How to choose a chemical pump has always been a difficult problem that many pot friends are very concerned about. In different places, different media, different raw materials, it seems that it is not so easy to choose the right chemical pump. Let's learn about the selection requirements for chemical pumps.

Requirements for the selection of chemical pump models

Chemical pump selection needs to master and master the criteria for chemical pump selection:

1. Make the form and performance of the selected pump conform to the provisions of the main process parameters such as the total flow rate of the equipment, the pump stroke, the working pressure, the temperature, the total cavitation flow, and the suction power of the instrument.

2. Be sure to meet the requirements of medium characteristics. For pumps that convey flammable, flammable, explosive, hazardous or valuable media, reliable seals or leak-free pumps such as fluoroplastic magnetic pumps, pneumatic diaphragm pumps, and magnetic pumps are required. For pumps transporting corrosive media, it is specified that corrosion-resistant raw materials should be used for the thermal convection components, such as AFB stainless steel plate anti-corrosion pumps and CQF rubber products fluoroplastic magnetic pumps. For pumps conveying media containing solid particles, it is specified that the thermal convection parts should be made of metal composites and that the pump seals should be cleaned with a cleaning solution if necessary.

3. The mechanical equipment has high stability, low noise and low vibration.

4. In economic development, the fixed costs of machinery and equipment, operation, maintenance and service should be fully considered.

5. Selection of chemical pumps in common places:

(1) The centrifugal water pump has the characteristics of high speed ratio, small size, light weight, high efficiency, large total flow, simple structure, non-drip pulsating drink, stable performance, easy to operate and easy to maintain.

(2) When there are metrological verification procedures, the dosing pump should be selected.

(3) The water pump Yang adjustment is high, the total flow is not large and there is no suitable small total flow high water pump Yang centrifugal pump can be selected, the reciprocating pump can be selected, and the cavitation adjustment is not high, and the vortex pump can also be selected.

(4) When the pump stroke is very low and the total flow is large, you can choose mixed-flow pump and mixed-flow pump.

(5) When the viscosity of the medium is very high (greater than 650~1000mm2/s), lobe pump or reciprocating pump (gear oil pump and magnetic pump) can be considered.

(6) When the medium contains 75% gas source, the total flow rate is small, and the viscosity is less than 37.4mm2/s, the vortex pump can be used.

(7) Pumps with self-priming performance, such as self-priming centrifugal pumps, self-priming vortex pumps, pneumatic (electric) special pumps, diaphragm pumps, etc., should be used in places with frequent operation or troublesome pumping.

02 Basis for the selection of chemical pump models

The selection of pump model should be based on the production flow, water supply and drainage specifications, and consider from five levels.

1. The total flow rate is one of the key performance data information of the selected pump, which is directly related to the production and transportation capacity of all equipment. For example, in the process technology of the Planning Institute, it is possible to calculate the total flow rate of the pump: normal, less and larger. When selecting a pump, it should be based on the larger total flow rate and all normal total flows. When there is no large total flow, 1.1 times of all normal total flow can generally be used as the larger total flow. 2. The pump head required by the equipment system software is another key performance data information for pump selection. Generally, a capacity increase of 5% is used.