Model 127-80 (Fueling Service) Model 127-80 Pressure Reducing and Solenoid Shut-off 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 127-80 has a wide range of applications: anywhere pressure must be reduced to a manageable level, combined with a need for an on/off electrical operation. Typical examples include: Pump systems Process pressure control Truck loading terminals SERIES FEATURES Reduces a higher inlet pressure to a lower outlet pressure Constant outlet pressure over wide flow range Electrically operated solenoid allows valve to open (reduce pressure) or shut-off (close) 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 Model 127-80 SCHEMATIC OPERATION A two-way solenoid acts as an override and when closed, causes the main valve to close. Opening the solenoid allows the spring loaded, normally open pilot, sensing downstream pressure to respond 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. The solenoid can be supplied normally closed ( energize to enable) or normally open (energize to close). COMPONENTS The Model 127-80 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 451 Two-Way Solenoid Pilot 4.) Model 126 Ejector 5.) Model 141-3* Flow Control Valve ( Opening Speed Control) * NOTE: Model 141-2 Needle Valve used on sizes 1-1/4”-3” 6.) Model 123 Inline Strainer 7.) Model 155L Visual Indicator SIZING Sizing is a critical issue in the selection of pressure reducing valves. Definitive sizing information can be found in the Series 127 section of the OCV Catalog and Engineering section Performance Charts. Consult the factory for assistance. 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. Following main valve installation, the solenoid must be wired into the user's control system. This is a simple two-wire (plus ground) connection. REVISED 05/18/11 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 ---
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