Type selection and material selection of acid discharge pump

Acid discharge pump is a commonly used industrial pump in the chemical industry, but because of the strong corrosiveness of acid, many materials can not be used as lining, so let's take you to understand the material selection of acid discharge pump.

PP material: lighter. The general temperature resistance is 70 °C. Its appearance is translucent or white, resistant to general strong acid and alkali.

PVDF material: polyvinylidene fluoride (PVDF) is a high-strength, corrosion-resistant material with a translucent or white appearance. Polyvinylidene fluoride is used in three main areas: petrochemical, electrical and electronic, and fluorocarbon coatings. Because of its excellent chemical resistance, processability, fatigue resistance and creep resistance, PVDF is one of the better lining materials for pumps, valves, pipes, fittings, storage tanks and heat exchangers. Long-term use:-40 °C 150 °C, commonly used temperature: 90 ℃, higher working temperature: 110 °C, with good chemical corrosion resistance, high temperature resistance, oxidation resistance and radiation resistance. PVDF material is relatively heavy.


"if these two types of acid-base pumps are used to transport various concentrations of aqua regia, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acids, strong acids, strong oxidants or strong alkali organic solvents of various concentrations, as well as other corrosive gas and liquid media, polypropylene (PP) acid-base pumps are generally used for acids and bases. If there are strong acids and bases, it is suitable to use (PVDF) fluoroplastic acid-base pump. "


When choosing an acid-base pump, it is recommended to pay attention to the following points:

1. There are several types of acid-base pumps, such as acid-base magnetic pump, acid-base self-priming pump and acid-base vertical pump. Different types of pumps have different performance, function and location, which will also affect the procurement cost, the operating conditions of the pump and a series of subsequent problems.

2. The material of acid-base pump has natural acid-base corrosiveness. In a long-term corrosion environment, fluoroplastic or polypropylene plastic materials are recommended, while stainless steel and metal materials can cause corrosion and are not recommended.

The technical parameters of acid-alkali pump, such as flow rate, head, quality, power, temperature, etc., are also clear about the on-site installation method and production process requirements. Select the acid-alkali pump that meets your actual working conditions, and consider the performance of the pump, purchasing cost and so on.