Brand new air compressor unloader pilot valve, made in the USA. The valve is used to operate a compressed air system at a constant run with a preset pressure operating range to actuate throttle controls, intake unloaders, or air-actuated discharge valves. The valves preset operating range is 145-175 PSI, it has 1/4" male NPT threads that would be used for air hook-up or screwed into the compressor tank and has 1/8" female NPT threads on the side of the valve (as shown in the picture). The 1/8" threads are the port used to control a throttle, intake unloaders, or discharge valve. If more than one outlet is needed it is common to use a "tee" to make multiple ports which can be purchased at a local hardware store.

Air Compressor Unloader Control Pilot Valve 145-175 PSI Brass USA
Item Description

Air Compressor Unloader Control Pilot Valve 145-175 PSI Brass New

Air compressor unloader pilot valve, made in the USA. The valve is used to operate a compressed air system at a constant run with a preset pressure operating range to actuate throttle controls, intake unloaders, or air-actuated discharge valves. The valves preset operating range is 145-175 PSI, it has 1/4" male NPT threads that would be used for air hook-up or screwed into the compressor tank and has 1/8" female NPT threads on the side of the valve (as shown in the picture). The 1/8" threads are the port used to control a throttle, intake unloaders, or discharge valve. If more than one outlet is needed it is common to use a "tee" to make multiple ports which can be purchased at a local hardware store.

This valve's preset pressure can be adjusted, below the manual unloader lever on the top of the valve, there are two screw settings that can be adjusted. The bottom one, which is larger than the top one, controls the valve itself DO NOT ADJUST THE BOTTOM. The top one, which is the smaller one, right below the manual lift lever, controls the pressure setting, when screwed in it will INCREASE both cut-in and cut-out pressure and when screwed out it will DECREASE both cut-in and cut-out pressure, it is not recommended to be adjusted more than about 15 PSI in either direction.

Features & Specifications:

• Operating Pressure: 145-175 PSI
• Max Operating Temperature: 300° F
• Max Operating Pressure: 200 PSI
• Air Inlet Threads: 1/4" Male NPT (measures about 1/2" diameter)
• Air Outlet Threads: 1/8" Female NPT (measures about 3/8" diameter)

If lifted in a straight-up position it opens the valve and puts pressure on the throttle control, head unloaders, or discharge valve.

This valve is precision machined and all brass construction with a stainless steel mesh filter on the intake side of the valve for a dirt-free operation.

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Welcome to Compressor Source.

Founded in 1979 in Lincoln, Nebraska, our business has over 45 years of experience in the air compressor industry. Compressor Source was launched in 2008 to bring our trusted knowledge and customer service online.

We specialize in air compressors, compressor parts, and accessories, offering a wide selection of OEM and universal components for both professional and DIY applications. Our team is committed to fast shipping, U.S.-based customer support, and reliable products you can count on.

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