What Are the Selection Steps of Acid and Alkali Resistant Chemical Pumps? One Article to Tell You

Author : Arthur

Update time : 2022-01-03 14:29:16

Selection Steps of Acid and Alkali Resistant Chemical Pumps

Selection steps

1. List the basic data:

1. The characteristics of the medium: medium name, specific gravity, viscosity, corrosiveness, toxicity, etc.

2. The particle diameter and content of the factor contained in the medium.

3. Medium temperature: (70℃)

4. The required flow rate

General industrial acid and alkali resistant pumps can ignore the leakage in the piping system in the process flow, but the impact on the flow rate when the process changes must be considered. If the agricultural acid and alkali resistant pump is used for open channel water delivery, leakage and evaporation must also be considered.

5. Pressure: suction pool pressure, discharge pool pressure, pressure drop in the piping system (head loss).

6. Piping system data (pipe diameter, length, type and number of piping accessories, geometric elevation from suction tank to pressure tank, etc.).

If necessary, the device characteristic curve should also be drawn.

When designing and laying out piping, the following items should be noted:

A. Reasonably choose the pipe diameter, the pipe diameter is large, under the same flow rate, the liquid flow speed is small, the resistance loss is small, but the price is high, and the pipe diameter is small, which will cause the resistance loss to increase sharply, and make the head of the selected acid and alkali resistant pump Increase, increase the power of the belt, and increase the cost and operating expenses. Therefore, it should be considered from the perspective of technology and economy.

B, the discharge pipe and its pipe joints should consider the maximum pressure that it can withstand.

C. The pipeline layout should be as straight as possible, minimize the accessories in the pipeline and minimize the length of the pipeline. When it is necessary to turn, the bending radius of the elbow should be 3 to 5 times the diameter of the pipeline, and the angle should be greater than 90 as much as possible. ℃.

D. A valve (ball valve or stop valve, etc.) and a check valve must be installed on the discharge side of the acid and alkali resistant pump. The valve is used to adjust the operating point of the acid and alkali resistant pump. The check valve can prevent the acid and alkali resistant pump from reversing when the liquid is flowing backwards, and prevent the acid and alkali resistant pump from being hit by water hammer. (When the liquid flows back, it will produce huge reverse pressure, which will damage the acid and alkali resistant pump)

For basic selection, you can see this chapter 《Precautions for Selection of Acid and Alkali Resistant Pump》

2.Determine the Flow Head

acid and alkali resistant pumps

1.Determination of flow rate

A. If the minimum, normal, and maximum flow rates have been given in the production process, they should be considered based on the maximum flow rate.

B. If only the normal flow rate is given in the production process, a certain margin should be considered.

For ns>100 high flow and low unintended head acid and alkali resistant pumps, the flow margin is 5%, for small flow high and acid and alkali resistant pumps with ns<50, the flow margin is 10%, 50≤ns≤100 For acid and alkali resistant pumps, the flow margin is also taken as 5%. For acid and alkali resistant pumps with poor quality and poor operating conditions, the flow margin should be taken as 10%.

C. If the basic data only gives weight flow, it should be converted into volume flow.

The above is about the selection steps of acid and alkali resistant chemical pumps. If you have any questions, please contact us and we will serve you wholeheartedly.

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