The self-operated pressure regulating valve is divided […]
The self-operated pressure regulating valve is divided into two types according to the position of the pressure-taking point before and after the valve. When the pressure point is in front of the valve, the pressure is constant before adjusting the valve; when the pressure point is behind the valve, the pressure is constant after adjusting the valve. . When the valve front and the post-valve pressure are simultaneously introduced into the air chamber of the actuator, the self-operated differential pressure regulating valve can adjust the pressure at both ends of the regulating valve to be constant, and can also introduce the pressure difference at both ends of the orifice plate installed on the pipe into the film. On both sides of the air chamber of the mechanism, a self-operated flow regulating valve is formed, or the flow rate is adjusted by using a self-operated differential pressure regulating valve after the flow is detected.
The self-operated regulating valve relies on the pressure and temperature flowing through the medium in the valve as the energy to drive the valve to work automatically, and does not require an external power supply and a secondary instrument. Therefore, it is called a self-operated control valve.
The self-regulating valve is a new type of regulating valve. Compared with the manual regulating valve, it has the advantage of being able to automatically adjust; compared to the electric regulating valve, it has the advantage that no external power is required. Application practice proves that in the closed water circulation system (such as hot water heating system, air conditioning chilled water system), the correct use of this valve can easily realize the flow distribution of the system; the dynamic balance of the system can be realized; the system can be greatly simplified Commissioning work; can stabilize the working state of the pump.