TThomas Pumphe Thomas 118Z Series pressure/vacuum oil-less diaphragm pump provides mobility with a quiet, efficient low-vibration design that utilizes a lightweight nylon housing and end cap that limits the pump’s weight to 4.4 lbs. (1.99 kg)—all combined with a long-life 24V brushless DC motor. Specifically designed for fuel cell applications, the 118Z series also features permanently lubricated bearings, stainless steel valves, all wetted aluminum parts treated for corrosion protection and is designed to meet agency requirements. Maximum continuous pressure is rated to 20 PSI (1.38 bar) and maximum vacuum to 75 percent local barometer (-745 mbar). – gd-thomas.com