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VALVE
OPERATION THE OCV MODEL 127-3
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- Maintains a constant downstream pressure despite fluctuations in demand and inlet pressure.
- Assuming proper sizing and adjustment, the 127-3 will maintain downstream pressure at the set point ± 2 psi.
- Model 65 Basic Control Valve, a hydraulically-operated, diaphragm-actuated globe or angle valve which closes with an elastomer-on-metal seal.
- Model 1340 Pressure-Reducing Pilot, a two-way, normally-open pilot valve which senses down stream pressure under its diaphragm and balances it against an adjustable spring load. An increase in downstream pressure tends to make the pilot close.
- Model 126 Ejector, a simple “tee” fitting with a fixed orifice in its upstream port. It provides the proper pressure to the diaphragm chamber of the main valve, depending on the position of the pressure-reducing pilot.
- Model 141-3 Flow Control Valve, a needle-type valve which provides adjustable, restricted flow in one direction and free flow in the opposite direction. On the 127-3, the flow control valve is connected as an opening speed control.
- Model 159 Y-Strainer, (standard on water service valves), the strainer protects the pilot system from solid contaminants in the line fluid.
- Two Model 141-4 Ball Valves, (standard on water service valves, optional on fuel service valves), useful for isolating the pilot system for maintenance or troubleshooting.
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