The Humphrey 3-Port 2-Position 4-150 psi Quick Exhaust Valve is the perfect solution for controlling pressure in a variety of applications. This valve is designed to provide excellent check or flow control with the addition of a plug or orifice. It features a compact body that has a high flow capacity and its molded shuttle outperforms competitive sheet-stock types. Whether you need to control pressure in a hydraulic system or a pneumatic system, this exhaust valve is a perfect choice. FleetPride is your First Click in Heavy Duty®.