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GEOFLOW, INC http://www.geoflcom/wastewater/Operations%20a... 9. FILTER FLUSH VALVES Used to flush debris from the filter cleanout port back to the pretreatment tank, this can be an electronically activated solenoid valve or a manual ball valve. If manual, it should be opened for a full flushing at least every six months and left cracked open slightly to flush continuously. Cracking open a manual valve may be used to increase flow through.the system to be within the efficient flow rate of the filter and/or pump, if necessary. Certain States may require automated electronic flushing. Please refer to your State codes. Flush valve specification and description The Solenoid Valve is electrically operated and used to flush the drzpfield and Vortex filter. It is normally closed, and in the event of a power failure the valve closes. Unique Dual Ported Diaphragm greatly minimises clogging. In operation, the diaphragm ports constantly flex, inhibiting sand, silt and debris from blocking the valve action. The porting design also permits equal pressure on both sides of the diaphragm wall, regardless of linepressure when valve is not operating, and nearly equalpressure across the wall when operating. The DWl Valve diaphragm is made of nylon fabric reinforced Buna-N rubber;agrooved rib interlocks with cover and body to prevent leakage. Nylon exhaust orifice is non-corrosive and has an opening sided larger than the diapbragm ts so that any pieces of sand or silt passing through the diaphragm will not be trapped beneath the solenoid actuator. The solenoid is constructed of molded epoxy resin having no carbon steel components exposed thereby eliminating possible external corrosion and deterioration. Solenoid is completely waterproof, with an O-ring seal, and complies with NEC Class II circuit requirements for 24V ax. operation (also operates on 12 volts d.G up to 75 psi. The actuator is t floe coated stainless steel and brass with a molded-in place rubber exhaust port seal;a stainless steel spring assures positive seating. High strength plastic glass-filled body and cover designed to operate in heavy duty commercial applications. Stainless steed%4 j inch cover bolts and mating brass body inserts make re-assembly easy. Shock cone on diaphragm seat eliminates water hammer in all except extreme cases Flow control. A brass, non-rising type flow control stem for throttling the valve from full open to close positions. Manual bleed lever. An easy-to-use, hand operated control bleeds valve to downstream;has stags for open and closed positions. Cold water working pressure: 150 psi 10. FIELD FLUSH VALVES. Used to flush out fine particles which have passed through the filter and accumulate on the bottom of the tube at the end of each lateral. The field flush valve can be manual or electronic. If manual, it should be opened for full flushing at least every i six months and left cracked open slightly to flush continuously and provide for drainage of the flush line in freezing conditions. Cracking open a manual valve can also be used to increase the flow through the system to be within the efficient flow rate of the filter and/or pump if necessary. Certain States do require automated electronic flushing. Please refer to your State codes. Flush valve specification and description of 12 0ii nPnnnll n.Cn r� r