Model 127-9 (Fueling Service) Model 127-9 Two-stage Preset Valve with Pressure Reducing Control 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 127-9 is specifically designed for fuel loading systems and performs the following functions: Pressure reducing - valve will control downstream (delivery) pressure at a predetermined point Two-stage shutdown SERIES FEATURES Model 127-9 SCHEMATIC WIRING DIAGRAM OPERATION ( Refer to wiring diagram) On start-up, SW1 energizes the normally closed solenoid, allowing the valve to open. While open, the pressure reducing pilot, sensing the downstream pressure, will modulate the valve as necessary to keep delivery pressure constant. At a predetermined number of gallons prior to the end of the loading run, SWI switches back to remove power from the normally closed solenoid and to make power available to the limit switch. The valve starts closed. At the low flow position, the limit switch closes and energizes the normally open solenoid. This "hydraulically locks" the valve in the low flow position. At the conclusion of the load, SW2 switches back, de-energizing the normally open solenoid and the valve closes fully. COMPONENTS The Model 127-9 consists of the following components, arranged as shown on the schematic diagram: 1.) Model 65 Basic Control Valve ( Fail Closed) 2.) Model 450 Two-Way Solenoid Pilot 3.) Model 451 Two-Way Solenoid Pilot 4.) Model 1340 Pressure Reducing Pilot 5.) Model 126 Ejector 6.) Model 141-2* Needle Valve * NOTE: Model 141-2 Needle Valve used on sizes 1-1/4”-3” 7.) Model 123 Inline Strainer 8.) Limit Switch SIZING The 127-9 valve is normally sized to match the meter size; however, in no case should the maximum velocity exceed 20 ft/sec, as shown below. 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 at the appropriate location, typically downstream of the preset meter. 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. 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 solenoids and limit switch must be wired into the preset register, as shown in the wiring diagram. REVISED 05/18/11 SIZE 1 1/4", 1 1/2" 2" 2 1/2" 3" 4" 6" 8" 10" 12" 14" 16" 24" MAX. FLOW, GPM 120 200 280 460 800 1800 3000 4200 6000 7200 9600 28000 Opens on signal from preset register Controls downstream pressure (adjustable) Closes in two stages based on signals from preset register Can be maintained without removal from the line Factory tested and can be pre-set to your requirements Explosion-proof prewired junction box available Two stage opening available via timer
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