Bulletin AY-719-B GP-2000 K1, K3 and K6 Pressure Reducing Valve Installation and Maintenance Instructions Typical Single Stage Reduction Installation (for Steam) Minimum 20 Pipe Diameters to First Turn or Valve (Outlet Pipe Diameter) Minimum 10 Pipe Diameters (Inlet Pipe Diameter) Armstrong Control Panel Air In Gate Control Pipe Valve (Pitch Down) Armstrong Strainer Safety Valve GP-2000K Bypass Globe Valve Minimum 10 Pipe Diameters Armstrong Trap Fig. 1-1 Installation Instructions 1. An Armstrong Inverted Bucket Steam Trap is recommended to drain condensate at inlet of PRV. 5. If two stage reduction is needed, a minimum of 20 pipe diameters between valves is recommended. 2. An Armstrong Y-strainer should be installed before the PRV to reduce the chance of dirt fouling. 6. By-pass line around PRV will allow system operation while valve is being serviced. 3. Pressure gauges should be installed before and after the PRV. The downstream gauge should be installed in or near the control pipe (5/16" O.D.). 7. Install PRV with main diaphragm housing down and making sure the flow is in the direction of the arrow on the PRV body. 4. Control pipe connects into a 1/4" tapping on the side of the pilot valve. Be certain the control pipe is pitched away from the PRV. Irratic control could result if this is not done. Pipe length should be a minimum of 10 outlet pipe diameters. 8. Do not install quick opening and closing valve on the downstream side of PRV. GP-2000 K1, K3 and K6 Startup and Adjustment Procedures Note: Improper adjustment of the valve could cause hunting, water hammer or damage to the main parts of the valve itself. 1. Open valve on drip leg to allow inverted bucket trap to drain the condensate on the PRV inlet. 4. Open valve on the outlet of PRV and also on control pipe. 2. Open the by-pass valve around PRV to blow the system down. Care should be taken not to open the valve completely so the safety valve does not open. After adequate time to clean the system, close the valve. 5. Open inlet valve to PRV - slowly. 6. Adjust air loading pressure until the desired outlet pressure is achieved on the downstream pressure gauge. Note: Steam demand must be present in order to properly set the PRV. 3. Set air loading pressure to top of the PRV. 7. Adjust again after the entire system stabilizes. Fig. 2-1 210 GP200 0K 3 195 180 GP-2 000 K 6 165 150 Steam Outlet PSIG 135 120 105 1 0K 0 -20 GP 90 75 60 45 30 15 0 15 30 45 60 75 90 105 120 135 150 Air Loading PSIG Armstrong-Yoshitake, Inc. 221 Armstrong Blvd., P.O. Box 408, Three Rivers, Michigan 49093 - USA Ph: (269) 279-3600 Fax: (269) 273-8656 Bulletin No. AY-719-B 11/00 Steam Traps \ Humidifiers \ Steam Coils \ Valves \ Air Vents \ Pumping Traps \ Water Heaters www.armstrong-intl.com Printed in U.S.A.