The dual-plate wafer-type check valve is a commonly used pipeline valve whose function is to control the flow of fluid in the pipeline. The following sections describe its structural features and the precautions to be observed during installation.
I. Structural Features
1. Short structural length, compact size, and light weight.
2. Rapid disc closure with low water hammer pressure.
3. Applicable to both horizontal and vertical pipelines, with convenient installation.
4. Smooth flow passage with low fluid resistance.
5. Responsive operation and good sealing performance.
6. Short disc travel with low closing impact force.
7. Simple, compact overall structure with an attractive appearance.
8. Long service life and high reliability.
II. Working Principle & Structural Description
1. This valve is mainly composed of parts such as the valve body, disc, stem, spring, and washer.
2. This valve opens and closes its disc automatically under the pressure of the flowing medium, preventing backflow of the medium and achieving the check (non-return) function.
3. The design and manufacturing technical requirements of this valve shall be executed in accordance with JB/T 8937.
4. The connecting flange dimensions of this valve shall be executed in accordance with JB/T 8937.
5. The testing requirements of this valve shall be executed in accordance with the relevant provisions of GB/T 13927.
III. Installation Position
The dual-plate wafer-type check valve shall be installed in a horizontal or vertical position in the pipeline, and shall not be inclined or installed at a bend. The installation position shall allow easy operation and maintenance without affecting the normal operation of the pipeline.
IV. Preparation Before Installation
Before installing the dual-plate wafer-type check valve, check the cleanliness and flatness of the pipeline. There shall be no debris or dirt inside the pipeline, and the pipeline bore shall be the same as the bore of the valve. In addition, the sealing performance and operating performance of the valve shall be checked to ensure they are normal.
V. Installation Procedure
1. Place the dual-plate wafer-type check valve at the installation position and check its levelness with a spirit level.
2. Connect the dual-plate wafer-type check valve to the pipeline; during connection, take care that it is neither too tight nor too loose, so as not to impair the sealing performance.
3. After the valve is installed, a pressure test shall be carried out in accordance with the relevant standards to ensure the sealing performance of the pipeline and the valve.
4. After the pressure test is passed, an operation test shall be carried out to check whether the operating performance of the valve is normal.
VI. Precautions
1. During installation of the dual-plate wafer-type check valve, take care to prevent debris and dirt in the pipeline from entering the interior of the valve, so as not to affect its normal operation.
2. During service of the valve, carry out regular maintenance and upkeep, and check whether its sealing performance and operating performance are normal.
3. When removing the valve, close the pipeline valves first to prevent the fluid in the pipeline from escaping.
In conclusion, the installation requirements for the dual-plate wafer-type check valve are very stringent: only operations performed in accordance with the relevant standards can ensure its normal operation and service life. Therefore, when installing and using the dual-plate wafer-type check valve, operate strictly in accordance with the relevant requirements to ensure the safe and stable operation of the pipeline.
Post time: Nov-13-2026
