Back-Flushing Valves - Dorot Control Valves
Back-Flushing Valves - Dorot Control Valves
Back-Flushing Valves - Dorot Control Valves
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Models 57 / 58 (“FlushGAL”)<strong>Back</strong>-<strong>Flushing</strong> <strong>Valves</strong>Operating principle:Filtration modeDe-pressurized command - control chamber vents toatmosphere:The valve allows straight flow. Bottom drain plug is closed.Ventedcontrol chamber<strong>Back</strong>-<strong>Flushing</strong> modePressure command - control chamber is pressurized:The valve inlet port is closed by the diaphragm and thebottom port opens to allow flow from the filter, out to the drain.Pressurizedcontrol chamberInletTo filtersInletFrom filtersDrainTo DrainDimensions:5758Inlet / Outlet Drain Dimensions mm / inch WeightKg / Lbsmm inch mm inch A B C80 3 50 2 289 / 11 3 / 8 158 / 6 1 / 4 176 / 6 15 / 16 22 / 48100 4 80 3 309 / 12 3 / 16 163 / 6 7 / 16 186 / 7 5 / 16 25 / 5580 3 50 2 287 / 11 5 / 16 152 / 6 175 / 6 7 / 8 22 / 48100 4 80 3 323 / 12 11 / 16 167 / 6 9 / 16 194 / 7 5 / 8 15 / 33BModel 57AEnd connections:Inlet / Outlet portsDrain portsIn 4x3 modelsFlange standardsThread standardsModel 57 - FlangedModel 58 - GroovedGrooved or Female-threadedInternal 3” (80mm) thread and externalGrooved 4” (100mm) connectionISO 2084 / ANSI B16 / BSTD (others onrequest)Female NPT / BSPCModel 58ABC11updated 01/2012
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