Butterfly buffer check valve

Butterfly buffer check valve can be divided into:

1. The disc of butterfly buffer check valve is disc-shaped, rotating around the axis of the valve seat channel. Because the flow forming line of the channel in the valve, the flow resistance is smaller than that of the rising butterfly check valve, which is suitable for the large caliber occasions with low flow rate and unsteady flow, but it is not suitable for pulsating flow, and its sealing performance is lower than that of the rising and falling type. Butterfly check valve is divided into three types: single disc type, double disc type and multi half type. These three types are mainly divided according to the valve diameter, so as to prevent the hydraulic impact when the medium stops flowing or flows backward.

2. Butterfly buffer check valve: the check valve with the disc sliding along the vertical centerline of the valve body. The internal thread check valve can only be installed on the horizontal pipeline. The disc can be a ball on the high-pressure small caliber check valve. The body shape of butterfly check valve is the same as that of globe valve (it can be used as globe valve), so its fluid resistance coefficient is large. Its structure is similar to the stop valve, and the valve body and disc are the same as the stop valve. The upper part of the disc and the lower part of the bonnet are processed with a guide sleeve. The guide sleeve of the disc can freely rise and fall in the guide sleeve of the disc. When the medium flows in the same direction, the disc is opened by the medium thrust. When the medium stops flowing, the disc falls on the valve seat by the self suspension, which plays a role in preventing the medium reverse flow. The direction of medium inlet and outlet channel of through butterfly check valve of Shanghai Enguang Valve Co., Ltd. is perpendicular to that of valve seat channel; the direction of medium inlet and outlet channel of vertical lift check valve is the same as that of valve seat channel, and its flow resistance is smaller than that of through butterfly check valve.

3. Butterfly cushion check valve: a check valve in which the disc rotates around a pin in the seat. The disc check valve has simple structure and can only be installed on the horizontal pipeline with good sealing performance.

4. Butterfly buffer check valve: a valve whose disc slides along the centerline of the valve body. Pipeline check valve is a new kind of valve. It has small volume, light weight and good processing technology, which is one of the development directions of check valve. However, the fluid resistance coefficient is slightly larger than that of swing check valve.

5. Compact check valve: This valve is used for boiler feed water and steam cut-off. It has the comprehensive functions of lift check valve, stop valve or angle valve.

In addition, there are some check valves that are not suitable for pump outlet installation, such as bottom valve, spring type, Y type and other check valves.

Principle features of butterfly buffer check valve:

Butterfly buffer check valve is mainly used at the outlet of water pump of industrial water supply and sewage treatment plant to prevent the medium reverse flow in the pipe network and automatically eliminate the destructive water hammer, so as to ensure that the water pump and pipeline are not damaged. Butterfly buffer check valve is mainly composed of valve body, disc, buffer device and micro regulating valve. Butterfly buffer check valve is characterized by novel structure, small volume, small fluid resistance, stable operation, reliable sealing, wear resistance and good buffer performance