DBW 20 BG2-4X/315-6EW110N9K4V/12 W65
Manufacturer: Bosch Rexroth
Material #: R978025097
Model : DBW 20 BG2-4X/315-6EW110N9K4V/12 W65
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth DBW 20 BG2-4X/315-6EW110N9K4V/12 W65 (R978025097) is a sophisticated pilot-operated pressure relief valve designed for the precise limitation and solenoid-actuated unloading of operating pressure in hydraulic systems. This valve features a robust housing and an integrated pilot control valve with various adjustment types, including a rotary knob, sleeve with hexagon and protective cap, lockable rotary knob with scale, and a rotary knob with scale for user-friendly pressure setting.
At the heart of the DBW 20 BG2-4X/315-6EW110N9K4V/12 W65 lies the main spool which responds to changes in pressure at channel P. When the pressure exceeds the preset value, the poppet opens against its spring, allowing hydraulic fluid to flow into the spring chamber and subsequently to the tank—either internally or externally depending on the version of the valve. This action helps maintain equilibrium at the main spool, ensuring that operating pressure is sustained at set levels.
Additionally, this model features a pressure gauge connection for monitoring operating pressure. The valve can also be switched to another pressure setting or unloaded via port X. Unloading of the main spool is achieved through an attached directional valve.
With its maximum operating pressure of up to 315 bar and maximum flow rate specifications, this Bosch Rexroth relief valve is suitable for various applications requiring reliable and efficient control of hydraulic pressures. Its built-in directional spool valve facilitates solenoid-operated unloading, making it versatile for diverse operational needs. The DBW series valves are recognized for their performance and reliability in controlling system pressures within complex hydraulic circuits.
$1,398.00 USD
More are expected on April 21, 2025
Status: This product is temporarily out of stock.
Qty: Delivered as early as April 21, 2025 when ordered in
This product is eligible for factory repair.
Valves of type DBW are pilot-operated pressure relief valves. They are used for limitation and solenoid-actuated unloading of the operating pressure.
The valves basically consist of housing (1) and pilot control valve (2) with adjustment type.
The pressure applied to channel P acts on the main spool (3). Via the nozzle bores (4 and 5), the pressure is at the same time applied to poppet (6). If the pressure in channel P exceeds the value set at spring (7), poppet (6) opens against spring (7). Via the nozzle bores (4 and 5), the hydraulic fluid from channel P now flows into the spring chamber (8). From here, it is led into the tank internally (version "–"), via the control line (9 and 10), or externally (version "Y") via the control line (9 and 11).
Due to the state of equilibrium at the main spool (3), hydraulic fluid flows from channel P to channel T, maintaining the set operating pressure.
A pressure gauge connection (12) allows for the control of the operating pressure.
The pressure relief valve can be unloaded or switched to another pressure (second pressure rating) via port X (13).
The main spool (3) is unloaded by controlling a built-on directional valve.
|
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
||
|
DB |
W |
G |
– |
4X |
/ |
6E |
K4 |
W65 |
* |
|
Type |
||
|
01 |
Pressure relief valve |
DB |
|
02 |
With attached directional valve |
W |
|
Size |
||
|
03 |
Size 10 |
|
|
Threaded connection "G" (G1 1/2) |
10 |
|
|
Size 25 |
||
|
Threaded connection "G" (G3/4) |
15 |
|
|
Threaded connection "G" (G1) |
20 |
|
|
Type of connection |
||
|
04 |
Normally closed |
A |
Normally open |
B |
|
|
05 |
Threaded connection |
G |
|
Adjustment type |
||
|
06 |
Rotary knob |
1 |
|
Sleeve with hexagon and protective cap |
2 |
|
|
Lockable rotary knob with scale |
3 1) |
|
|
Rotary knob with scale |
7 |
|
|
Component series |
||
|
07 |
Component series 40 ... 49 (40 ... 49: unchanged installation and connection dimensions) |
4X |
|
Pressure rating |
||
|
08 |
Set pressure up to 50 bar |
50 |
|
Set pressure up to 100 bar |
100 |
|
|
Set pressure up to 200 bar |
200 |
|
|
Set pressure up to 315 bar |
315 |
|
|
Pilot oil supply and pilot oil return (see also Symbols) |
||
|
09 |
Pilot oil supply and pilot oil return, internal |
– 2) |
|
External pilot oil supply, internal pilot oil return |
X |
|
|
Internal pilot oil supply, external pilot oil return |
Y |
|
|
Pilot oil supply and pilot oil return external |
XY |
|
|
Version |
||
|
10 |
Standard version |
no code |
|
Valve for minimum cracking pressure (not suitable for mutual relief!) |
U |
|
|
11 |
With directional spool valve (data sheet 23178) |
6E |
|
12 |
Direct voltage 24 V |
G24 |
|
Alternating voltage 230 V, 50/60 Hz |
W230 |
|
|
Manual override |
||
|
13 |
With concealed manual override (standard) |
N9 |
|
With manual override |
N |
|
|
Electrical connection |
||
|
14 |
without mating connector with connector DIN EN 175301-803 |
K4 |
|
Seal material |
||
|
15 |
NBR seals |
no code |
|
FKM seals |
V |
|
|
(other seals upon request) Attention! Observe compatibility of seals with hydraulic fluid used! |
||
|
Installation position |
||
|
16 |
Vertical installation position of the screw-in cartridge valve (cartridge) |
W65 |
|
17 |
Further details in the plain text |
* |
| 1)H-key with material no. R900008158 is included in the scope of delivery. | |
| 2)Dash "–" only without specification of "U". |
Notice:
Preferred types and standard units are contained in the EPS (standard price list).
(measured with HLP46, ϑOil = 40 ±5 °C)
Inlet pressure dependent on the flow
Threaded connection
Minimum set pressure and circulation pressure dependent on the flow 1)
Standard version
| 1) | The characteristic curves apply to the pressure at the valve output pT = 0 bar across the entire flow range. |
Minimum set pressure and circulation pressure dependent on the flow 1)
Version “U”
| 1) | The characteristic curves apply to the pressure at the valve output pT = 0 bar across the entire flow range. |
Notices!
The characteristic curves were measured with external, depressurized pilot oil return.
Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port T.
Type DBW…–…
Type DBW…X…
Type DBW…Y…
Type DBW…XY…
Threaded connection
Dimensions in mm
|
1 |
Name plate |
|
2 |
Port X for remote control, optional |
|
3 |
Y port for pilot oil return, external |
|
4 |
Adjustment type "1" |
|
5 |
Adjustment type "2" |
|
6 |
Adjustment type "3" |
|
7 |
Adjustment type "7" |
|
8 |
Lock nut SW22, tightening torque MA = 10±5 Nm |
|
9 |
Hexagon SW10 |
|
10 |
Hexagon SW30, tightening torque MA = 50 Nm |
|
11 |
Space required to remove the key |
|
17 |
Grub screw is omitted with internal pilot oil return |
|
18 |
Directional spool valve NG6 (data sheet 23178) |
|
19 |
Mating connector without circuitry (separate order) |
|
20 |
Mating connector with circuitry (separate order) |
|
21 |
Dimension for valve without manual override |
|
22 |
Dimension for valve with manual override "N" |
|
23 |
Dimension for valve with concealed manual override "N9" |
|
24 |
Housing for version "W“ |
|
25 |
Space required to remove the mating connector |
|
26 |
Valve contact surface; port A is not bored |
|
27 |
Space required to remove the solenoid coil |
|
Version |
D1 |
ØD2 |
|
mm |
||
| DB.10.G | G1/2 | 34 |
| DB.15.G | G3/4 | 42 |
| DB.20.G | G1 | 47 |
Mounting cavity
Version "XY" and type-examination tested safety valves version "Y…E"
Dimensions in mm
| 1) | Installation depth |
|
|
Required surface quality of the valve contact surface |
|
37 |
Bore X, Y and T optionally at the circumference for version "XY" Bore T optionally at the circumference for version "Y" (no separate bore Y required; pilot oil return via bore T) |
|
38 |
Depth of fit |
|
39 |
Bore Ø2.5 mm is only to be bored if required |
|
40 |
Port X does not have to be bored for type-examination tested safety valves version "Y…E" as it does not have any function! |
Version “Y”
Dimensions in mm
| 1) | Installation depth |
|
|
|
Required surface quality of the valve contact surface |
|
37 |
Bore X, Y and T optionally at the circumference for version "XY" Bore T optionally at the circumference for version "Y" (no separate bore Y required; pilot oil return via bore T) |
|
38 |
Depth of fit |
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
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