Why should double-disc gate valves be installed in horizontal pipelines with the valve stem pointing vertically upward?
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RT, I came across it by chance in a book; I had never noticed this before
The main reason why double-disc gate valves should be installed in horizontal pipelines is to ensure the valve’s sealing performance. In horizontal pipes, double-disc gate valves can achieve a tighter fit between the two discs more easily, thereby providing a better seal and preventing water leakage and pressure loss. At the same time, the vertically upward design of the valve stem also facilitates the operation and maintenance of the valve. With the valve stem pointing vertically upward, it is easier for the operator to determine the open or closed state of the valve, and maintenance tasks such as repairing or replacing seals are also more convenient. Generally speaking, double-disc gate valves should be installed in horizontal pipelines; the design with the valve stem pointing vertically upward is intended to ensure the safety and reliability of the valve as well as to facilitate maintenance. .
It’s best not to worry about this; just follow the installation instructions provided for the valve, and that will be correct. Because as it develops, the structure has become more diverse. The old-style installation has its advantages and disadvantages; as long as you follow the instructions, it will be fine – for reference only.