none RK34-70XL Installation Guide
Contents
1. DIAPHRAGM CARTRIDGE GASKET UNION GASKET TAILPIECE CUNION NUT BODY INDICATES PARTS SUPPLIED IN REPAIR KITS Regulators in series Where the desired pressure reduction is more than a 4 to 1 ratio i e 200psi to 50psi multiple regulators in series should be installed SEALED CAGE WARNING Loosen lock washer at adjustment bolt slowly Look for any trapped water pressure under the sealed cage washer Relieve pressure before removing bell CAUTION Anytime a reducing valve is adjusted a pressure gauge must be used downstream to verify correct pressure setting Do not bottom out adjustment bolt on bell housing Valve may be installed in any position WARRANTY ZURN WILKINS Valves are guaranteed against defects of material or workmanship when used for the services recommended If in any recommended service a defect develops due to material or workmanship and the device is returned freight prepaid to ZURN WILKINS within 12 months from date of purchase it will be repaired or replaced free of charge ZURN WILKINS liability shall be limited to our agreement to repair or replace the valve only ZURN WILKINS 1 Troubleshooting Pipe lines in a water supply system must be of sufficient car rying capacity to maintain adequate pressure at the most remote or highest fixture Under the maximum probable fixture use minimum adequate pressure is generally 8 to 15 lbs but may be more2. Chatter usually originates with worn seat washer or loosely installed seal ring Pipelines could be small or too light Reducing valves could be too small Pipes and valves being small would accentuate this condition b Inspect seal ring If a deep channel appears on seal ring face replace or use the opposite side c Frequently noise appears in a faucet or appliance and seems to originate from the reducing valve There is a general tendency to use streamline piping of a relatively small size Velocity is naturally high and noise of fast moving water is not unusual ZURN WILKINS 1747 Commerce Way Paso Robles CA 93446 Phone 855 663 9876 Fax 805 238 5766 2 ZURN WILKINS IS7OXL REV 8 13 www zurn com
3. depending on the equipment being supplied Relatively high service pressures which can create high water velocities in pipe lines would allow use of smaller pipes to satisfy fixture use However high velocity tends to cause whistling and humming Reduction of pressure by the use of a pressure reducing valve PROBLEM 1 Pressure creeps or builds up in system above the setting of pressure reducing valve SOLUTION a in an attempt to eliminate such a condition may reduce pipe line capacities below that which is adequate for maximum probable use When high service pressures are in effect either continu ously or periodically the application of a pressure reducing valve will be successful only when the installed pipe line is of adequate size to satisfy the system demand at the lower pressure When actual water demands are unknown the valve size should be no less then the existing pipe size POSSIBLE CAUSE OR CAUSES A Thermal expansion of water as it is being heated B Foreign matter on seating face of seal ring C Cut worn or chipped seal ring D Cut or worn stem o ring or worn o ring groove This is a natural consequence It may happen each time that the heater runs A pressure relief valve or expansion tank must be installed This will not prevent pressure rise but should limit it to a safe level b Flush the reducing valve by opening one or two fixture outlets wide If this does not correct the problem remove seal ring
4. for cleaning c Replace with new seal ring Temporary repairs may be made by turning the seal ring over d Replace with new stem o ring and or cartridge 2 Pressure and fixture flow is unsteady SOLUTION a made on them A Low water supply pressure in mains caused possibly by high area demand during certain periods of the day B Heavy periodic demands by appliances in the house This is a water department problem It is due to the mains being inadequate for the demands b House service lines may at times be inadequate for the load Size of some pipelines may need to be increased Pressure setting of reducing valve may be too low c Try increasing pressure before changing pipelines 3 Small inadequate flow from fixtures SOLUTION a A Pipelines to fixtures may be too small or house main supply may be inadequate for normal fixture demand B Heavy periodic demands by appliances in the house C Screen clogged with debris It may be necessary to increase pipe sizes only in some sections of the system leading to the offending appliances or fixtures Increasing the house service mains might be necessary if small supply is general at all fixtures b Raise pressure gradually by readjusting valve until this point is determined c Clean screen 4 Valve appears to be noisy hums whistles or chatters SOLUTION a A Hum or whistle is usually caused by a high velocity of flow in pipelines causing vibration B
5. Model 70XL LEAD FREE Pressure Reducing Valve with Integral By pass 3 4 amp 1 This product contains a weighted average lead content less than 0 25 for wetted surfaces ZURN WILKINS Q Installation U Testing O Maintenance Instructions REPAIR KIT INSTRUCTIONS HOW TO MAKE REPAIRS Shut off service before starting disassembly 1 Open faucet on dwelling to remove line pressure 2 Note distance that adjustment bolt protrudes from bell housing Loosen locknut on adjustment bolt then turn adjustment bolt out of bell housing to remove spring tension 3 Unscrew bell housing counterclockwise and remove spring spring disc and friction ring 4 While holding diaphragm unscrew diaphragm bolt counter clockwise and remove bolt diaphragm disc and diaphragm 5 Remove cartridge counterclockwise Use a 1 1 8 socket for the 3 4 and a 1 3 8 socket for the 1 Make sure cartridge gasket is removed from the body TO REASSEMBLE 1 While disassembled open inlet of water service to flush out valve body and service line of debris 2 Lubricate o ring on replacement cartridge then thread into body clockwise 3 Replace diaphragm diaphragm disc and diaphragm bolt It is necessary to hold diaphragm while tightening diaphragm bolt 4 Replace friction ring spring spring disc and bell housing Tighten bell housing onto body by threading clockwise Turn adjustment bolt into bell housing to old setting E
6. nter dwelling and turn on several faucets Turn on water service Let water run for several seconds then turn off faucets in dwelling 8 Adjust regulator to desired pressure by turning adjusment bolt clockwise into bell housing to raise pressure or counterclock wise out of bell housing to lower pressure It is recommended a pressure gauge be installed down stream of the regulator to ensure pressure is reduced below 75 psi NOTE When reducing pressure open a down stream faucet to relieve pressure 9 Tighten locknut when desired pressure is achieved NOOO INSTALLATION INSTRUCTIONS Install valve in line with arrow on valve body pointing in direction of flow Before installing reducing valve flush out line to remove loose dirt and scale which might damage seal ring and seat All valves will be furnished with stock settings to reduce to 50 psi To readjust reduced pressure loosen outer locknut and turn adjustment bolt clockwise into bell housing to raise reduced pressure or coun terclockwise out of bell housing to lower reduced pressure NOTICE Annual inspection and maintenance is required of all plumbing system components To ensure proper performance and maximum life this product must be subject to regular inspection testing and cleaning ADJUSTMENT BOLT xN S LOCKNUT SEALED CAGE aD WASHER cS NAMEPLATE BELL ye HOUSING FRICTION RING N lt SPRING ice fo DIAPHRAGM an B ee DISC _
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