Solenoid Valves - HAYWARD Industries, Inc. - #4

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TROUBLE SHOOTING SHOULD THE SOLENOID VALVE FAIL TO OPERATE AS EXPECTED, CHECK THE FOLLOWING:: 1. VALVE WILL NOT OPEN : a) Check electrical supply and connections. Be sure valve supplied is rated with the correct voltage b) Inlet pressure is too high. (exceeds 120 PSIG) c) Solenoid coil is burned out. (typically the result fluid leaking into the coil from ruptured diaphragms caused by excessive dirt in the process, or the result of water hammer). d) Valve orifice clogged. 2. VALVE WILL NOT CLOSE : a) System has a flow restricting device installed downstream inducing high backpressure (i.e. spray nozzle, partially closed valve, etc.) b) Piston seal is worn. Replace cartridge assembly. c) Valve orifice is clogged. d) Valve installed backwards. Check flow direction. e) Line velocity too high. (exceeds 5 F.P.S.) f) Diaphragms failed. IS1100SV Rev D 8/31/99 ECR 819R

pageCatalog pdf di En 2012-05-19-10