China check valve category: According to the structure, connection and material classification

China check valve category: According to the structure, connection and material classification

China check valve is a commonly used fluid control equipment, according to the structure, connection and material can be divided into a variety of types. This article will introduce the types of check valves in China from a professional point of view.

1. Sort by structure

(1) Lifting type China check valve: mainly composed of body, valve cover, valve disc, spring and so on. When the fluid enters the China check valve from the inlet, due to the action of gravity and spring force, the valve disc will close the valve, so that the fluid can only flow in one direction. When the fluid flows in reverse, due to the position of the disc and the action of the spring, the disc will open the valve so that the fluid can continue to flow in reverse.

(2) Rotary Chinese check valve: mainly composed of valve body, valve cover, shaft, dowel, valve disc, etc. When fluid enters the China check valve from the inlet, the disc opens the valve due to the push of the dowel, so that the fluid can continue to flow in the opposite direction. When the fluid flows in the opposite direction, due to the blocking action of the dowel, the valve disc will close the valve, so that the fluid can only flow in one direction.

(3) Butterfly check valve: mainly composed of valve body, valve cover, valve disc, butterfly plate, etc. When the fluid enters the China check valve from the inlet, due to the action of gravity and the butterfly plate, the valve disc will close the valve, so that the fluid can only flow in one direction. When the fluid flows in reverse, due to the elastic action of the butterfly plate, the valve disc will open the valve so that the fluid can continue to flow in reverse.

2. Type by connection type

(1) Flange connection China check valve: through the flange and pipe connection, with good sealing performance.

(2) Welded connection China check valve: through welding and pipeline connection, with good strength and sealing performance.

(3) Threaded Chinese check valve: through the thread and pipe connection, with good disassembly and cleaning performance.

3. Sort by material

(1) Cast iron China check valve: suitable for pipeline systems with low pressure, low temperature and non-corrosive media.

(2) Cast steel China check valve: suitable for medium pressure, normal temperature, non-corrosive media pipeline system.

(3) Stainless steel China check valve: suitable for all kinds of corrosive media pipeline system.

(4) Copper alloy China check valve: suitable for high pressure, high temperature, corrosive media pipeline system.

(5) Plastic check valve: suitable for pipelines with less corrosive media.

In short, there are many types of Chinese check valves, and different types of Chinese check valves have different characteristics and scope of application. When choosing a Chinese check valve, the appropriate type and material should be selected according to the specific working conditions and use needs. I hope this article introduces the types of check valves in China and can provide you with some reference and help.