Valve Type: Balanced pilot-trim cage guided control valve
Valve Nominal Size: DN25 through DN600; 1 inch through 24 inch
Pressure Rating: PN16, 40, 100, 160, 250, 400; ANSI Class 150, 300, 600, 900, 1500, 2500
Body Style: Cage Guided globe or angle
Trim Type: Balanced pilot-plug
Flow Direction: Flow over the plug
Flow Characteristic: Equal percentage EQ%; Linear
Rangeability: 50:1 to 20:1
Temperature Range: From -196°C to 538 °C
Seat Leakage: ANSI IV or V
Actuator: Pneumatic diaphragm actuator; Pneumatic cylinder actuator;
Electric actuator; Hand-wheel manual for option
Description & Features
For those applications where a tight shut-off is required, and the service conditions high temperature, high pressure drop, a pilot plug is available. The standard flow direction is flow to close.
CV2700 control valve pilot balanced plug design incorporates two plugs, the main larger diameter plug used for control and the smaller pilot situated inside the main plug significantly reduces fluid forces acting on the main plug. This design produces a high integrity metal temperature where a resilient seal would be unsuitable. Opening of the valve is by the pilot plug, which lifts from its seat prior to the main plug head. This produces a flow passage to equalise the pressure above and below the valve plug, thereby significantly reducing the fluid forces acting on the valve plug. In the closed position the inlet pressure is admitted above the plug to produce a high downward seat load and the only leakage path is across metal to metal seating.
