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Fortpro

Fortpro ST-4 Type Safety Valve, 250 PSI, 1/4” P.T. Inlet Replacement for Bendix 131081, Mack 691GC224 | F224601

Fortpro ST-4 Type Safety Valve, 250 PSI, 1/4” P.T. Inlet Replacement for Bendix 131081, Mack 691GC224 | F224601

SKU: F224601

Availability: More than 50 in Stock

$15.48 USD
$17.94 USD $15.48 USD
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Compatibility & Purchase Guidelines

  • Verify OEM Compatibility: Always match your OEM part number with our cross-reference list before purchasing to ensure proper fitment.
  • Avoid Returns: Do not rely solely on visual similarity. Parts may look identical but differ in specifications. Confirm compatibility using part numbers.
  • Truck Brand Reference Disclaimer: Mentioned truck brands are provided for general reference only and do not guarantee universal compatibility across all models.

Shipping Policy

In order to send your purchase, our company may use different freight companies like USPS, UPS and some 3erd Carrier Services for Oversize orders, this will not affect the final price of your order. We will send you all the information in due time. 

For Free Shipping and Freight/Oversize Shipments they are some special term you may check at our Terms & Conditions page.

 

Return Policy

If for any reason you need to return a purchased item, we have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must met the conditions stablished in our Terms & Conditions.

To start a return, you can contact us at admin@maxitrucks.com. 

Key Features & Benefits

  • Very Important: Please Verify this product Description and Compatibility before Buying
  • Built and Tested According to International Quality and Safety Standards
  • Made of Brass for Long-lasting Durability
  • Not Adjustable. Inlet Port: 1/4” P.T. Opening Pressure: 250 ± 10 PSI. Number of Vents: 2
  • Replacement for Bendix 131081 Safety Valve (ST-4 Type)
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Check Specification & Cross-references

Fortpro Logo

Fortpro is a trusted leader in the development and manufacturing of premium-quality truck parts designed to meet the demands of semi-trucks and heavy-duty trucks. Renowned for innovation, durability, and reliability, Fortpro products are engineered to enhance performance, safety, and efficiency across a wide range of trucking applications.

Whether you're seeking OEM replacement parts or upgrades, Fortpro provides a diverse selection of components backed by a global reputation for quality and innovation. Trust Fortpro for the parts you need to keep your vehicles on the road longer and stronger.

Basic Part Information6 attributes
Basic Part Information
Product LineBrakes
Category NameAir Brake Valves
Part TypeSafety Valve
Alternate Part NamePressure Relief Valve, Air Relief Valve
ModelST-4
OEM Part Number131081
Application/Fitment Attributes3 attributes
Application/Fitment Attributes
Application TypeSemi-Trucks, Heavy Duty Trucks
Inlet Port Size1/4-18 NPT
Vent SizeØ 0.281 in.
Dimensional/Physical Attributes2 attributes
Dimensional/Physical Attributes
MaterialBrass
Hex Size9/16 in.
Technical/Performance Attributes6 attributes
Technical/Performance Attributes
AdjustableNo
Closing Pressure50% of the Minimum Opening Pressure
Maximum Operating Temperature200 deg. F (93 deg. C)
Minimum Operating Temperature-40 deg. F (-40 deg. C)
Number of Vents2
Opening Pressure250 ± 10 psi
Packaging / Logistics Attributes:1 attribute
Packaging / Logistics Attributes:
Net Weight0.16 lb.
Intended Application
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.
  • Automann: 170131081
  • Bendix: 131081
  • Cummins: 3559097
  • Dayton Parts: AV131081
  • Euclid: EBN131081N
  • Haldex: KN31526
  • Mack: 691GC224
  • Meritor: R955131081N
  • Navistar-International: BX131081
  • PAI: LSV-5238
Dimensions Not Available.