Proportional Pressure Reducing Valve Installation Instructions
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Release Time：2021-05-21
Before installing the proportional pressure reducing valve, the pipeline should be washed clean and a Y-type filter should be installed in front of the valve. The small debris in the pipeline will cause the pressure reducing valve to close lax, causing leakage and failure, resulting in super high static pressure of the pipe network behind the valve. The filter shall be installed on the main pipe and the plug shall be removed to lead the drain pipe with valve to the sewage tank for timely drainage.
Proportional Pressure Reducing Valve Installation Instructions
1. Before the installation of proportional pressure reducing valve, the pipeline should be washed clean and Y-type filter should be installed in front of the valve. Due to the small debris in the pipeline, the pressure reducing valve will not close tightly, causing leakage and failure, resulting in super high static pressure of the pipe network behind the valve. The filter shall be installed on the main pipe and the plug shall be removed to lead the drain pipe with valve to the sewage tank for timely drainage.
2, proportional pressure reducing valve must be set before and after the gate valve or butterfly valve in order to cut off the water during maintenance.
3. Proportional pressure reducing valve should be installed vertically. The installation instructions said that it can be installed vertically or horizontally, but when installed horizontally, the eccentric wear of the lower part will be caused by gravity, so it is advisable to install vertically and should be installed in the direction of the arrow shown on the valve body. Jiangyin building fire hydrant water supply automatic sprinkler system proportional pressure reducing valve are vertical installation effect is obvious normal function.
4, in the high-rise building fire water supply in order to ensure the water supply of uninterrupted pressure relief valve group should be designed for two groups of the same diameter parallel one of the group to work a group of standby. And it should be the same as the front and rear pipe diameters so that the water supply will not be affected during maintenance and replacement.
5, fire water supply system in the proportional pressure reducing valve should not be set bypass pipe. In the initial stage of the construction of the pressure reducing valve of the fire hydrant system in Jiangyin Building, a bypass pipe was installed. During the quarterly inspection after about one and a half years of use, it was found that the pressure gauge behind the valve had the same value as the pressure gauge in front of the valve. The test pressure of the water discharge test of the open test valve showed normal again. After the inspection, it was found that the static pressure was abnormal and normal due to leakage caused by the aging of the leakage of the valve rubber lining of the valve rubber lining on the bypass. Therefore, in order to ensure the reliability of the water supply of the fire water supply system, I think that the bypass pipe should not be set.
6, in the proportional pressure reducing valve should be installed before and after the pressure gauge can be directly used to observe the pressure changes before and after the pressure reducing valve to monitor the pressure reducing effect and working conditions.
7, in the high-rise building fire hydrant system of the proportional type pressure reducing valve should generally set the flexible rubber joint. On the one hand, to facilitate the installation and removal of the pressure reducing valve, it can also play the role of expansion joint.
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2026/02/28
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