In-line check valve is mounted between the strainer and meter assembly to help increase air eliminator efficiency by creating additional back pressure and help reduce the reverse back flow.
757 Differential Pressure Valve
The diaphragm differential pressure control valve has a normally closed, spring loaded design. Provides a constant 15 PSI differential pressure and controls flow when vapor is sensed. Security and 2-stage solenoid valves are available upon req [...]
655 Electronic Control Valve
A normally closed two-stage diaphragm preset valve for use with electronic relay control. Stainless steel or brass pilot valves are available. Dimensionally interchangeable with the 650 Hydraulic Preset Valves.