Pilot Operated

The Bosch Rexroth range of pilot operated valves is suitable for flow rates of up to 1 100 litres per minute, and is available with 2 types of actuation, namely electrohydraulic and hydraulic.

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Directional Valve - Pilot Operated Specifications

 

3/2, 4/2 and 4/3 Directional Valves, Internally or Externally Pilot Operated | Types 4WEH and 4WH (NG10 to NG32)

 

  • 2 types of actuation: Electrohydraulic (type WEH) and Hydraulic (type WH)
  • Maximum operating pressure 350 bar [5076 psi]
  • Maximum flow 1 100 l/min [290 US gpm]
  • For subplate mounting
  • Porting pattern to ISO 4401 and NFPA T3.5.1 R2
  • Spring- or pressure-centering, spring end position or hydraulic end position
  • Wet-pin DC or AC voltage solenoids, optional
  • Manual override, optional
  • Electrical connection as individual or central connection
  • Switching time adjustment, optional
  • Pre-load valve in channel P of main valve, optional
  • Stroke adjustment of main spool, optional
  • Stroke adjustment and/or end position control, optional
  • Inductive position switches and proximity sensors (contactless)

 

4/2 and 4/3 Directional Shut-Off Valves, Internally or Externally Pilot Operated | Types Z4WEH and Z4WH (NG10)

 

  • 2 types of actuation: Electrohydraulic (type WEH) and Hydraulic (type WH)
  • Maximum operating pressure 315 bar
  • Maximum flow 160 l/min
  • Directional spool valve, pilot operated
  • Function as shut-off through-valve or shut-off/through valve/short-circuit valve
  • Free flow in P and T in every spool position
  • Porting pattern to ISO 4401-05-04-0-05
  • Wet-pin DC or AC voltage solenoids, optional
  • Manual override, optional
  • Electrical connection as individual or central connection
  • Switching time adjustment, optional
  • Stroke adjustment of main spool, optional
  • Inductive position switch and proximity sensors (contactless)

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