With Expertise Built In, the OTR MOD 5 Trailer Spring Brake Priority Valve with Check features excellent air supply function to release the spring brakes without waiting for the compressor to refill afterward. In addition, this OTR priority valve has anti-compounding properties to eliminate damage caused by compounding and has an operating range from 40 °F (-40 °C) to 200 °F (93 °C). This heavy duty valve meets FMVSS-121 requirements, ensuring it is a safe and reliable solution to your air brake system needs. FleetPride is your First Click in Heavy Duty.