Rolair 131B Pilot Unloader Valve 110-135 PSI Gas / Electric Compressors

This listing is for a genuine OEM Rolair 131BIG Pilot Unloader Valve, designed as a direct factory replacement for select Rolair air compressor models. Built to original specifications, this valve helps maintain proper pressure cycling and reliable system performance. The valve features a 1/4" Male NPT thread for the tank connection and a 1/4" Female NPT unloader port. It also includes an optional 1/8" Female NPT throttle control port. The valve is factory preset to activate the compressor at 110 PSI and shut it off at 135 PSI, ensuring safe, efficient operation. Manufactured from durable brass, this high-quality OEM part is built to withstand demanding environments and long-term use. Key Features:• Genuine OEM Replacement• Tank Connection: 1/4" Male NPT Threads (connects securely to compressor tank).• Unloader Port: 1/4" Female NPT Threads (for unloader line connection).• Throttle Control Port: 1/8" Female NPT (optional use if throttle control is needed).• Cut-In: 110 PSI• Cut-Out: 135 PSI• Durable Brass Construction: Built for high durability and corrosion resistance.• Easy Installation: Standard connection sizes make installation straightforward. Compatible Rolair Models:• 3230K30CS• 5230K30CS• 8230HK30• 4090HK17/20• 6590HK18/20• 7722HK28/20• 11GR Series• 13GR Series• 18GR Series This OEM pilot unloader valve is ideal for restoring proper operation and maintaining peak performance in your Rolair compressor. Whether you're performing routine maintenance or replacing a worn-out component, this valve offers a perfect factory fit.