The trim cage and plug adopt a mixed multi-hole and tandem structure to make sure there is no occurrence of cavitation when saturated water passes the control valve. With the cage multi-stage throttling, the throttling area gradually increases, which meets the requirements for saturated water vaporization volume expanding, so that fluid velocity is reduced and erosion of trims by the fluids is lowered. The throttling part is separable from the sealing face to effectively protect the sealing face. 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:Body type:Bonnet type:Flow characteristic:Size:Pressure class:Leakage class:Pipe connection type:Applicable temperature range:Actuator type:
| multi-level, multi-hole cage balanced trim structure |
| straight-through type |
| standard type heat dissipation type |
| equal percentage linear |
| DN65-250(2.5"-10") |
| PN1.6,4.0,6.3,10Mpa(ANSI 150,300,600LB) |
| ASME B16.104 Ⅴ(standard type metal seat) |
| flange type butt welding type |
| less than 420C° |
| pneumatic diaphragm actuator pneumatic piston actuator electric actuator |
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