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Industry development prospects of check valve
China’s check valve industry chain is numerous, but it is not a powerful valve country. Generally speaking, my country has entered the ranks of the world’s valve powers, but in terms of product quality, there is still a long gap between my country and the valve powers. The industry’s low concentration of production, low R&D […]
Troubleshooting of check valve
Troubleshooting of check valve: 1. The disc is broken The reasons that cause the valve disc to break are: The pressure of the medium before and after the check valve is close to balance and they are “see-saw” each other. The valve disc often beats against the valve seat, and the disc made of some […]
Selection criteria for check valves
Selection criteria for check valve: The selection criteria for check valves are as follows: 1. In order to prevent the medium from flowing back, check valves should be installed on equipment, devices and pipelines; 2. Check valves are generally suitable for clean media, not for media containing solid particles and high viscosity; 3. Generally, horizontal […]
Process design of check valve
Process design of check valve: (1) The quality control of the main body blank. All parts of this valve are forgings. The forging process is carried out in strict accordance with the forging process regulations and process cards. The initial forging temperature, final forging temperature, deformation degree and deformation speed are strictly controlled, and the […]
Installation method and precautions of check valve
Check valve installation method: 1. Swing check valve: The disc of the swing check valve is disc-shaped and rotates around the shaft of the valve seat passage. Because the inner passage of the valve is streamlined, the flow resistance is smaller than that of the lift check valve. It is suitable for large-caliber occasions where […]
Classification of check valves
Classification of check valves: The check valve that opens or closes by the force of the medium flow to prevent the medium from flowing back is called a check valve. Check valves belong to the category of automatic valves, which are mainly used in pipelines where the medium flows in one direction, and only allow […]
Check valve and its working principle
What is check valve? Check valve refers to a valve whose opening and closing parts are circular discs and rely on its own weight and medium pressure to generate actions to block the back flow of the medium. It is an automatic valve, also called check valve, one-way valve, return valve or isolation valve. The […]
Detailed introduction of soft sealing butterfly valve-(3)
Features of soft sealing butterfly valve: 1. Small and light, easy to disassemble and repair, and can be installed in any position. 2. The structure is simple and compact, the operating torque is small, and the 90-degree rotation opens quickly. 3. The flow characteristics tend to be straight, and the regulation performance is good. 4. […]
Detailed introduction of soft sealing butterfly valve-(2)
There are many types of soft-sealed butterfly valves, which can be divided into the following categories according to different forms: Classified by structure Classified by structure (1) Center sealing butterfly valve (2) Single eccentric sealed coal valve (3) Double eccentric sealing butterfly valve (4) Triple eccentric seal valve Classified according to the sealing surface material: […]
Detailed introduction of soft sealing butterfly valve-(1)
The butterfly plate of the soft sealing butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation reaches 90°, the valve is fully opened. The […]