Rexroth Solenoid Valve
Rexroth Valve M-3SED
  • Description
  • Technique Feature
  • Specification
  • Applied Range

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Data Sheet of M-SED 6 Series

Data Sheet of M-SED 10 Series

REXROTH Type Code of M-3SED Series

 

 

M-.SED 6 Product description

4/2 directional seat valve

2/2 and 3/2 directional seat valve

General

The directional valve of the type M-.SED is a direct operated directional seat valve with solenoid actuation. It controls the start, stop and direction of flow and mainly consists of a housing (1), the solenoid (2), the valve seats (7) and (11) as well as of the closing element (4).

The manual override (6) allows for the switching of the valve without solenoid energization.

Basic principle (3/2 directional seat valve)

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 closing element (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).

With the special closing element (4), ports P, A and T can be loaded with the maximum operating pressure (350 bar) and the flow can be directed into both directions (see symbols)!

In the initial position, the closing element (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.

With the 2/2 directional seat valve, the tank port is internally closed.

2/2 directional seat valve

3/3 directional seat valve

„PK“

 

„UK“

 

 

„NK“

 

„CK“

 

 

Type M-3SED 6 UK1X/350CG24N9K4 (top) / type M-3SED 6 CK1X/350CG24N9K4 (bottom)

 

4/2 directional seat valve

2/2 and 3/2 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 operated. The spring (5) holds the closing element (4) on the seat (11). Port P is blocked and A is connected to T. A 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). Thus, P is connected to B and A is connected to T.

- Transition position:

Upon actuation of the main valve, the closing element (4) is shifted against the spring (5) and pressed onto the seat (7). During this, port T is blocked, while P, A, and B are briefly connected to each other.

- Switching position:

P is connected to A. Since 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”.

 

Attention!

In order to avoid pressure intensification when using differential cylinders, the annulus area of the cylinder must be connected at A.

The use of the Plus-1 plate and the seat arrangement offer the following options:

Symbol “D”

 

Symbol “Y”

 

 

 

Type M-4SED 6 Y1X/350CG24N9K4

 

Throttle insert

The use of a throttle insert is required if, due to prevailing operating conditions, flows which exceed the performance limit of the valve can occur during the switching processes.

Examples:

- Accumulator operation,

- use as pilot control valve with internal pilot fluid tapping.

2/2 and 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

 

Check valve insert

The check valve insert allows a free flow from P to A and closes A to P in a leak-free form.

 

2/2 and 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.

 

 

M-.SED 10 Product description

3/2 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 operated. The spring (5) holds the closing element (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:

Upon actuation of the main valve, the closing element (4) is shifted against the spring (5) and pressed onto the seat (7). During this, port T is blocked, while P, A, and B are briefly connected to each other.

- Switching position:

P is connected to A. Since 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”.

General

The directional valve of the type M-.SED is a direct operated directional seat valve with solenoid actuation. It controls the start, stop and direction of flow and mainly consists of a housing (1), the solenoid (2), the valve seats (7) and (11) as well as of the closing element (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 closing element (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).

With the special closing element (4), ports P, A and T can be loaded with the maximum operating pressure (350 bar) and the flow can be directed into both directions (see symbols)!

In the initial position, the closing element (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 in a leak-free manner.

Version “UK”

 

Version “CK”

 

Type M-3SED 10 UK1X/350CG24N9K4 
Type M-3SED 10 CK1X/350CG24N9K4

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 operated. The spring (5) holds the closing element (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:

Upon actuation of the main valve, the closing element (4) is shifted against the spring (5) and pressed onto the seat (7). During this, port T is blocked, while P, A, and B are briefly connected to each other.

- Switching position:

P is connected to A. Since 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”.

General

The directional valve of the type M-.SED is a direct operated directional seat valve with solenoid actuation. It controls the start, stop and direction of flow and mainly consists of a housing (1), the solenoid (2), the valve seats (7) and (11) as well as of the closing element (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 closing element (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).

With the special closing element (4), ports P, A and T can be loaded with the maximum operating pressure (350 bar) and the flow can be directed into both directions (see symbols)!

In the initial position, the closing element (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 in a leak-free manner.

Attention!

In order to avoid pressure intensification when using differential cylinders, the annulus area of the cylinder must be connected at A.

The use of the Plus-1 plate and the seat arrangement offer the following options:

Version “D”

 

Version “Y”

 

Type M-4SED 10 Y1X/350CG24N9K4

 

Throttle insert

The use of a throttle insert is required if, due to prevailing operating conditions, flows which exceed the performance limit of the valve can occur during the switching processes.

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

 

Check valve insert

The check valve insert allows a free flow from P to A and closes A to P in a leak-free form.

 

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.

 

M-.SED 6 Technical data

general

Size

6

Weight

2/2 directional seat valve

kg

1.5

3/2 directional seat valve

kg

1.5

4/3 directional seat valve

kg

2.3

Installation position

 

 

any

Ambient temperature range

NBR seals

°C

-30 … +50

FKM seals

°C

-20 … +50

 

 

 

M-.SED 10 Technical data

general

Size

10

Weight

3/2 directional seat valve

kg

2.6

4/2 directional seat valve

kg

3.9

Installation position

 

 

any

Ambient temperature range

NBR seals

°C

-30 … +50

FKM seals

°C

-20 … +50

 

M-.SED 6 Features

Direct operated directional seat valve with solenoid actuation

Porting pattern according to DIN 24340 form A (without locating hole)

Porting pattern according to ISO 4401-03-02-0-05 and NFPA T3.5.1 R2-2002 D03 (with locating hole)

Safe switching also with longer standstill periods under pressure

Wet-pin DC solenoids with detachable coil (AC voltage possible by means of a rectifier)

Solenoid coil is rotatable by 90°

The coil can be changed without having to open the pressure-tight chamber

Electrical connection as individual connection

With concealed manual override, optional

Inductive position switch (contactless)

 

 

M-.SED 10 Features

Direct operated directional seat valve with solenoid actuation

Porting pattern according to ISO 4401-05-04-0-05 and NFPA T3.5.1 R2-D05

Subplates (separate order)

Blocked connection is leak-tight

Reliable switching when under pressure over longer periods of standstill

Wet-pin DC solenoids with detachable coil (AC voltage possible by means of a rectifier)

Solenoid coil is rotatable by 90°

The coil can be changed without having to open the pressure-tight chamber

Electrical connection as individual connection

With concealed manual override, optional

Inductive position switch and proximity sensors (contactless)

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