Product Details: The Bendix 1/2"-14 NPT Inlet Port 250 ± 10 psi ST-4 Safety Valve is designed to provide pressure relief in a system when the pressure exceeds a predetermined set point. This valve is made of brass and stainless steel for superior durability and is highly resistant to rust and corrosion. It is typically designed as a spring-loaded valve, ensuring reliable performance and long-lasting use. This valve is perfect for any system that needs to maintain a safe pressure level. FleetPride is your First Click in Heavy Duty®.