Pump selection

It is generally recommended to use 316 stainless steel to transport sulfate, but its price is higher. You can also use a fluoroplastic centrifugal pump, but it is necessary to prevent crystal precipitation caused by temperature changes.； It is recommended to use a centrifugal pump made of CF-8M (ZG304) to transport alkali liquid. The machine seal can use double-end seal. ；

It is recommended to download the pump selection manual and take a look

Generally speaking, it is better to use a diaphragm-type metering pump for the medium of ammonia-alkali nickel salt, because the plunger type cannot avoid the problem of contamination of the medium by lubricating oil. As for the diaphragm material, it is enough to use alkali-resistant fluorine rubber.

Concentrated acids generally use plastic materials, such as PTFE, PVDF. If the acidity and alkalinity are not very high, metal can be used.

Pump selection 1. Pump selection principles 1. The type and performance of the selected pump meet the requirements of process parameters such as device flow, head, pressure, temperature, cavitation flow, suction lift, etc. 2. Must meet the requirements of media characteristics. For pumps transporting flammable, explosive, toxic or precious media, reliable shaft seals or non-leakage pumps are required, such as magnetic drive pumps, diaphragm pumps, and canned pumps. For pumps transporting corrosive media, the convection parts are required to be made of corrosion-resistant materials, such as AFB stainless steel corrosion-resistant pumps and CQF engineering plastic magnetic drive pumps. For pumps transporting media containing solid particles, the convection parts are required to be made of wear-resistant materials, and the shaft seal is flushed with clean liquid when necessary. Mechanically, it has high reliability, low noise and small vibration. . Economically, the total cost of equipment, operation, maintenance and management fees should be taken into consideration to minimize the total cost. 5. The centrifugal pump has the characteristics of high speed, small size, light weight, high efficiency, large flow rate, simple structure, pulsation-free infusion, stable performance, easy operation and convenient maintenance. 2. Pump selection based on 1. Flow rate. Flow is the amount of medium delivered by the pump per unit time. Technicians should generally give normal, minimum and maximum flow rates. Pump data sheets generally give only normal and rated flow rates. When selecting a pump, the rated flow rate is required to be no less than the maximum flow rate of the device, or 1.05 to 1.10 times the normal flow rate. 2. Lift. Generally, the rated lift of the pump is required to be 1.10~1.05 times the required lift of the device. 3. The inlet pressure and outlet pressure of the pump. The size of the inlet and outlet pressure affects the pressure resistance of the shell and the requirements of the shaft seal. 4. Temperature. It refers to the temperature of the inlet medium of the pump. Generally, the normal, minimum and maximum temperatures of the pump inlet medium during the process should be given. 5. Cavitation allowance of the device. 3. Selection of pump type The type of pump should be reasonably selected based on factors such as the process parameters of the device, the physical and chemical properties of the transport medium, the operating cycle, and the structural characteristics of the pump. Centrifugal pumps have the advantages of simple structure, pulsation-free infusion, and simple flow adjustment. Therefore, except for the following situations, centrifugal pumps should be used as much as possible: 1. When there are metering requirements, a metering pump is selected. 2. When the head is very high and the flow is very small and there is no suitable small flow high-lift centrifugal pump to choose from, a reciprocating pump can be used. If cavitation requirements are not high, a vortex pump can also be used. 3. When the head is very low and the flow is large, axial flow pumps and mixed flow pumps can be used. 4. When the medium viscosity is large (greater than 650~1000mm2/s), you can consider using a rotor pump or a reciprocating pump (gear pump, screw pump). 5. When the medium has a gas content of 75%, the flow is small, and the viscosity is less than 37.4mm2/s, a vortex pump can be used. 6. For occasions with frequent starts or inconvenient pump filling, pumps with self-priming performance should be selected, such as self-priming centrifugal pumps, self-priming vortex pumps, and pneumatic (electric) diaphragm pumps.

Take a look at the pump selection manual, good for beginners

It is recommended that the diaphragm and plunger leak easily. I am a metering pump manufacturer from Prominte Company. If you need it, please contact me at 025-86975066-603