High-pressure Heater Emergency Drain Control Valve

The high-pressure heater drain control valve is a special control valve specially designed for high-pressure heater emergency drain systems and other scenarios requiring large flow, large diameter, and excellent sealing performance. It adopts a pilot-operated structure. When the valve needs to be opened urgently, the actuator drives the valve stem to first open the small valve core (pilot valve core), causing rapid pressure relief inside the valve disc. The small valve core continues to move to drive the large valve core to open. The surface of the valve trim is hardened to a hardness of approximately HRC70, which is resistant to scouring and has a long service life. This valve is applied to the high-pressure heater drainage in thermal power plants and can also be used as a deaerator water level control valve. The high-pressure heater drain control valve can be controlled pneumatically or electrically.

Specification of Control Valve:
Trim Features: Multi-layer porous sleeve
Pilot-operated structure
Balanced trim structure
Valve Body Type: Straight-through type
Bonnet Type: Standard type
Heat-dissipating type
Flow Characteristics: Equal percentage
Linear
Size Range: DN100-200 (4”-8”)
Pressure Rating: PN1.6, 4.0, 6.3, 10Mpa (ANSI150, 300, 600LB)
Leakage Class: ASME B16.104 V (standard metal valve seat)
Pipeline Connection: Flanged type
Butt-welded type
Applicable Temperature Range: Below 260°C
Actuator Type: Pneumatic diaphragm actuator
Pneumatic piston actuator
Electric actuator