
Solenoid “a” |
|
3.2 |
Solenoid “b” |
|
4 |
Manual override, “N”, optional Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no. R900024943). When the manual override is blocked, the operation of the solenoid must be prevented! The simultaneous actuation of the solenoids must be prevented! |
|
5 |
Solenoid without manual override |
|
6 |
Solenoid with manual override |
|
8 |
Switching time adjustment (wrench size 6), optional |
|
9 |
Pressure reducing valve, optional |
|
10.1 |
Machined valve contact surface; porting pattern according to ISO 4401-05-05-0-05 |
|
11 |
Name plate pilot control valve |
|
12 |
Name plate complete valve |
|
13 |
Seal rings |
|
14 |
Space required to remove the mating connector |
NG16
Dimensions in mm
|
|
|
Required surface quality of the valve contact surface |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
|
1 |
Main valve |
|
2 |
Pilot control valve type 4WE 6... according to data sheet 23208: |
|
2.1 |
Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return |
|
2.2 |
Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return |
|
2.3 |
Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered |
|
3.1 |
Solenoid “a” |
|
3.2 |
Solenoid “b” |
|
4 |
Manual override, “N”, optional Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no. R900024943). When the manual override is blocked, the operation of the solenoid must be prevented! The simultaneous actuation of the solenoids must be prevented! |
|
5 |
Solenoid without manual override |
|
6 |
Solenoid with manual override |
|
8 |
Switching time adjustment (wrench size 6), optional |
|
9 |
Pressure reducing valve, optional |
|
10.2 |
machined valve contact surface; porting pattern according to ISO 4401-07-07-0-05 |
|
11 |
Name plate pilot control valve |
|
12 |
Name plate complete valve |
|
13 |
Seal rings |
|
14 |
Space required to remove the mating connector |
|
15 |
2-spool position valves with spring end position in the main valve (spool symbols A, C, D, K, Z) |
|
16 |
2-spool position valves with spring end position in the main valve (spool symbols B, Y) |
|
17 |
3-spool position valves, spring-centered; |
|
18 |
3-spool position valves, pressure-centered |
|
19 |
Locking pin |
NG25 (type W.H 22)
Dimensions in mm
| 1) | Port L only for valves with pressure-centered zero position |
|
|
|
Required surface quality of the valve contact surface |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
|
1 |
Main valve |
|
2 |
Pilot control valve type 4WE 6... according to data sheet 23208: |
|
2.1 |
Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return |
|
2.2 |
Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return |
|
2.3 |
Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered |
|
3.1 |
Solenoid “a” |
|
3.2 |
Solenoid “b” |
|
4 |
Manual override, “N”, optional Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no. R900024943). When the manual override is blocked, the operation of the solenoid must be prevented! The simultaneous actuation of the solenoids must be prevented! |
|
5 |
Solenoid without manual override |
|
6 |
Solenoid with manual override |
|
8 |
Switching time adjustment (wrench size 6), optional |
|
9 |
Pressure reducing valve, optional |
|
10.3 |
machined valve contact surface; porting pattern according to ISO 4401-08-08-0-05 |
|
11 |
Name plate pilot control valve |
|
12 |
Name plate complete valve |
|
13 |
Seal rings |
|
14 |
Space required to remove the mating connector |
|
19 |
Locking pin |
NG25 (type W.H 25)
Dimensions in mm
| 1) | Port L only for valves with pressure-centered zero position |
|
|
|
Required surface quality of the valve contact surface |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
|
1 |
Main valve |
|
2 |
Pilot control valve type 4WE 6... according to data sheet 23208: |
|
2.1 |
Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return |
|
2.2 |
Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return |
|
2.3 |
Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered |
|
3.1 |
Solenoid “a” |
|
3.2 |
Solenoid “b” |
|
4 |
Manual override, “N”, optional Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no. R900024943). When the manual override is blocked, the operation of the solenoid must be prevented! The simultaneous actuation of the solenoids must be prevented! |
|
5 |
Solenoid without manual override |
|
6 |
Solenoid with manual override |
|
8 |
Switching time adjustment (wrench size 6), optional |
|
9 |
Pressure reducing valve, optional |
|
10.3 |
machined valve contact surface; porting pattern according to ISO 4401-08-08-0-05 |
|
11 |
Name plate pilot control valve |
|
12 |
Name plate complete valve |
|
13 |
Seal rings |
|
14 |
Space required to remove the mating connector |
|
15 |
2-spool position valves with spring end position in the main valve (spool symbols A, C, D, K, Z) |
|
16 |
2-spool position valves with spring end position in the main valve (spool symbols B, Y) |
|
17 |
3-spool position valves, spring-centered; |
|
18 |
3-spool position valve, pressure-centered |
|
19 |
Locking pin |
Size 32
Dimensions in mm
|
|
|
Required surface quality of the valve contact surface |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
|
1 |
Main valve |
|
2 |
Pilot control valve type 4WE 6... according to data sheet 23208: |
|
2.1 |
Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return |
|
2.2 |
Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return |
|
2.3 |
Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered |
|
3.1 |
Solenoid “a” |
|
3.2 |
Solenoid “b” |
|
4 |
Manual override, “N”, optional Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no. R900024943). When the manual override is blocked, the operation of the solenoid must be prevented! The simultaneous actuation of the solenoids must be prevented! |
|
5 |
Solenoid without manual override |
|
6 |
Solenoid with manual override |
|
8 |
Switching time adjustment (wrench size 6), optional |
|
9 |
Pressure reducing valve, optional |
|
10.4 |
machined valve contact surface; porting pattern according to ISO 4401-10-09-0-05 |
|
11 |
Name plate pilot control valve |
|
12 |
Name plate complete valve |
|
13 |
Seal rings |
|
14 |
Space required to remove the mating connector |
|
15 |
2-spool position valves with spring end position in the main valve (spool symbols A, C, D, K, Z) |
|
16 |
2-spool position valves with spring end position in the main valve (spool symbols B, Y) |
|
17 |
3-spool position valves, spring-centered; |
|
18 |
3-spool position valve, pressure-centered |
|
19 |
Locking pin |
Subplates (separate order) with porting pattern according to ISO 4401 see data sheet 45100.
Valve mounting screws (separate order)
– NG10:
4 hexagon socket head cap screws, metric
ISO 4762 - M6 x 45 - 10.9-flZn-240h-L
(Friction coefficientμtotal = 0.09 to 0.14);
Tightening torque MA = 12.5 Nm ± 10%,
material no. R913000258
4 hexagon socket head cap screws UNC 1/4-20 UNC x 1 3/4″ ASTM-A574
upon request
– NG16:
4 hexagon socket head cap screws, metric
ISO 4762 - M10 x 60 - 10.9-flZn-240h-L
(friction coefficientμtotal = 0.09 to 0.14);
Tightening torque MA = 75 Nm ± 10%,
Material no. R913000116
2 hexagon socket head cap screws, metric
ISO 4762 - M6 x 60 - 10.9-flZn-240h-L
(Friction coefficient μtotal = 0.09 to 0.14);
Tightening torque MA = 12,5 Nm ± 10%,
material no. R913000115
4 hexagon socket head cap screws UNC 3/8-16 UNC x 2 1/4″ ASTM-A574
upon request
2 hexagon socket head cap screws UNC 1/4-20 UNC x 1/4″ ASTM-A574
upon request
– NG25:
6 hexagon socket head cap screws, metric
ISO 4762 - M12 x 60 - 10.9-flZn-240h-L
(friction coefficient μtotal = 0.09 to 0.14);
Tightening torque MA = 130 Nm ± 10%,
Material no. R913000121
6 hexagon socket head cap screws UNC 1/2-13 UNC x 2 1/2″ ASTM-A574
upon request
– NG32:
6 hexagon socket head cap screws, metric
ISO 4762 - M20 x 80 - 10.9-flZn-240h-L
(friction coefficient μtotal = 0.09 to 0.14);
Tightening torque MA = 430 Nm ± 10%,
Material no. R901035246
6 hexagon socket head cap screws UNC 3/4-10 UNC x 3 1/4″ ASTM-A574
upon request
Stroke setting, mounting options
The stroke of the control spool is limited by the stroke setting (1). The control spool stroke is shortened by loosening the lock nut (2) and clockwise rotation of the adjustment spindle (3). The control chamber (4) must be depressurized for this.
|
NG |
L4 |
|
mm |
|
| 10 | 6.5 |
| 16 | 10 |
| 25 (WEH22) | 9.5 |
| 25 (WEH25) | 12.5 |
| 32 | 15 |
5 adjustment range
– NG10:
1 rotation = 1 mm adjustment travel
– NG16 to 32:
1 rotation = 1.5 mm adjustment travel
Stroke setting, mounting options
Stroke limitation on side A
Stroke setting, mounting options
Stroke limitation on side B
|
Mounting options |
NG |
3-spool position valve 1) |
|||||
|
Spring-centered |
Pressure-centered |
||||||
|
L1 (mm) |
L2 (mm) |
L3 (mm) |
L1 (mm) |
L2 (mm) |
L3 (mm) |
||
|
Stroke setting on valve side A and B |
10 |
90 |
144 |
234 |
|
|
|
|
16 |
100 |
200 |
300 |
|
|
|
|
|
25 2) |
96 |
241 |
337 |
|
|
|
|
|
25 3) |
123 |
276 |
399 |
|
|
|
|
|
32 |
133 |
344 |
477 |
|
|
|
|
|
Stroke setting on valve side A |
10 |
90 |
106 |
196 |
|
|
|
|
16 |
100 |
156 |
256 |
|
|
|
|
|
25 2) |
96 |
193 |
289 |
|
|
|
|
|
25 3) |
123 |
225 |
348 |
|
|
|
|
|
32 |
133 |
287 |
420 |
|
|
|
|
|
Stroke setting on valve side B |
10 |
52 |
144 |
196 |
– |
– |
– |
|
16 |
56 |
200 |
256 |
81 |
200 |
281 |
|
|
25 2) |
48 |
241 |
289 |
– |
– |
– |
|
|
25 3) |
72 |
276 |
348 |
107 |
276 |
283 |
|
|
32 |
76 |
344 |
420 |
120 |
344 |
464 |
|
| 1) | With symbol A only version "11", with symbol B only version "12" possible. |
| 2) | Version "W.H 22" |
| 3) | Version "W.H 25" |
| 1) With spool symbol A only version “11”, with spool symbol B only version “12” possible. | |
| 2) Type WEH 22... | |
| 3) Type WEH 25... |
|
Mounting options |
NG |
2-spool position valve |
||||||||
|
Spring end position |
Hydraulic end position |
|||||||||
|
A, C, D, K, Z |
B, Y |
HC, HD, HK, HZ, HY |
||||||||
|
L1 (mm) |
L2 (mm) |
L3 (mm) |
L1 (mm) |
L2 (mm) |
L3 (mm) |
L1 (mm) |
L2 (mm) |
L3 (mm) |
||
|
Stroke setting on valve side A and B |
10 |
90 |
144 |
234 |
90 |
144 |
234 |
90 |
144 |
234 |
|
16 |
– |
– |
– |
– |
– |
– |
100 |
200 |
300 |
|
|
25 1) |
96 |
241 |
337 |
96 |
241 |
337 |
96 |
241 |
337 |
|
|
25 2) |
– |
– |
– |
– |
– |
– |
123 |
276 |
399 |
|
|
32 |
– |
– |
– |
– |
– |
– |
133 |
344 |
477 |
|
|
Stroke setting on valve side A |
10 |
90 |
106 |
196 |
– |
– |
– |
90 |
106 |
196 |
|
16 |
100 |
180 |
280 |
– |
– |
– |
100 |
156 |
256 |
|
|
25 1) |
96 |
193 |
289 |
96 |
193 |
289 |
96 |
193 |
289 |
|
|
25 2) |
123 |
253 |
376 |
– |
– |
– |
123 |
225 |
348 |
|
|
32 |
133 |
316 |
449 |
– |
– |
– |
133 |
287 |
420 |
|
|
Stroke setting on valve side B |
10 |
52 |
144 |
196 |
52 |
144 |
196 |
52 |
144 |
196 |
|
16 |
– |
– |
– |
80 |
200 |
280 |
56 |
200 |
256 |
|
|
25 1) |
48 |
241 |
289 |
48 |
241 |
289 |
48 |
241 |
289 |
|
|
25 2) |
– |
– |
– |
100 |
276 |
376 |
72 |
276 |
348 |
|
|
32 |
– |
– |
– |
105 |
344 |
449 |
76 |
344 |
420 |
|
| 1) | Version "W.H 22" |
| 2) | Version "W.H 25" |
| 1) With spool symbol A only version “11”, with spool symbol B only version “12” possible. | |
| 2) Type WEH 22... | |
| 3) Type WEH 25... |
Spool position monitoring
Inductive position switch type QM
Dimensions in mm
| 1) | Without mating connector |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
|
Mounting options – 2-spool position valve |
||||||||||||||
|
Monitored spool position |
Ordering code |
NG |
Hydraulic end position HC, HD, HK, HZ, HY |
Spring end position C, D, K, Z |
Spring end position Y |
|||||||||
|
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
|||
|
„a“ Position switch on side B |
QMAG24 |
10 |
211 |
57 |
211 |
57 |
211 |
57 |
||||||
|
16 |
259 |
55 |
259 |
55 |
||||||||||
|
25 2) |
294 |
47 |
294 |
47 |
294 |
47 |
||||||||
|
25 3) |
325 |
72 |
325 |
72 |
||||||||||
|
32 |
371 |
76 |
371 |
76 |
||||||||||
|
„b“ Position switch on side A |
QMBG24 |
10 |
157 |
111 |
157 |
111 |
157 |
111 |
||||||
|
16 |
159 |
155 |
159 |
155 |
||||||||||
|
25 2) |
149 |
192 |
149 |
192 |
149 |
192 |
||||||||
|
25 3) |
172 |
225 |
172 |
225 |
||||||||||
|
32 |
161 |
287 |
161 |
287 |
||||||||||
|
"a" and "b" Position switch on side A and B |
QMABG24 |
10 |
157 |
211 |
157 |
211 |
157 |
211 |
||||||
|
16 |
159 |
259 |
||||||||||||
|
25 2) |
149 |
294 |
149 |
294 |
149 |
294 |
||||||||
|
25 3) |
172 |
325 |
||||||||||||
|
32 |
161 |
371 |
||||||||||||
| 1) Without mating connector | |
| 2) Type 4W.H 22.. | |
| 3) Type 4W.H 25.. |
|
Mounting options – 3-spool position valve |
||||||||||
|
Monitored spool position |
Ordering code |
NG |
Spring-centered |
Pressure-centered |
||||||
|
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
|||
|
„a“ Position switch on side B |
QMAG24 |
10 |
211 |
57 |
||||||
|
16 |
259 |
55 |
259 |
81 |
||||||
|
25 2) |
294 |
47 |
||||||||
|
25 3) |
325 |
72 |
325 |
107 |
||||||
|
32 |
371 |
76 |
371 |
120 |
||||||
|
„b“ Position switch on side A |
QMBG24 |
10 |
157 |
111 |
||||||
|
16 |
159 |
155 |
||||||||
|
25 2) |
149 |
192 |
||||||||
|
25 3) |
172 |
225 |
||||||||
|
32 |
161 |
287 |
||||||||
|
"a" and "b" Position switch on side A and B |
QMABG24 |
10 |
157 |
211 |
||||||
|
16 |
159 |
259 |
||||||||
|
25 2) |
149 |
294 |
||||||||
|
25 3) |
172 |
325 |
||||||||
|
32 |
161 |
371 |
||||||||
|
Zero position Position switch on side A and B 2 position switches |
QM0G24 4) |
10 |
157 |
211 |
||||||
|
16 |
159 |
259 |
||||||||
|
25 2) |
149 |
294 |
||||||||
|
25 3) |
172 |
325 |
||||||||
|
32 |
161 |
371 |
||||||||
| 1) | Without mating connector |
| 2) | Version "W.H 22" |
| 3) | Version "W.H 25" |
| 4) | 3-spool position valve |
| 1) Without mating connector | |
| 2) Type 4W.H 22 | |
| 3) Type 4W.H 25 | |
| 4) 3-spool position valve | |
|
Mounting options – 3-spool position valve with one solenoid |
||||||||||||||
|
Monitored spool position |
Ordering code |
NG |
Side A (EA, FA…) Spring-centered |
Solenoids on side B (EB, FB…) Spring-centered |
Side A (EA, FA…) Pressure-centered |
|||||||||
|
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
L1 (mm) 1) |
L2 (mm) 1) |
L3 (mm) |
L4 (mm) |
|||
|
„a“ Position switch on side B |
QMAG24 |
10 |
211 |
57 |
||||||||||
|
16 |
259 |
55 |
259 |
81 |
||||||||||
|
25 2) |
294 |
47 |
||||||||||||
|
25 3) |
325 |
72 |
325 |
107 |
||||||||||
|
32 |
371 |
371 |
120 |
|||||||||||
|
„b“ Position switch on side A |
QMBG24 |
10 |
157 |
111 |
||||||||||
|
16 |
159 |
155 |
||||||||||||
|
25 2) |
149 |
192 |
||||||||||||
|
25 3) |
172 |
225 |
||||||||||||
|
32 |
161 |
287 |
||||||||||||
|
Zero position Position switch on side A or B 1 position switches |
QM0G24 4) |
10 |
211 |
57 |
157 |
111 |
||||||||
|
16 |
259 |
55 |
159 |
155 |
259 |
81 |
||||||||
|
25 2) |
294 |
47 |
149 |
192 |
||||||||||
|
25 3) |
325 |
72 |
172 |
225 |
325 |
107 |
||||||||
|
32 |
371 |
76 |
161 |
287 |
371 |
120 |
||||||||
| 1) Without mating connector | |
| 2) Type 4W.H 22.. | |
| 3) Type 4W.H 25.. | |
| 4) 2-spool position valve | |
Mounting options – 2-spool position valve
|
Monitored spool position |
Ordering code |
Size |
Hydraulic end position HC, HD, HK, HZ, HY |
|
|
L2 1) |
L3 |
|||
|
mm |
mm |
|||
| “a” position switch on side B | QMAG24 | 25 | 294 | 47 |
| 1) | Without mating connector |
Mounting options – 2-spool position valve
|
Monitored spool position |
Ordering code |
Size |
Spring end position C, D, K, Z |
|
|
L2 1) |
L3 |
|||
|
mm |
mm |
|||
| “a” position switch on side B | QMAG24 | 25 | 294 | 47 |
| 1) | Without mating connector |
Mounting options – 2-spool position valve
|
Monitored spool position |
Ordering code |
Size |
Spring end position Y |
|
|
L2 1) |
L3 |
|||
|
mm |
mm |
|||
| “a” position switch on side B | QMAG24 | 25 | 294 | 47 |
| 1) | Without mating connector |
Mounting options – 2-spool position valve
|
Monitored spool position |
Ordering code |
Size |
Hydraulic end position HC, HD, HK, HZ, HY |
|
|
L1 1) |
L3 |
|||
|
mm |
mm |
|||
| “b” position switch on side A | QMBG24 | 25 | 149 | 192 |
| 1) | Without mating connector |
Mounting options – 2-spool position valve
|
Monitored spool position |
Ordering code |
Size |
Spring end position C, D, K, Z |
|
|
L1 1) |
L4 |
|||
|
mm |
mm |
|||
| “b” position switch on side A | QMBG24 | 25 | 149 | 192 |
| 1) | Without mating connector |
Mounting options – 2-spool position valve
|
Monitored spool position |
Ordering code |
Size |
Spring end position Y |
|
|
L1 1) |
L4 |
|||
|
mm |
mm |
|||
| “b” position switch on side A | QMBG24 | 25 | 149 | 192 |
| 1) | Without mating connector |
Switching time adjustment
Type 4WEH 10 ..4X/…S
Type 4WEH 10 ..4X/…S2
The switching time of the main valve (1) is influenced by using a twin throttle check valve (2) (type Z2FS 6; data sheet 27506).
Modification of supply (3) to discharge control (4):
Remove the pilot control valve (5) – The plate (6) to accept the seal rings stays in place – Turn the switching time adjustment (2) around its longitudinal axis and put it back, install the pilot control valve (5).
Notice:
The modification may only be performed by authorized specialists or at the factory!
"D3” pressure reducing valve
Type 4WEH 10 ..4X/…/..D3
The pressure reducing valve (8) has to be used at a pilot pressure above 250 bar (with type WEH 22 …: 210 bar) and with version “H”.
The secondary pressure is kept at a constant level of 45 bar.
Notice:
If a pressure reducing valve "D3" (8) is used, a "B10" throttle insert has to be installed in channel P of the pilot control valve. The modification may only be performed by authorized specialists or at the factory!Preload valve (not for NG10)
In case of valves with depressurized circulation and internal pilot oil supply, the installation of the preload valve (9) in channel P of the main valve is required in order to build up the minimum pilot pressure.
The pressure differential of the preload valve is to be added to the pressure differential of the main valve (see characteristic curves) to result in one total value.
The cracking pressure is approx. 4.5 bar.
Notice:
Series-production status, see ordering key on the name plate.
|
9.1 |
Preload valve NG16 |
|
9.2 |
Preload valve NG25 and NG32 |
|
10 |
Main valve |
|
11 |
Subplate |
|
Size |
Material number P4,5 |
|
|
Item 9.2 |
Item 9.1 |
|
|
16 |
R961009417 (up to component series 71) |
R961009415 (from component series 72) |
|
25 („W.H 22“) |
R961009609 (up to component series 76) |
- |
|
25 („W.H 25“) |
R961009416 (up to component series 67) |
R961009166 (from component series 68) |
|
32 |
R961009610 (up to component series 63) |
- |
Δp–qVcharacteristic curve (measured with HLP46, ϑOil = 40 °C ± 5 °C)
|
1 |
NG16 |
|
2 |
NG25 (type 4W.H 25 …) |
|
3 |
NG25 (type 4W.H 22 …) |
|
4 |
NG32 |
The stipulations of the Machinery Directive 2006/42/EC are to be adhered to! Please also note data sheet 08012 with information on MTTFd values and shock and vibration loads!
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