3/2 and 4/2 directional poppet valve with solenoid actuation, type M-SED6.. L1X

Function and configuration

M-3SED6 are directional poppet valves with solenoid actuation. They control the start, stop and direction of flow.

The directional valve mainly consist of housing (1), solenoid (2), valve seats (7) and (11) and closing element (4). With the help of manual override (6) the valves can be operated without energisation of the solenoid.

General principle (3/2 directional poppet valve):

The initial position of the valve (normally open "UK" or normally closed "CK") is determined by the arrangement of the spring (5).

Chamber (3) behind closing element (4) is connected to port P and closed towards port T. The valve is therefore pressurebalanced with regard to the actuating forces (solenoid and spring).

Due to the special closing element (4) ports P, A and T can be pressurized to the maximum operating pressure (350 bar), and the flow can be directed in both directions (see symbols)!

In the initial position, closing element (4) is pressed by the spring (5) onto seat (11), in the shifted position, it is pushed by the solenoid (2) onto seat (7). The flow is leak-free blocked.

M-4SEW6 4/2 directional poppet valve

In conjunction with a sandwich plate, the Plus-1 plate, under the 3/2 directional poppet valve, the function of a 4/2 directional poppet valve can be realized.

1). Initial position:

The main valve is not operated. Spring (5) holds closing element (4) on seat (11). Port P is blocked, and A is connected to T. A pilot line is provided from A to the large area of pilot spool (8), which is therefore unloaded to tank. The pressure applied via P now shifts ball (9) onto seat (10). This opens the connection from P to B and A to T.

2). Transition position:

When the main valve is operating, closing element (4) is shifted against spring (5) and pressed onto seat (10). This results in closing of port T, while P, A and B are briefly connected.

3). Switching position:

P is connected to A. Since the pump pressure acts via A on the large area of pilot spool (8), ball (9) is pressed onto seat (12). B is therefore connected to T, and P to A. Ball (9) in the Plus-1 plate has a "positive overlap".

Cartridge type orifice plug (model M-.SED6.L1X/...)

For the work status of the valve during switching process, the flow may be over the value permitted by the valve performance limit curve; in this case, a cartridge orifice plug is necessary.

The orifice plug is installed in port P.

Cartridge check valve (model M-.SED6.L1X/...)

Cartridge check valve allows the oil flows from P to A freely with no leaks from A to P.

One-way valve is installed on port P.

Spool symbols

Ordering code

Technical data

Electrical data

Characteristic curves (Measured at oil =40°C +5°C,using HLP46)

11

Unit dimensions

M-3SED6 CK/UK-L1X/...solenoid directional poppet valve

Unit dimensions

M-4SED6 D/Y-L1X/..solenoid directional poppet valve