First. Overview
 In order to improve the economy of power plants, steam turbines are equipped with a heat recovery system. That is equipped with high and low pressure heaters, in order to ensure that the heater has a water level operation, to prevent the heater without water level operation, the steam turbine on a steam extraction into the next level to reduce steam turbine efficiency and equipment safety, the heater Of the hydrophobic system is equipped with a hydrophobic control valve, which according to the heater's water level signal, automatically adjust the opening and closing of the hydrophobic valve opening, the heater water level is always maintained within a certain range. Hydrophobic control valve poor working conditions, in many cases under the work of two-phase fluid (ie, water and steam mixed state), but also belong to the throttling state of operation, cavitation is quite serious, cavitation to a certain extent will not be able to hydrophobic regulation The role of the valve, in this situation. The heater can not guarantee water level operation, thus reducing the economy of turbine operation. This shows that the selection of small cavitation, low noise, simple structure, reliable performance of the hydrophobic control valve is particularly important. In response to the requirements of the above conditions, I plant the design and manufacture of a new type of hydrophobic control valve, which is based on the original hydrophobic control valve, and draw on foreign experience in the structure, materials have been carried out on the reform so that the valve has a good job performance. The valve is leak-tight in the closed position due to the proper valve plug-to-seat contact face angle; the materials used to make the fairings and spool are made of high-quality stainless steel, even with two-phase flow and throttling , Cavitation speed is quite slow, thus extending the life of the valve, the noise is also small. Valve design are used easy assembly and disassembly structure, when the internal parts damaged, just remove the bonnet nut, you can remove the various parts in turn, any replacement of any parts, maintenance is very convenient.
 

Second, the working principle
T968Y series of heated water level control valve is composed of hydrophobic actuator and electric actuator two parts. Electric control valve input is sent to the regulator DC signal amplified by the servo amplifier to drive the implementing agency, resulting in axial thrust, driven by regulating valve action, causing changes in media flow to regulate various parameters in the system. At the same time, the actuator sends a valve position signal for servo amplifier comparison, so that the control valve always remains in an input signal corresponding position to complete the servo adjustment task.
 

Third, the main technical parameters

 Note: 1. The model also flange, right angle, and flange angle 
 2. Can also be equipped with pneumatic actuators or HQ intelligent actuators

Fourth, the main technical performance indicators

Fifth, the main valve material

Six, size