Heavy-duty Hippo piston valves provide remote automatic on/off operation in pressures of 10,000, 20,000, and 30,000 psi with orifice sizes of 7⁄16, 9⁄16, and 11⁄16 in. They can be controlled by an air regulator, electric solenoid, or manual low-pressure valve in air supply line. Normally open valves require 45, 50, and 55 psi to seat the valve. Normally closed valves require 35, 45, 50, and 55 psi to unseat the valve and 60, 70, 85, and 95 psi to fully open the valve.

High Pressure Equipment Co., (814) 838-2028, www.highpressure.com