Metering pump installation
1., exports higher than imports, avoid siphonage
2. the pump head and the injection valve require vertical installation
3., the attached pipe can be tightened by hand, please do not use the tool; the thread does not use the raw meal belt
4. the supply voltage is stable and grounded
5. the installation environment is clean, spacious and well ventilated
First, determine the actual maximum pressure: pressure from the metering pump rated pressure slightly higher than the required, generally higher than the 10 to 20%. Do not choose too high, too high pressure will waste energy, increase equipment investment and operating costs.
Two, determine flow: the selected metering pump flow should be equal to or slightly greater than the required flow rate. Metering pump flow range of use in metering pumps rated flow range of 30 to 100% better, at this time the metering pump repeated reproduction accuracy. Considering the economic and practical, it is suggested that the actual demand of metering pump is chosen as 70 ~ 90% of the rated flow of the metering pump.
Three, to determine the pump head (Ye Liduan) material: specific specifications of the metering pump is determined, according to the property flow of medium selection flow of the material, this step is very important, if the choice is undeserved, will cause damage to corrosive medium flow components or medium leakage pollution system. Serious accidents can also occur.
Other aspects: in the choice of metering pumps, but also need to consider the accuracy of the required metering pump level, the higher the level of accuracy, the greater the input. Metering pump general working temperature at - 30~100 degrees Celsius, special measuring pump temperature range of work is wider (such as with insulation jacket of high temperature liquid metering pump, its delivery temperature up to 500 degrees Celsius). For the medium size, the requirements should be less than 0.1mm, for larger than 0.1mm medium, can be targeted to the pump flow structure changes to meet the needs. For the viscosity of the medium, the general should be 0 ~ 1000mm/s, the special metering pump can reach 6000 mm2/s, mechanical diaphragm metering pump flow is the maximum flow rate measured under the rated pressure of the calibration (Shi Wen water transport), if the pressure drops, the output flow than the calibration of high.
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