Gas heater control valve

Ultra-supercritical thermal power units, also known as the minimum flow gas heater control valve boiler feed pump Pilot Safety Valve. Mounted to the pump outlet in power plant connected to the deaerator. Boiler feed pumps to suck water from the deaerator in the boiler sent. To prevent overheating and minimum flow to pump cavitation, requires a secure flow to the pump flow in any case must not be less than a certain a provision, that is. When the boiler feed water flow required is very small, the need for timely open the minimum flow gas heater valve, a portion of the high-pressure water return from the pump outlet to the deaerator to ensure the safe operation of the pump.
     Minimum flow patio heater control valve operating conditions are very harsh. When the minimum flow gas heater valve is turned on, you need to high temperature and pressure of water cascade buck, buck process minimize the occurrence of cavitation. When turned off, the need to withstand up to 35MPa even higher static pressure difference, so shut tight.
     The minimum flow valve for its use harsh working conditions, it should be able to control the throttle deputy flow area and the throttle progression and control the media flow rate, as well as improve throttle Vice reduce fluid drag coefficient of cavitation in the Oven Gas Valve flow path possibilities. Because the main constituent parts throttle vice --- maze smaller disk size, complex structure, physical test inconvenience. Thus numerical simulation techniques to study the structure of this type may be more convenient and accurate.