Overview of imported self-operated pressure regulating valves:
German doldr imported self-operated pressure regulating valve is a kind of automatic constant pressure difference hydraulic condition balance valve, the use of the pressure and temperature of the medium flowing through the valve itself as energy to drive the valve to work automatically, without the need for external power supply and secondary instrument.
The imported self-operated pressure regulating valve is divided into two types according to the position of the pressure point, the front of the valve and the rear of the valve, and when the pressure point is in front of the valve, it is used to regulate the constant pressure in front of the valve; When the pressure point is behind the valve, it is used to adjust the pressure behind the valve to be constant. When the pressure before and after the valve is introduced into both sides of the air chamber of the actuator at the same time, the self-operated differential pressure regulating valve can adjust the constant pressure at both ends of the regulating valve, and the pressure difference installed at both ends of the orifice plate installed on the pipeline can also be introduced into the two sides of the air chamber of the membrane actuator to form a self-operated flow regulating valve, or the flow rate can be adjusted by using the self-operated differential pressure regulating valve after the flow is detected in other ways.
Self-operated control valves are mainly divided into imported self-operated pressure regulating valves, self-operated differential pressure regulating valves, self-operated temperature regulating valves, and self-operated flow regulating valves. Among them, the imported self-operated pressure regulating valve is a new type of regulating valve. Compared with manual control valves, it has the advantage of being able to adjust automatically; Compared to electric control valves, it has the advantage that no external power is required.
In closed water circulation systems (such as hot water heating systems, air conditioning chilled water systems), the correct use of this valve can easily realize the flow distribution of the system; The dynamic equilibrium of the system can be realized; It can greatly simplify the commissioning work of the system; It can stabilize the working state of the pump, etc.
Parameters of imported self-operated pressure regulating valve:
DN: DN15-300mm, etc.
Nominal pressure: pn4MPa, etc. (High pressure micro pressure can be determined).
Body material: cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti), etc.
Spool Material: Hard Seal - Stainless Steel (1Cr18Ni9Ti, Cr18Ni12Mo2Ti); Soft seal - stainless steel inlaid rubber ring, etc.
Pressure balance: stainless steel bellows (DN15 125), balance diaphragm, etc., to achieve pressure balance.
Temperature range: 80 350 etc. (High temperature can be determined).
When choosing the imported self-operated pressure regulating valve, it is necessary to select according to the actual needs and process parameters, consider the above parameters, compare and screen, and select the appropriate model and specification.
The advantages of imported self-operated pressure regulating valve mainly include:
1.The action is sensitive, and it can quickly respond to the pressure change of the controlled medium and ensure the stable flow of the controlled medium.
It has good sealing performance and can ensure that the controlled medium does not leak.
2.The pressure fluctuation is small, which can ensure the pressure stability of the controlled medium.
3.No external energy is required, no noise, no vibration, simple structure, small size, light weight, easy to maintain and operate.
4.It can realize automatic control without manual operation, which greatly improves the production efficiency and automation.
It should be noted that the disadvantage of the imported self-operated pressure regulating valve is that the control accuracy may be affected by factors such as ambient temperature and pressure fluctuations, so it needs to be selected and adjusted according to the actual situation when using.