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PS Series Solenoid Valves are pilot-operated, 2- way, normally-closed valves. They require a minimum line pressure and minimum differential pressure to open and close. When the solenoid coil is de-energized, upstream pressure atop the diaphragm holds the valve closed. When the coil is energized, flow through the pilot valve creates a pressure difference across the diaphragm which opens the main valve orifice. These valves have 11-watt coils and can be energized continuously. Although these valves are normally-closed, positive, leak tight sealing requires a small inlet pressure. A minimum inlet pressure of 5 PSI is recommended. These valves should open fully at 5 PSI differential and higher. "PS" valves have very high Cv-factors. If process flow rates do not maintain 5 psid, the valve will not stay fully open, which means the pressure drop may be higher and the Cv-factor lower than anticipated. This should not adversely affect valve performance. Series PS automatically shuts off flow of highly corrosive and ultra-pure liquids. They can handle acids, caustics, solvents, chlorine solutions, sodium solutions, deionized water, reverse osmosis water, brewery processes, etc. as long as a 5 psi differential is maintained. Series PS is not suitable for solutions containing particulate matter or solutions that tend to precipitate solids. High pressure: Particularly for applications where high back-pressures (up to 70 PSI) are required e.g. controlling flow spray nozzles, high pressure chemical injections, etc. Inlet pressure to 140 PSI. Patented Fail-Dry safety design feature provides advance visual warning if seal malfunctions, while permitting valves to continue operating until maintenance can be scheduled. Cycle life in excess of 1,000,000 cycles. Energy-efficient 11 watt coil. Molded coil and standard DIN connector; designed to meet NEMA 4X. Body material: Polypropylene.
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