Model 127-3 (Fueling Service) Model 127-3 Pressure Reducing Valve Global performance. Personal touch. TOLL FREE 1.888.628.8258 phone: (918)627.1942 fax: (918)622.8916 7400 East 42nd Place, Tulsa, OK 74145 email: [email protected] website: www.controlvalves.com The Model 127-3 is applicable anywhere a pressure must be reduced to a manageable level in fuel delivery systems. SERIES FEATURES Model 127-3 OPERATION The normally open, spring loaded pilot, sensing downstream pressure, responds to changes in pressure and causes the main valve to do the same. The net result is a constant modulating action of the pilot and main valve to hold the downstream pressure constant. The pilot system is equipped with an opening speed control that fine tunes the valve’s response to the system variables. COMPONENTS The Model 127-3 consists of the following components, arranged as shown on the schematic diagram: 1.) Model 65 Basic Control Valve ( Fail Closed) 2.) Model 1340 Pressure Reducing Pilot 3.) Model 126 Ejector 4.) Model 141-3* Flow Control Valve ( Opening Speed Control) * NOTE: Model 141-2 Needle Valve used on sizes 1-1/4”-3” 5.) Model 123 Inline Strainer 6.) 155 L Visual Indicator ( optional) SIZING Sizing is a critical issue in the selection of pressure reducing valves. Definitive sizing information can be found in the OCV Catalog under both the Series 127 section and the Engineering section Performance Charts. Consult the factory for assistance. MAX. PRESSURE END CONNECTIONS DUCTILE IRON STEEL/STN STL ALUMINUM Threaded 640 psi 640 psi 285 psi Grooved 300 psi 300 psi 200 psi 150# Flanged 250 psi 285 psi 285 psi 300# Flanged 640 psi 740 psi --- RECOMMENDED INSTALLATION Install the valve with adequate space above and around the valve to facilitate servicing. Refer to the Dimension Table. Valve should be installed with the bonnet (cover) at the top, particularly 8" and larger valves, and any valve with a limit switch. Shut-off valves should be installed upstream and downstream of the control valve. These are used to isolate the valve during start-up and maintenance. Install a pressure gauge downstream of the valve to enable adjustment to the required pressure setting. This gauge may be installed in the downstream side port of the valve body. REVISED 05/18/11 Reduces a higher inlet pressure to a lower outlet pressure Constant outlet pressure over wide flow range Pilot-operated main valve not subject to pressure fall off Outlet pressure is adjustable with single screw Can be maintained without removal from the line Adjustable opening/response speed Factory tested and can be pre-set to your requirements SCHEMATIC
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