Perry VP-30 Regulating Pump (glow Fuel)

This pump is constructed so that it draws fuel from the tank, passes it through a precision regulator section, then to the carburettor. Correct pressure to the carburettor is adjusted by the Hex regulator adjustment screw on the plastic end of the pump. To increase fuel flow the screw is turned in, to decrease turn the screw out. The pump is energized by engine crankcase pressure.
The built in regulator supplies fuel to your engine with no variation in pressure regardless of fuel level in the tank or its location. Absolute efficiency maintained at all times - never to lean or rich! For aeroplane, helicopter, boat or car.

The VP-30 regulating pump is capable of performing like no other fuel delivery system. It delivers an ideal .25 PSI to any model carburetor from a .15 to a 3.0 cu.in. engine. The pressure remains constant throughout the entire speed range, making the carburetor adjustment easy and simple. Once the needle valve is adjusted, the mixture will not vary regardless of how low the fuel or the attitude of the airplane, thus eliminating rich/lean runs altogether.