Watts LF23B Series Instructions For Installing

Watts LF23B Series Instructions For Installing Manual pdf 1 page image

Instructions for Installing Series LF23B,LF123LP, LFN250 and LFN250BWater Pressure Reducing ValvesInstall Valve in the line with arrow on valve body pointing in thedirection of flow.This valve should be installed where it is accessible with suf-ficient clearance for cleaning, service or adjustment. Installthe reducing valve, when possible, before the sill cock line asshown in diagram. Before installing the reducing valve, flush outthe line to remove loose dirt and scale which might damagevalve disc and seat.Horizontal installation is recommended. However, valve can beinstalled in a vertical position. Regulator must be installed in anaccessible location to facilitate servicing the regulator.To readjust reduced pressures, loosen adjusting screw nut andturn adjusting screw clockwise to raise reduced pressure andcounterclockwise to lower reduced pressure.When reducing valve is used, it makes a closed system;therefore, pressure relief protection must be provided on thedownstream side of the reducing valve to protect equipment.CAUTION!Anytime a reducing valve is adjusted, the use of a pressuregauge is recommended to verify correct pressure setting. Donot bottom out adjusting screw or spring cage.ServicingThis series is a new development for standard capacity domes-tic water regulation service. It has special unitized construc-tion which consists of the seat, disc and stem assembly, andstrainer screen all together in one unit for complete replacementmaintenance.To clean or replace parts.1. Remove spring cage and all parts above diaphragm.2. Loosen and remove diaphragm lock nut, lock washer,pressure plate, and diaphragm from valve stem.3. Unscrew seat cylinder from body and remove entire assem-bly. For diaphragm replacement only, see part number.4. While disassembled open gate valve to flush out collectedsediment.NOTICECast iron body regulators (LFN250/LFN250B) are not intendedfor buried or pit services.Main Line ServiceCold Water SupplyReducing ValveTo Sill CockFrom Street MainMeterAdjusting ScrewAdjusting Screw NutSpring CageSA135B116BypassAssembly formodels “B”Diaphragm(Size 1⁄2" - 560CA20)(Size 3⁄4", 1" - 23B20)DiaphragmLock Nut andPressure PlateName PlateComplete Replacement AssemblySee reverse side for ordering informationStemSeat CylinderIntegralStainless SteelValve SeatDiscStrainerScreenIS-2323AWARNING!Read this Manual BEFORE using this equipment.Failure to read and follow all safety and use informationcan result in death, serious personal injury, propertydamage, or damage to the equipment.Keep this Manual for future reference.

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