Williams Pressure Regulating Valves

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Part Number:
Pressure Regulating Valves
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Pressure Regulating Valves

 

Part Number   Stock Code
Description
WM778A
15292
Does not include In-Line Filter
WM778A1
15293
Includes In-Line Filter
WM783A
15330
Control Valve - 4 Way - 3 Positive Safety LO
WM787F
15305
Regulating Controller - 4 Way - 3 Positive
WM279E1
15163
Pressure Regulator - Self Relieving
WM279R2
15165
Pressure Regulator - Self Relieving
WM43B1
15225
Pressure Regulator -Non Relieving
WM118365
15477
WM778-100 Pressure Protection Valve-1/8 Inlet Port.

 

WM778 Series

Application: The WM778 series are normally closed pressure protection valves often used when an auxiliary system is supplied off a primary system. The valve will protect the primary air brake system from failure by automatically re-closing at 70 psi.  

  • Normally closed valve until a pressure of 70 psi is reached
  • Valve will automatically close if pressure drops below 70 psi in compliance with the latest revisions to FMVSS121
  • (2) 1/4” NPT ports
  • Max operating pressure: 150 psi
  • Operating temperature range: -40F to 180F

 

WM783A Series

Application: The WM783A series valve is a non-compensating four-way control valve with three functional positions. They are equipped with a spring loaded lockout safety device which locks the control lever in each of the three positions to prevent unintentional movement. 

  • Flow Rating: 15 SCFM @ 100 psi
  • 1/8” NPTF ports
  • Max operating pressure: 150 psi
  • Operating temperature range: -20F to 200F

 

WM279 Series

Application: The WM279 series valves are self-relieving pressure regulators that are available with either hex screw (WM279E1) or knob (WM279R2) for output adjustment. The operator regulates the output level by manually changing the position of the knob or screw. Both models maintain a constant output within the regulator's pressure range.

  • Flow Rating: 70 SCFM @ 100 psi
  • 1/4” NPTF ports
  • Max operating pressure: 150 psi
  • Operating temperature range: -20F to 200F

 

WM43B Series

Application: The WM43B series are designed to maintain downstream pressure at the desired level. They are used in industrial and vehicular applications which require non-exhausting pressure regulator, and are commonly used to govern supply pressure to pneumatic accessories and equipment. The WM43B are ideal for limiting air supply to transmission shifters and other devices which consume air.

  • Flow Rating: 40 SCFM @ 100 psi
  • 1/4” NPTF ports
  • Max operating pressure: 150 psi
  • Operating temperature range: -20F to 200F
  • Adjustable output range 0 - 80psi

 

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