Install overflow valve inside to control the normal operation of pump.
内装溢流阀控制泵的正常运行。
2
High sensitive electromagnetic valvecontrol the flow of water, the servo control system, the operation is extremely simple.
高灵敏电磁阀控制水流，随动控制系统，操作异常简便。
3
This paper describes the stability of control loop consisting of refrigeration evaporator and thermostatic expansion valve. It may directly influence refrigerating efficiency and operation safety.