Problem: The valve installation is not standardized. The problem manifestation: the shut-off valve is installed with high inlet and low outlet, or the rising stem gate valve
is installed dry underground, or the check valve
is installed reversely, and the system cannot work normally. Problem analysis: (1) When installing the shut-off valve, pay attention to the flow direction of the medium. (2) The gate valve and the rod of the clan plug are easy to rust and should not be installed underground. 3) When installing the one-way valve, pay attention to the flow direction of the medium. Solution: (1) The stop valve installation must pay attention to the flow direction of the medium, so that the fluid in the pipeline flows through the valve disc from bottom to top (commonly known as low inlet and high outlet). (2) Gate valves and plug valves allow fluid to flow or flow out from either end. There is no directionality in installation. In order to prevent the valve stem from rusting, opening and closing is difficult. Therefore, rising stem gate valves should not be installed underground. (3) The one-way valve (check valve) installation must pay attention to the flow direction of the medium to ensure the free opening of the valve disc. Horizontal lift check valve should be installed horizontally; vertical lift check valve should be installed on the vertical pipeline; medium should enter from top to bottom; swing check valve can be installed horizontally or where the medium flows from bottom to top On the vertical pipeline.
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