Fortpro ST-4 Safety Relief Valve – 250 PSI, 1/4″ PT Inlet for Bendix 131081 and Mack 691GC224

Description

Specifications

• Product Line: Brakes
• Category Name: Air Brake Valves
• Part Type: Safety Valve
• Alternate Part Name: Pressure Relief Valve, Air Relief Valve
• Model: ST-4
• OEM Part Number: 131081
• Application Type: Semi-Trucks, Heavy Duty Trucks
• Inlet Port Size: 1/4-18 NPT
• Vent Size: Ø 0.281 in.
• Material: Brass
• Hex Size: 9/16 in.
• Adjustable: No
• Closing Pressure: 50% of the Minimum Opening Pressure
• Maximum Operating Temperature: 200 deg. F (93 deg. C)
• Minimum Operating Temperature: -40 deg. F (-40 deg. C)
• Number of Vents: 2
• Opening Pressure: 250 ± 10 psi
• Net Weight: 0.16 lb.

Intended Application

• Used in air brake systems to protect the system from overpressure and prevent damage to pneumatic components. Its main function is to automatically release excess pressure when it exceeds a preset safe level.
• Main applications:
• -Air compressor protection:
• It is installed on an additional discharge port of the air compressor (if available) or on the discharge line close to the compressor.
• -Air brake systems in heavy vehicles.
• -Air suspension and auxiliary systems.

Cross-references

• 131081, 170131081, 3403479, 3559097, 691GC224, AV131081, BX131081, EBN131081N, KN31526, LSV-5238, LSV5238, R955131081N

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