Bosch Rexroth M-4SEW6D3X/630MG24N9K4/B15 4/2 directional seat valve

M-4SEW6D3X/630MG24N9K4/B15, manufacturer material number R900616726, is a Bosch Rexroth size 6, 4/2 directional seat valve with direct solenoid actuation and spring return. Symbol D gives de-energized flow paths: P to A; B to T; when energized: P to B; A to T.

The G24 coil is rated 24 V DC, with a 30 W catalog power consumption and 100 % duty cycle. K4 uses a DIN EN 175301-803 connector; the mating connector is separately ordered. N9 identifies the concealed manual override. The seal execution is NBR. The port P throttle insert has a documented diameter of 1.5 mm.

For the documented circuit, P, A and B are limited to 630 bar and T to 100 bar. The maximum catalog flow is 25 L/min, subject to the circuit pressure inequalities and original performance conditions. The four-way circuit requires pP > pA ≥ pB > pT. Its Plus-1 stage requires at least 8 bar and flow strictly above 3 L/min; correct cylinder connections are needed to avoid pressure intensification. Port T must remain connected; ports must not be arbitrarily exchanged or closed.

During the four-way switching transition, T is closed while P, A and B briefly connect. The main seat stage and Plus-1 plate have different overlap behavior. Seat closure does not eliminate transient switching flow. Performance data use HLP46 oil at 40 ± 5 °C, solenoids at operating temperature, 10 % undervoltage and no tank preloading. Any fitted throttle and the actual pressure distribution influence usable flow.

The manufacturer technical reference is RE22058/2013-06, edition 2013-06. Representative manufacturer SEW6 four-way cutaway. The source illustrates symbol Y; the selected symbol D flow paths are defined separately, not inferred from this cutaway.