M-3SED6CK1X/350CW110RN9XEZ2/V
Manufacturer: Bosch Rexroth
Material #: R901270798
Model : M-3SED6CK1X/350CW110RN9XEZ2/V
***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 M-3SED6CK1X/350CW110RN9XEZ2/V (R901270798) is a high-performance directional seat valve that is direct operated with solenoid actuation. This valve is designed to control the start, stop, and direction of fluid flow within hydraulic systems. It consists of a durable housing, a robust solenoid, precision valve seats, and a control spool to ensure reliable operation under various conditions. The valve features a manual override for switching operations in the absence of solenoid power.
The M-3SED6CK1X/350CW110RN9XEZ2/V operates on the basic principle where its initial position—either normally open (UK) or normally closed (CK)—is determined by the spring arrangement. The pressure compensation feature allows for consistent performance despite varying actuating forces from the solenoid and spring. The control spool manages the flow through ports P, A, and T which can withstand maximum operating pressures.
This model also includes an option for using a throttle insert when necessary to manage flow rates during switching processes that may exceed the valve's performance limits. Additionally, with the integration of a sandwich plate known as the Plus plate beneath the valve, further functional configurations can be achieved.
The M-3SED6CK1X/350CW110RN9XEZ2/V offers flexibility in application with symbols UK and CK for different seat arrangements and potential options D and Y when used with the Plus plate. It provides schematic illustrations for better understanding of initial positions and transitions during operation.
For applications requiring precise flow control in potentially explosive atmospheres, this directional seat valve adheres to ISO porting patterns (excluding locating hole) and features wet-pin DC or AC solenoids for electrical actuation. It allows individual connection customization with cable gland options and includes an optional concealed manual override.
In summary, this Bosch Rexroth directional seat valve stands out for its direct operability, robust design, pressure compensation feature, manual override option, flexible configurations with additional inserts like throttle or check valves, suitability for explosive environments, and customizable electrical connections—all encapsulated within part number R901270798.
$2,524.00 USD
More are expected on April 14, 2025
Status: This product is temporarily out of stock.
Qty: Delivered as early as April 14, 2025 when ordered in
This product is eligible for factory repair.
3/2 directional seat valve
General information
Directional valves of type SED are direct operated directional seat valve with solenoid actuation.
They control start, stop and direction of flow.
The directional valves basically consists of a housing (1), the solenoid (2), the valve seats (7) and (11) as well as of the control spool (4).
The manual override (6) allows for the switching of the valve without solenoid energization.
Basic principle
The initial position of the valve (normally open "UK" or normally closed "CK") is determined by the arrangement of the spring (5). The chamber (3) behind the control spool (4) is connected to port P and sealed against port T. Thus, the valve is pressure-compensated in relation to the actuating forces (solenoid and spring).
By means of the control spool (4), the ports P, A and T can be loaded with the maximum operating pressure (350 bar) and the flow can be directed in both directions (see symbols).
In the initial position, the control spool (4) is pressed onto the seat (11) by the spring (5), in spool position, it is pressed onto the seat (7) by the solenoid (2). The flow is blocked.
Seat valves can be used according to the spool symbols as well as the assigned operating pressures and flows (see chapter "Technical data" - table "Performance limits (measured with HLP46, ϑoil = 40 ±5 °C)").
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The seat arrangement offers the following options: |
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Symbol |
UK 
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CK 
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Type M-3SED 6 UK...
Throttle insert "...B"
The use of a throttle insert is required when, due to prevailing operating conditions, flows occur during the switching processes, which exceed the performance limit of the valve.
| 1) | Seal ring |
4/2 directional seat valve
With a sandwich plate, the Plus-1 plate, under the 3/2 directional seat valve, the function of a 4/2 directional seat valve is achieved.
Function of the Plus-1 plate
Initial position:The main valve is not actuated. The spring (5) holds the control spool (4) on the seat (11). Port P is blocked and A is connected to T. Apart from that, one control line is connected from A to the large area of the control spool (8), which is thus unloaded to the tank. The pressure applied via P now pushes the ball (9) onto the seat (10). Now, P is connected to B, and A to T. Transition position:
When the main valve is actuated, the control spool (4) is shifted against the spring (5) and pressed onto the seat (7). During this, port T is blocked, P, A, and B are briefly connected to each other. Spool position:
P is connected to A. As the pump pressure acts via A on the large area of the control spool (8), the ball (9) is pressed onto the seat (12). Thus, B is connected to T, and P to A. The ball (9) in the Plus-1 plate has a "positive spool overlap".
Notice:
If the annulus area of differential cylinders is not connected to port A, a pressure peak is created in port B during the switching process. This pressure peak may exceed the maximum admissible operating pressure over the permissible limit.
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The use of the Plus-1 plate and the seat arrangement offer the following options: |
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Symbol |
D 
|
Y 
|
Schematic illustration: Initial position
|
Type M-4SED 6 Y...
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| 1) | 3/2 directional seat valve |
| 2) | Plus-1 plate |
Throttle insert, check valve insert
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Throttle insert |
Check valve insert |
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The use of a throttle insert is required if, due to the operating conditions given, flows may arise during the switching processes which exceed the performance limit of the valve. Examples: Accumulator operation, use as pilot control valve with internal pilot fluid tapping.3/2 directional seat valve The throttle insert is inserted into port P of the seat valve. 4/2 directional seat valve The throttle insert is inserted into port P of the Plus-1 plate.
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The check valve insert allows a free flow from P to A and closes A to P. 3/2 directional seat valve The check valve insert is inserted into port P of the seat valve. 4/2 directional seat valve The check valve insert is inserted into port P of the Plus-1 plate.
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01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
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|
M |
– |
SED |
6 |
1X |
/ |
350 |
C |
XE |
Z2 |
/ |
|
01 |
Mineral oil |
M |
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|
02 |
3 main ports |
3 |
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4 main ports |
4 |
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03 |
Seat valve |
SED |
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04 |
Size 6 |
6 |
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Symbols |
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05 |
Main ports |
3 |
4 |
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✔ |
– |
UK |
|
|
|
✔ |
– |
CK |
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|
|
– |
✔ |
D |
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|
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– |
✔ |
Y |
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|
06 |
Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) |
1X |
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|
07 |
Operating pressure up to 350 bar |
350 |
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08 |
Solenoid, wet (wet-pin), with detachable coil |
C |
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09 |
Direct voltage 24 V |
G24 |
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Alternating voltage 230 V, 50/60 Hz |
W230R |
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For further ordering codes for other voltages and frequencies, see chapter "Technical data" |
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10 |
With concealed manual override |
N9 |
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Without manual override |
no code |
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Explosion protection |
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11 |
"Increased safety", for details see chapter "Technical data" - Table "Information on the explosion protection" |
XE |
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Electrical connection |
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12 |
Solenoid with terminal box and cable gland, for details see chapter "Electrical connection" |
Z2 |
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13 |
Without check valve insert, without throttle insert |
no code |
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With check valve insert |
P |
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Throttle Ø 1.2 mm |
B12 |
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Throttle Ø 1.5 mm |
B15 |
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Throttle Ø 1.8 mm |
B18 |
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Throttle Ø 2.0 mm |
B20 |
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Seal material |
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14 |
NBR seals |
no code |
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FKM seals |
V |
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Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) |
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Notice: |
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Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
Data sheet |
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|
Mineral oils |
HL, HLP, HLPD |
NBR, FKM |
DIN 51524 |
90220 |
|
|
Bio-degradable |
Insoluble in water |
HETG |
NBR, FKM |
ISO 15380 |
90221 |
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HEES |
FKM |
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Soluble in water |
HEPG |
FKM |
ISO 15380 |
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Important information on hydraulic fluids: For further 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.). Ignition temperature >180 °C |
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electrical
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Voltage type |
Direct voltage | AC voltage | |
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Available voltages |
V |
24 / 48 / 96 / 110 | 110 / 230 |
|
Voltage tolerance (nominal voltage) |
% |
- 5 + 10 |
|
|
Admissible residual ripple |
% |
< 5 | - |
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Duty cycle/operating mode according to VDE 0580 |
S1 (continuous operation) | ||
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Switching time according to ISO 6403 |
see table | ||
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Maximum switching frequency |
1/h |
15000 | 7200 |
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Nominal power with ambient temperature 20 °C |
W |
17 | |
|
Maximum power with 1.1 x nominal voltage and an ambient temperature of 20 °C |
W |
20.6 | |
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Protection class according to DIN EN 60529 1) |
IP66 | ||
| 1) | With correctly installed electrical connection |
Special application conditions for a safe application
Maximum ambient temperature:In case of bank assembly, as long as only one solenoid is energized at a time, and in case of individual assembly: +70 °C
In case of bank assembly, if more than one solenoids are energized simultaneously: +60 °C The maximum temperature of the surface of the valve jacket is 120 °C. This has to be considered when selecting the connection cable and/or contact of the connection cable with the surface of the jacket is to be prevented.
Switching times t in ms (installation position: solenoid horizontal)
|
Pressure p |
Flow qV |
DC solenoid |
AC solenoid |
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tON without tank pressure |
tOFF |
tON without tank pressure |
tOFF |
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UK |
CK |
D |
Y |
CK, UK |
D, Y |
UK |
CK |
D |
Y |
UK |
CK |
D |
Y |
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|
70 bar |
25 l/min |
50 |
45 |
55 |
50 |
10 |
10 |
50 |
65 |
55 |
70 |
50 |
45 |
55 |
50 |
|
140 bar |
25 l/min |
65 |
45 |
70 |
50 |
10 |
15 |
55 |
65 |
60 |
70 |
50 |
50 |
55 |
55 |
|
210 bar |
25 l/min |
75 |
55 |
80 |
60 |
10 |
15 |
65 |
65 |
70 |
70 |
50 |
55 |
55 |
60 |
|
280 bar |
25 l/min |
90 |
55 |
95 |
60 |
15 |
20 |
80 |
65 |
85 |
70 |
50 |
65 |
55 |
70 |
|
315 bar |
25 l/min |
95 |
55 |
100 |
60 |
15 |
20 |
95 |
65 |
100 |
70 |
50 |
65 |
55 |
70 |
|
350 bar |
25 l/min |
100 |
55 |
105 |
60 |
20 |
25 |
110 |
65 |
115 |
70 |
50 |
65 |
55 |
70 |
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Notice: The switching times were determined at a hydraulic fluid temperature of 40 °C and 46 mm2/s. Deviating hydraulic fluid temperatures can result in different switching times. Switching times change dependent on operating time and application conditions. |
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Performance limits (measured with HLP46, ϑoil = 40 ±5 °C)
|
Symbol |
Comment |
Operating pressure in bar |
Flow in l/min |
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|
P |
A |
B |
T |
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2-way circuit |
UK |
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With 2/2-way circuits, port P or T must be closed by the customer! |
350 |
350 |
‒ |
350 |
25 |
|
CK |
|
350 |
350 |
‒ |
350 |
25 |
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3-way circuit |
UK |
|
350 |
350 |
‒ |
350 |
25 |
|
|
CK |
|
350 |
350 |
‒ |
350 |
25 |
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4-way circuit (flow only possible in the direction of arrow!) |
D |
|
3/2 directional valve (symbol “UK”) in connection with Plus-1 plate: pP ≥ pA ≥ pB ≥ pT |
350 |
350 |
350 |
pP/pA/pB-40 |
25 |
|
Y |
|
3/2 directional valve (symbol “CK”) in connection with Plus-1 plate: pP ≥ pA ≥ pB ≥ pT |
350 |
350 |
350 |
pP/pA/pB-40 |
25 |
|
Notice
The switching power limits were established while the solenoids were at operating temperature, at 10 % undervoltage and without tank preloading.
Please observe the general notes (see chapter "Information").
(measured with HLP46, ϑoil =40 ±5 °C)
Δp-qV characteristic curves ‒ 3/2 directional seat valve
Δp-qV characteristic curves ‒ 4/2 directional seat valve
Δp-qV characteristic curves ‒ Check valve insert
Δp-qV characteristic curves ‒ throttle insert
The type-examination tested valve solenoid of the valve is equipped with a terminal box and a type-tested cable gland.
The connection is polarity-independent.
Solenoids to be connected to AC voltage are equipped with an integrated rectifier.
Notice
When establishing the electrical connection, the protective grounding conductor (PE) has to be connected properly.
Properties of the connection terminals and mounting elements
|
Position |
Function |
Connectable line cross-section |
|
1 |
Operating voltage connection |
Single-wire 0.75 … 2.5 mm2 |
|
Finely stranded,0.75 … 1.5 mm2 |
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2 |
Connection for protective earthing conductor |
Single-wire 2.5 mm2 max. |
|
Finely stranded, 1.5 mm2 max. |
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|
3 |
Connection for potential equalization conductor |
Single-wired, 4 … 6 mm2 |
|
Finely stranded, 4 mm2 |
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Direct voltage, polarity-independent |
AC voltage |
|
|
Over-current fuse and switch-off voltage peak
|
Voltage data in the valve type code |
Nominal voltage valve solenoid |
Rated current valve solenoid |
Rated current for external miniature fuse: Medium time-lag (M) according to DIN 41571 and EN/IEC 60127 |
Rated voltage of external miniature fuse: Medium time-lag (M) according to DIN 41571 and EN/IEC 60127 |
Maximum voltage value when switching off |
Interference protection circuit |
|
G24 |
24 V DC |
0.708 A DC |
800 mA |
250 V |
–90 V |
Suppressor diode bi-directional |
|
G48 |
48 V DC |
0.354 A DC |
400 mA |
250 V |
–200 V |
|
|
G96 |
96 V DC |
0.177 A DC |
200 mA |
250 V |
–370 V |
|
|
G110 |
110 V DC |
0.155 A DC |
200 mA |
250 V |
–390 V |
|
|
W110R |
110 V AC |
0.163 A AC |
200 mA |
250 V |
–3 V |
Bridge rectifier and suppressor diode |
|
W230R |
230 V AC |
0.078 A AC |
80 mA |
250 V |
–3 V |
Notice:
A fuse which corresponds to the rated current according to DIN 41571 and EN / IEC 60127 has to be connected upstream of every valve solenoid (max. 3 x Irated).
The shut-off threshold of the fuse has to match the prospective short-circuit current of the supply source.
The prospective short-circuit current of the supply source may amount to a maximum of 1500 A.
This fuse may only be installed outside the potentially explosive atmosphere or must be of an explosion-proof design.
When inductivities are switched off, voltage peaks result which may cause faults in the connected control electronics.
The voltage peak must be damped by a suitable external circuitry.
We recommend a circuitry with a suppressor diode with a limitation voltage of approx. 50 V.
3/2 directional seat valve – version “UK"
Dimensions in mm
|
|
Required surface quality of the valve contact surface |
|
1 |
Solenoid coil |
|
2 |
Concealed manual override “N9” |
|
3 |
Mounting nut with hexagon SW32 |
|
4 |
Terminal box |
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5 |
Identical seal rings for ports A, B, T; seal ring for port P |
|
6 |
Name plate |
|
7 |
Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) |
|
8 |
Port B is designed as blind counterbore |
|
9 |
Space required to remove the solenoid coil |
Valve mounting screws (separate order)
For reasons of stability, exclusively use the following valve mounting screws:
4 hexagon socket head cap screws ISO 4762 - M5 x 50 - 10.9-flZn-240h-L
(friction coefficient µtotal = 0.09 … 0.14);
material no. R913000064
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.
Notice:
Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition.
The "G...J3" versions are free from aluminum and/or magnesium and galvanized.
3/2 directional seat valve – version "CK"
Dimensions in mm
|
|
|
Required surface quality of the valve contact surface |
|
1 |
Solenoid coil |
|
2 |
Concealed manual override “N9” |
|
3 |
Mounting nut with hexagon SW32 |
|
4 |
Terminal box |
|
5 |
Identical seal rings for ports A, B, T; seal ring for port P |
|
6 |
Name plate |
|
7 |
Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) |
|
8 |
Port B is designed as blind counterbore |
|
9 |
Space required to remove the solenoid coil |
Valve mounting screws (separate order)
For reasons of stability, exclusively use the following valve mounting screws:
4 hexagon socket head cap screws ISO 4762 - M5 x 50 - 10.9-flZn-240h-L
(friction coefficient µtotal = 0.09 … 0.14);
material no. R913000064
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.
Notice:
Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition.
The "G...J3" versions are free from aluminum and/or magnesium and galvanized.
4/2 directional seat valve – version “D”
Dimensions in mm
|
|
|
Required surface quality of the valve contact surface |
Valve mounting screws (included within the scope of delivery)
For reasons of stability, exclusively use the following valve mounting screws:
4 hexagon socket head cap screws ISO 4762 - M5 x 95 - 10.9-flZn-240h-L
(friction coefficient µtotal = 0.09 … 0.14);
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.
Notice:
Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition.
The "G...J3" versions are free from aluminum and/or magnesium and galvanized.
4/2 directional seat valve, version “Y”
Dimensions in mm
|
|
|
Required surface quality of the valve contact surface |
Valve mounting screws (included within the scope of delivery)
For reasons of stability, exclusively use the following valve mounting screws:
4 hexagon socket head cap screws ISO 4762 - M5 x 95 - 10.9-flZn-240h-L
(friction coefficient µtotal = 0.09 … 0.14);
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.
Notice:
Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition.
The "G...J3" versions are free from aluminum and/or magnesium and galvanized.
Installation conditions (dimensions in mm)
|
Individual assembly |
Bank assembly |
|
|
Subplate dimensions |
Minimum dimensions: |
Minimum cross-section: |
|
Thermal conductivity of the subplate (EN-GJS-500-7) |
≥ 38 W/mK |
|
|
Minimum distance between the longitudinal valve axes |
≥ 55 |
|
Dimensions in mm
Notice:
Observe the “Special application conditions for a safe application” in chapter "Technical data".
|
1 |
Solenoid coil |
|
2 |
Concealed manual override “N9” |
|
3 |
Mounting nut with hexagon SW32 |
|
4 |
Terminal box |
|
5 |
Identical seal rings for ports A, B, T; seal ring for port P |
|
6 |
Name plate |
|
7 |
Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) |
|
8 |
Plus-1 plate |
|
9 |
Valve mounting screws |
|
10 |
Space required to remove the solenoid coil |
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