What are the common mistakes in installing Horizontal Multistage Pump
1. There are many elbows on the water inlet pipe of Horizontal Multistage Pump
If there are many elbows used on the water inlet pipe, some water flow resistance will be added. Moreover, the elbow should be turned in a straight direction, and it is not allowed to turn in a horizontal direction to avoid gathering air.
2. When installing the water inlet pipeline, the horizontal section should be horizontal or upward
Doing so will gather air in the water inlet pipe, reduce the vacuum degree of the water pipe and the water pump, reduce the water suction head of the water pump, and reduce the water output. The correct way is: its horizontal section should be slightly skewed towards the water source, it should not be horizontal, let alone tilt upward.
3. The water inlet of Horizontal Multistage Pump is directly connected with the elbow
This will cause the water to spread unevenly as it enters the impeller through the elbow. When the diameter of the water inlet pipe is larger than the water inlet of the water pump, an eccentric reducer should be installed. The plane part of the eccentric reducer should be installed on the top, and the inclined plane should be installed on the bottom. Otherwise, the air will be collected, the water output will be reduced or the water will not be pumped, and there will be knocking noises. If the diameter of the water inlet pipe is the same as that of the water inlet of the water pump, a straight pipe should be added between the water inlet of the water pump and the elbow, and the length of the straight pipe should not be less than 2 to 3 times the diameter of the water pipe.
4. The outlet pipe of Horizontal Multistage Pump is above the normal water level of the outlet pool
If the water outlet is above the normal water level of the outlet pool, although the head of the pump is increased, the flow rate is reduced. If the water outlet must be higher than the water level of the water outlet due to the limited terrain conditions, an elbow and a short pipe should be installed at the mouth of the pipe to make the water pipe into a siphon type and reduce the height of the water outlet.
5. The position of the water inlet of the water inlet pipe is wrong
① The distance between the water inlet of the water inlet pipe and the bottom of the water inlet pool and the wall is smaller than the diameter of the water inlet. If there is dirt such as mud and sand on the bottom of the pool, if the distance between the water inlet and the bottom of the pool is less than 1.5 times the diameter, it will cause poor water intake or suction of mud and sand debris during pumping, which will block the water inlet.
②When the water inlet of the water inlet pipe is not deep enough, it will cause vortices on the water surface around the water inlet pipe, which will affect the water inlet and reduce the water output. The correct installation method is: the water depth of small and medium-sized water pumps shall not be less than 300-600mm, and the depth of large-scale water pumps shall not be less than 600-1000mm.
6. When setting the bottom valve, the bottom section of the water inlet pipe is not straight
If installed in this way, the valve cannot be closed by itself, resulting in water leakage. The correct installation method is: the bottom section of the water inlet pipe equipped with a bottom valve is preferably straight. If it cannot be installed vertically due to terrain conditions, the angle between the axis of the water pipe and the horizontal plane should be more than 60°.
The above is the detailed description of the six misunderstandings of Horizontal Multistage Pump. Horizontal Multistage Pump is a centrifugal pump with compact structure, small size, light weight, low noise, remarkable energy saving effect and convenient maintenance. It adopts standard vertical motor and quick-install mechanical seal, which is very convenient to replace.