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Straight-through elevating precision pressure reducing valve should be installed in horizontal pipe road, vertical lift is generally installed in a vertical tube on the road, and the flow of the medium from bottom to top. Swing installation location wrong, are normally installed in horizontal pipe, but also can be installed in vertical lines, or pour material on the pipeline. Installing a precision pressure reducing valve, should pay special attention to flow direction of medium, should make medium and normal flow direction of arrow on valve body direction is consistent, otherwise it will be truncated normal flow of the medium. Bottom valve should be installed at the bottom of the pump suction pipe. Closed, will be in middle water hammer pressure tube, will lead to serious damage to valves and piping or equipment, especially for big or high pressure pipe lines, reason should be the height of the check valve selection is attention.