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The selection basis of fluoroplastic pump
- May 29, 2018 -

Fluorine pump, as its name implies, is the pump lined with fluorine plastics. According to its structure, it can be divided into four types: fluorine centrifugal pump, fluorine magnetic pump and fluorine self-priming pump. The fluorine lining pump body is manufactured by advanced production technology with metal shell tight lined fluorine plastic F46 / F4 etc. The bearing part of the pump is metal material with high mechanical strength, strong pressure resistance, superior mechanical impact resistance and so on. The impeller, pump cover and so on are all made of metal inserts, which are molded by one-off high-temperature molded fluorine plastics.

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Fluorine pumps are widely used in the transportation of corrosive media in chemical production. Chlorine wastewater treatment and acid adding process in ionic membrane caustic soda project, electrolytic solution transportation in non-ferrous metal smelting, pickling process in automobile manufacturing, pharmaceutical, petroleum, electroplating, dye, pesticide, paper making, food industry, etc. Transport of any concentration of sulfuric acid, hydrochloric acid, hydrofluoric acid, nitric acid, Wang Shui, strong alkali, strong oxidant and other strong corrosive media without damage for a long time at -20 ℃ ~ 150 ℃

 

 

The selection basis of fluoroplastic pump should be considered from five aspects according to the process flow and water supply and drainage requirements, namely, liquid conveyer volume, device head, liquid property, pipeline arrangement and operation conditions, etc. PumP Lining PTFE.jpg

1. Flow rate is one of the important performance data of pump selection, which is directly related to the production capacity and transportation capacity of the whole plant. If the design institute process design can calculate the pump normal, minimum, maximum three kinds of flow. When the pump is selected, the maximum flow rate is based on the maximum flow rate and the normal flow rate is taken into account. When there is no maximum flow rate, 1.1 times of the normal flow rate is usually taken as the maximum flow rate.

 2, the head needed by the device system is another important performance data of pump selection. 

 3. Liquid properties, including the name of liquid medium, physical properties, chemical properties and other properties, physical properties such as temperature c density d, viscosity u, the diameter of solid particles in the medium and the content of gases, etc., which relate to the head of the system, The calculation of effective cavitation allowance and the type of suitable pump: chemical properties, mainly referring to the chemical corrosion and toxicity of liquid medium, are the important basis for selecting pump materials and which type of shaft seal. PTFE Pump Valve Lining.jpg

4. The pipeline layout conditions of the device system refer to some data, such as the height of the liquid delivery distance from the liquid delivery direction, the lowest liquid level on the suction side, the highest liquid level on the discharge side, and the pipe specifications and their length, materials, pipe fittings specifications, quantities, etc. In order to calculate the comb head and check the cavitation margin. 5. There are a lot of operating conditions, such as liquid operating T saturated steam force P, suction side pressure PSZ (absolute pressure, discharge side vessel pressure PZ, altitude, ambient temperature operation is gap or continuous, pump position is fixed or removable.


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