The 60W00 Series HP heater emergency drain control valve is a high flow and large size special control valve used in HP heater emergency drain systems that require good sealing performance. It adopts the pilot type structure. When emergent opening of the valve is needed, the actuator drives the stem to first open the small plug (pilot-operated plug) and realizes fast pressure relief in the valve cavity. The small plug continues to move and drives the large plug to open. The trim surface is subjected to hardening treatment, reaching a hardness of about HRC70. It is featured by good erosion resistance and long service life. The valve is used for HP heater draining in thermal power plants and can also serve as a deaerator level control valve. The HP heater drain control valve can be pneumatically or electrically controlled.

Parameters of control valves:

Trim features:	multi-level, multi-hole cage pilot type structure balanced trim structure
Body type:	straight-through type
Bonnet type:	standard type heat dissipation type
Flow characteristic:	equal percentage linear
Size:	DN100-200(4" -8" )
Pressure class:	PN1.6, 4.0, 6.3, 10Mpa(ANSI 150, 300, 600LB)
Leakage class:	ASME B16.104 Ⅴ(standard type metal seat)
Pipe connection type:	flange type butt welding type
Applicable temperature range:	less than 260C°
Actuator type:	pneumatic diaphragm actuator pneumatic piston actuator electric actuator