Flange Check Valve
Introduction:
The disc of the flange check valve is disc-shaped and rotates around the shaft of the valve seat channel. Because the channel in the valve is streamlined, the flow resistance is smaller than that of the butterfly check valve, which is suitable for low flow rate and flow. Large-caliber occasions that do not change frequently.
Working Principle:
A check valve in which the disc slides along the vertical centerline of the valve body. Butterfly check valves can only be installed on horizontal pipelines. Balls can be used for discs on high-pressure small-diameter check valves. The shape of the valve body of the butterfly check valve is the same as that of the globe valve (it can be used in common with the globe valve), so its fluid resistance coefficient is larger. Its structure is similar to the globe valve, and the valve body and disc are the same as the globe valve. The upper part of the valve disc and the lower part of the valve cover are machined with guide sleeves. The valve disc guide can be freely lifted and lowered in the valve guide. When the medium flows downstream, the valve disc is opened by the thrust of the medium. It falls vertically on the valve seat to prevent the reverse flow of the medium.
Maintenance and Installation:
1. Both ends of the valve passage must be blocked, and there should be a dry and ventilated room. In case of long-term storage, it should be checked frequently for corrosion prevention.
2. The valve should be cleaned before installation, and the defects caused during transportation should be eliminated.
3. During installation, it must be carefully checked whether the signs and nameplates on the valve meet the requirements for use.
4. The valve is installed on a horizontal pipeline with the bonnet up.
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