| 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. |
| Cross References | 131081, 170131081, 3403479, 3559097, 691GC224, AV131081, BX131081, EBN131081N, KN31526, LSV-5238, LSV5238, R955131081N |
| 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.
|
