  The dosing Pump pipeline efficiency is the percentage of the net lift of the pump device to the lift of the device, and the lift of the device is the sum of the net head of the device and the head loss of the dosing pump pipe. Dosing metering pump pipe head loss and dosing metering pump flow through the pipe, pipe length, pipe diameter, pipe dosing pump type and number of pipe fittings, as well as dosing metering pump pipe installation quality Factors related to increase dosing metering pump pipeline efficiency, can take the following measures.
　　
1. With economic caliber
　　
In the construction and renovation of medium and small pump stations, the investment of dosing metering pump lines accounts for a large proportion of investment in pumping station projects, especially for pumping stations with high-lift and long-distance water conveyance. The dosing metering pump pipe diameter not only affects the size of the pumping station project investment, but also directly affect the level of pumping station efficiency. When dosing dosing pump pipe length and dosing dosing pump pipeline through a certain flow rate, the greater the diameter of the election, the smaller the flow rate, the smaller the head loss, the less energy consumption, but dosing metering pump line Big investment; if the diameter is chosen small, the situation is opposite to the above. Therefore, a reasonable determination of dosing metering pump pipe diameter, whether to improve pumping station efficiency, save energy, or to reduce the project investment is of great significance. For details on how to determine the economic pipeline, see Chapter IV, Section IV.
　　
2. Shorten the dosing pump pipe length
　　
Shorten the dosing dosing pump pipe length, not only can save the dosing dosing pump pipeline investment, but also reduce the loss along the way / K head, therefore, the dosing dosing pump pipe length should be shortened to the maximum extent.
　　
For horizontal mixed flow pump and centrifugal pump , in the past in the dosing metering pump piping layout often arranged as a polyline, resulting in dosing metering pump pipe length, elbow and more. Pumping technology may be based on the intake, the height and position of the tank and out of the pool water level, the water pump is mounted obliquely, the dosing pump line arranged in a line to the fold line disposed the transformation, not only shortens the length of the metering dosing pump tubing, while Can be reduced by 2 45 ° elbow. Double-suction centrifugal pump tilted installation, eliminating the need for dosing metering pump pipe all the elbows, dosing metering pump into and out of the pipeline straight into the straight out; horizontal multi-stage centrifugal pump tilted installation, in addition to water Dosing metering pump pipe set an elbow, can dispense with the elixir metering pump all the elbows on the pipeline, for medium and small pumps, 'for each reduction of 90 ° elbow, local head loss can be reduced 0.18 ~ 0.27 m.
　　
3. Reduce dosing pump pipe fittings
　　
Dosing metering pump pipe attachment local head loss coefficient, head loss is also caused by large, the operation will inevitably consume a large amount of energy. Therefore, should minimize unnecessary dosing metering pump pipe fittings.
　　
1. With economic caliber
　　
In the construction and renovation of medium and small pump stations, the investment of dosing metering pump lines accounts for a large proportion of investment in pumping station projects, especially for pumping stations with high-lift and long-distance water conveyance. The dosing metering pump pipe diameter not only affects the size of the pumping station project investment, but also directly affect the level of pumping station efficiency. When dosing dosing pump pipe length and dosing dosing pump pipeline through a certain flow rate, the greater the diameter of the election, the smaller the flow rate, the smaller the head loss, the less energy consumption, but dosing metering pump line Big investment; if the diameter is chosen small, the situation is opposite to the above. Therefore, a reasonable determination of dosing metering pump pipe diameter, whether to improve pumping station efficiency, save energy, or to reduce the project investment is of great significance. For details on how to determine the economic pipeline, see Chapter IV, Section IV.
　　
2. Shorten the dosing pump pipe length
　　
Shorten the dosing dosing pump pipe length, not only can save the dosing dosing pump pipeline investment, but also reduce the loss along the way / K head, therefore, the dosing dosing pump pipe length should be shortened to the maximum extent.
　　
For horizontal mixed flow pump and centrifugal pump , in the past in the dosing metering pump piping layout often arranged as a polyline, resulting in dosing metering pump pipe length, elbow and more. Pumping technology may be based on the intake, the height and position of the tank and out of the pool water level, the water pump is mounted obliquely, the dosing pump line arranged in a line to the fold line disposed the transformation, not only shortens the length of the metering dosing pump tubing, while Can be reduced by 2 45 ° elbow. Double-suction centrifugal pump tilted installation, eliminating the need for dosing metering pump pipe all the elbows, dosing metering pump into and out of the pipeline straight into the straight out; horizontal multi-stage centrifugal pump tilted installation, in addition to water Dosing metering pump pipe set an elbow, can dispense with the elixir metering pump all the elbows on the pipeline, for medium and small pumps, 'for each reduction of 90 ° elbow, local head loss can be reduced 0.18 ~ 0.27 m.
　　
3. Reduce dosing pump pipe fittings
　　
Dosing metering pump pipe attachment local head loss coefficient, head loss is also caused by large, the operation will inevitably consume a large amount of energy. Therefore, should minimize unnecessary dosing metering pump pipe fittings.
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