Bosch Rexroth | H-4WH32HT6XV
H-4WH32HT6X//V
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The H-4WH32HT6X//V valve is produced by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow in automation systems where fast, pressure-centered switching is required. Actuation is hydraulic, so a pilot circuit shifts the spool without electrical solenoids. The way configuration is 4-way, and the spool is identified by symbol T to manage two service lines plus pressure and tank ports. A nominal size of NG32 defines the passage dimensions and relates directly to the achievable flow capacity. The porting pattern follows ISO 4401-10-09-0-05, allowing the valve to mount on standardized subplates. FKM seals are fitted to withstand the specified media and temperatures. With FKM sealing, permitted fluid temperature ranges from −15 °C to +80 °C.
The main flow paths tolerate operating pressures up to 350 bar at ports P, A, and B. Port T is limited to a maximum of 250 bar to protect return-line components. When the supply reaches 350 bar, the valve can pass up to 680 l/min under pressure-centered conditions. Reliable spool centering requires a pilot pressure of at least 8.5 bar. The pilot circuit itself may be run as high as 250 bar without overstressing internal passages. Achieving the shortest response time calls for a pilot flow of 45 l/min. During a full 0 → A transition the spool cavity receives 14.4 cm³ of pilot oil. System oil must meet cleanliness class ISO 4406 20/18/15 to protect the precision surfaces inside the valve.
Technical Specifications
Actuation Type
Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Max Flow @350 Bar (pressure-centered)
680 l/min
Max Fluid Temperature (fkm)
+80 °C
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Max Pressure At Port T
250 bar
Min Fluid Temperature (fkm)
-15 °C
Min Pilot Pressure (pressure-centered)
8.5 bar
Nominal Size
NG32
Pilot Flow For Fastest Switching
45 l/min
Pilot Volume 0->a (pressure-centered)
14.4 cm3
Porting Pattern
ISO 4401-10-09-0-05
Seal Material
FKM
Spool Symbol
T
Way Configuration
4-Way
1620 Old Apex Road
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