Bosch Rexroth 4WH 10 Q4X/ hydraulic directional valve
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Directional spool valve

Bosch Rexroth 4WH 10 Q4X/ hydraulic directional valve
Model: 4WH 10 Q4X/ · Bosch Rexroth
Maximum pilot pressure (bar)250
Catalog pressure-flow conditionsUse exact size/spool pressure-flow curves and minimum pilot-pressure table. Separate main P/A/B, tank T and pilot X/Y limits apply; no universal maximum-flow value is assigned.
Actuation typeHydraulic
Maximum tank-port pressure (bar)280
Number of ports4
Mounting typeSubplate mounting
Full specifications ↓ Technical catalog · PDF

Description

4WH 10 Q4X/, manufacturer material number R900538177, is a Bosch Rexroth pilot-operated directional spool valve with hydraulic actuation, factory size code 10, nominal size 10 and spool symbol Q. The main spool controls flow direction; the pilot circuit moves the main spool.

Main-stage pressure, tank pressure and pilot pressure are independent. External pilot circuits require protection; internal pilot supply may require the specified pressure-reducing arrangement. Pressure–flow curves and minimum pilot-pressure requirements apply to the exact spool. Internal leakage is inherent to the spool design.

The mounting interface is a subplate pattern, not a threaded fluid fitting. Subplates and mounting screws are separately selected; the original pages show the applicable interfaces and installation requirements.

Representative manufacturer illustration of WH and WEH pilot-operated variants; size, spool and actuation details may differ.

Full specifications

Technical specifications
Component type Directional spool valve
Maximum pilot pressure (bar) 250
Maximum pilot-return pressure (bar) 250
Maximum tank-port pressure (bar) 280
Maximum working-port pressure (bar) 280
Catalog pressure-flow conditions Use exact size/spool pressure-flow curves and minimum pilot-pressure table. Separate main P/A/B, tank T and pilot X/Y limits apply; no universal maximum-flow value is assigned.
Actuation type Hydraulic
Number of ports 4
Port pattern ISO 4401-05-05-0-05
Mounting type Subplate mounting
Series 4X
Catalog rating conditions Main-stage pressure, tank pressure and pilot pressure are independent. External pilot circuits require protection; internal pilot supply may require the specified pressure-reducing arrangement. Pressure–flow curves and minimum pilot-pressure requirements apply to the exact spool. Internal leakage is inherent to the spool design.
Control code WH
Factory model code 4WH 10 Q4X/
Manufacturer Bosch Rexroth
Manufacturer part number R900538177
Pilot oil return External via Y
Pilot oil supply External via X
Product family WH
Spool return Spring centering/return
Spool symbol Q
Factory size code 10
Nominal size 10
Technical specifications
Number of positions 3
Technical specifications
Seal material NBR