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Check valves permit flow in one direction only and close automatically if flow reverse. Entirely automatic in action, depending upon pressure and velocity of flow within the line to perform their functions of opening and closing.
The Double Regulating Valve, with its integral fixed orifice design, offers an accuracy of ± 5% on all settings, for precise flow regulation and measurement.
Primarily used in injection or other circuits requiring a DRV for system balancing. The DRV allows the valve to be used for isolation and to be re-opened to its pre-set position to maintain required flow rate.