The valve can realize fast starting within 6 seconds. Through adjusting the steam pressure, the control system of the electric actuator can be suited to parameter starting, stopping and running of the unit under different service conditions. After load shedding by the unit, the boiler may not stop immediately and can start running again within several minutes after the malfunction is eliminated. Thus, not only the starting and stopping times of the boiler are reduced, but heat impact on the turbine is reduced. The adjustment of desuperheater water is quickly linked to the high pressure bypass, so that temperature and pressure are lowered to a great extent, and the bulky temperature and pressure reducing systems and equipment in power plants are reduced. Therefore, the valve is an important control valve in reheating unit bypass systems of large volume units.
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 |
| Z type body |
| standard type heat dissipation type |
| equal percentage |
| inlet DN125 (5") outlet DN300(12") |
| PN25,32Mpa(ANSI 1500LB) |
| ASME B16.104 Ⅴ(standard type metal seat) |
| butt welding type |
| less than 570C° |
| pneumatic diaphragm actuator pneumatic piston actuator electric actuator |
