New air compressor unloader pilot valve, made in the USA. This 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 125-150 PSI, it has 1/4" male NPT threads that would be used for air hook-up or screwed into the air compressor tank and has 1/8" female NPT threads on the side of the valve as shown in the picture which is the port used to control a throttle valve or cable, intake unloaders or discharge valves. 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 valves 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 there are lock-nuts holding each one in place the bottom one which is larger than the top one "you do not want to adjust" it controls the valve itself, 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. Also the aluminum lift lever on the top of the valve is a manual unloader / control lever. If lifted in straight up position it opens the valve and puts pressure to the throttle control, head unloaders or discharge valve. Click on the Technical Specs tab for more information.