Structure and installation method of high-pressure resistant check valves

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　　How should a check valve be installed when used in high-pressure environments? Below, we will take you through the structure of high-pressure resistant check valves as well as their specific installation methods. 1. The disc of a high-pressure check valve is disk-shaped and rotates around an axis located in the valve seat passage. Due to the streamlined design of the internal passage, its flow resistance is lower than that of a lift-type check valve; it is suitable for applications with low flow rates and stable flow conditions in large-diameter systems. However, it is not appropriate for use with pulsating flows, and its sealing performance is inferior to that of lift-type check valves. Butterfly check valves come in three types: single-disc, double-disc, and semi-double-disc. These three types are primarily classified based on the valve diameter, with the aim of reducing hydraulic shock when the flow of the medium stops or reverses. II. High-pressure check valves are those in which the valve disc slides along the vertical center line of the valve body; threaded check valves can only be installed in horizontal pipes, and spherical discs can be used on high-pressure, small-diameter check valves. The body shape of the butterfly check valve is the same as that of a globe valve (it can be used interchangeably with a globe valve), so its fluid resistance coefficient is relatively high. The structure of the high-pressure check valve is similar to that of a globe valve, with the valve body and valve disc being identical to those in a globe valve. Guiding sleeves are machined on the upper part of the valve disc and the lower part of the valve cover; the valve disc’s guiding sleeve can move up and down freely within the valve seat’s guiding sleeve. When the medium flows in the proper direction, the valve disc opens due to the thrust exerted by the medium, while when the flow stops, the valve disc drops back down onto the valve seat, thereby preventing the medium from flowing in the reverse direction. III. A high-pressure check valve is a check valve in which the valve disc rotates around a pin inside the valve seat. The disc check valve has a simple structure, can only be installed in horizontal pipelines, and offers good sealing performance. IV. The high-pressure check valve is a valve in which the valve disc slides along the center line of the valve body. The pipe-type check valve is a newly developed type of valve; it is small in size, light in weight, and easy to manufacture, making it one of the trends in the development of check valves. However, the fluid resistance coefficient is slightly higher than that of the swing check valve. V. The high-pressure check valve is a valve used for shutting off boiler feed water and steam; it combines the functions of a lift-type check valve with those of a globe valve or angle valve.