Product

Adjustable differential pressure control valve

Brand：Pneumatic eccentric butterfly valve 型号：ZY47F-16

Adjustable differential pressure control valve is a self operated fluid control device mainly used in household metering heating systems, automatic control systems, and air conditioning water systems. It achieves automatic adjustment through changes in the pressure of the medium itself, maintaining a constant inlet and outlet pressure difference for users. The following is its core information:
1. Function and working principle
Dynamic adjustment: By sensing the changes in inlet and outlet pressure difference through a pilot valve, the main valve opening is adjusted using a negative feedback mechanism to eliminate residual pressure head and pressure fluctuations in the pipeline network, and maintain stable pressure difference.
Stepless pressure regulation: Adopting a double flap structure design, the adjustable ratio of pressure difference can reach 25:1, suitable for a working pressure difference range of 0.02-0.3MPa.
2. Technical parameters
Pressure and temperature: nominal pressure of 1.6MPa, medium temperature suitable for 0-150 ℃.
Pressure pipe configuration: The length of the pressure pipe is 1.6 meters, and the connection end size is 1/2 "pipe thread. A filter screen needs to be installed at the water supply end.
3. Installation and maintenance
Installation position: Usually installed in the return pipe, the pressure pipe is connected to the water supply pipe, and the flow direction of the medium should be consistent with the arrow on the valve body.
Maintenance points: Regularly check the blockage of the filter screen and valve plug. The blockage can be automatically eliminated by closing the ball valve at the water supply end of the pressure pipe for 3-5 minutes.
4. Application scenarios
Household metering system: suitable for stable pressure control of heating and air conditioning water systems, supporting users to adjust independently.
Industrial field: Some models (such as ZZC type) can be used for differential pressure control in industries such as petroleum and chemical, and are suitable for non corrosive media.
5. Model and Selection
Common models: such as ZYF-16 type, flange size meets GB4216.2 standard, supports DN15-DN300 pipe diameter.
Selection criteria: The KV value should be calculated based on the maximum flow rate and minimum working pressure difference of the system to ensure that the flow regulation range matches.