What kinds of chemical pump and the respective application occasions

First, understand the selection principle of chemical pump

1. Make the type and performance of the selected chemical pump meet the requirements of device flow, head, pressure, temperature, cavitation flow, suction and other process parameters.

2, must meet the requirements of the medium characteristics.

For the transmission of inflammable, explosive toxic or valuable medium chemical pump, the shaft seal is required to be reliable or the use of non-leakage chemical pump, such as magnetic drive chemical pump, diaphragm chemical pump, shield chemical pump.

For the transmission of corrosive medium chemical pump, the convection components are required to use corrosion resistant materials, such as AFB stainless steel corrosion resistant chemical pump, CQF engineering plastic magnetic drive chemical pump.

For the transmission of chemical pump containing solid particle medium, the convection parts are required to use wear-resistant materials, and when necessary, the shaft seal is washed with clean liquid.

3, mechanical reliability is high, low noise, small vibration.

4. Economically, the total cost of equipment, operation, maintenance and management fees should be taken into account.

5, centrifugal chemical pump has the characteristics of high speed, small volume, light weight, high efficiency, large flow, simple structure, infusion without pulsation, stable performance, easy operation and convenient maintenance.

Therefore, in addition to the following circumstances, centrifugal chemical pump should be selected as far as possible:

a. When there are measurement requirements, the metering chemical pump is selected

b. Reciprocating chemical pump can be used when the head requirement is very high, the flow rate is very small and there is no suitable small flow high head centrifugal chemical pump. If the cavitation requirement is not high, the vortex chemical pump can also be used.

c. When the head is very low and the flow is very large, axial flow chemical pump and mixed flow chemical pump can be used.

d, the medium viscosity is larger (greater than 650~1000mm2/s), can consider the use of rotor chemical pump or reciprocating chemical pump (gear chemical pump,. Screw chemical pump)

e. When the gas content of the medium is 75%, the flow is small and the viscosity is less than 37.4mm2/s, the vortex chemical pump can be used.

f. Chemical pumps with self-priming performance, such as self-priming centrifugal chemical pumps, self-priming vortex chemical pumps, and pneumatic (electric) diaphragm chemical pumps, should be selected for occasions when starting frequently or filling chemical pumps are inconvenient.