How the water supply valve selection
Gate valve and butterfly valve
The main disadvantage of the butterfly valve is that the butterfly plate occupies a certain cross section of the water, which increases a certain head loss;Although the gate valve does not have this problem, the height of the large-diameter vertical gate valve affects the depth of soil covering of the pipeline. The length of the large-diameter horizontal gate valve increases the horizontal area occupied by the pipeline and affects the arrangement of other pipelines.
In order to reduce the depth of soil covering in the water supply network, generally larger diameter pipelines are equipped with butterfly valves; those that have little effect on the depth of soil shall be equipped with gate valves.
In terms of usage, butterfly valves have higher failures than gate valves.In terms of usage, butterfly valves have higher failures than gate valves.
Ball valves, plug valves and butterfly valves.
The ball valve has the advantages of simple structure, small flow resistance, reliable sealing, flexible action, convenient maintenance and operation.The plug valve also has similar advantages, except that the water passing area is not a perfect circle.Ball valves and plug valves are heavier than butterfly valves, casting and processing are difficult, and the price is more expensive, generally suitable for small and medium-diameter pipelines.In recent years, due to the improvement of casting technology, the production cost of the ball valve has been reduced.Therefore, the feasibility of using ball valves on large-diameter pipelines is worth exploring.