Bosch Rexroth 4WH22R7X/ hydraulic directional valve
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Directional spool valve

Bosch Rexroth 4WH22R7X/ hydraulic directional valve
Model: 4WH22R7X/ · Bosch Rexroth
Maximum pilot pressure (bar)210
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)250
Number of ports4
Mounting typeSubplate mounting
Full specifications ↓ Technical catalog · PDF

Description

4WH22R7X/, manufacturer material number R900408504, is a Bosch Rexroth pilot-operated directional spool valve with hydraulic actuation, factory size code 22, nominal size 25 and spool symbol R. 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) 210
Maximum pilot-return pressure (bar) 210
Maximum tank-port pressure (bar) 250
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 4401-08-08-0-05
Mounting type Subplate mounting
Series 7X
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 4WH22R7X/
Manufacturer Bosch Rexroth
Manufacturer part number R900408504
Pilot oil return External via Y
Pilot oil supply External via X
Product family WH
Spool return Spring centering/return
Spool symbol R
Factory size code 22
Nominal size 25
Technical specifications
Number of positions 3
Technical specifications
Seal material NBR