Safety valves are used in air brake systems to protect against excessive pressure buildup. They include a warning sound.
Unlike the ST-1 model, the ST-3 and ST-4 valves are not adjustable in terms of pressure levels or in port sizes.
The maximum pressure in the system allowed by government regulations is 150 PSI.
- ST-3 Style.
- Automatic pressure release at 150 psi.
- 1/4" NPT.
May also Work as a Replacement for Part: Automann 170.284142, Bendix 284142, Bendix 284142N, Dayton AV284142, Euclid E-BN284142N, Haldex KN31200, Keene K284142, Newstar S-7656, Velvac 030075, WA284142.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).