What are the materials of the AODD pump?Air-operated diaphragm pump is a pump model with self-priming ability that has developed very rapidly in recent years. The working principle is to use compressed air as power to drive the reciprocating motion of the diaphragm to realize the pumping of the medium. Therefore, there is no impeller in an air-operated diaphragm pump. This rotating part has better passing performance, not only can transport clean water medium, but also suitable for transporting various kinds of sewage containing particulate impurities and various media with high viscosity and poor fluidity.

The material of the air-operated diaphragm pump

The material of air-operated diaphragm pump can be divided into four kinds, namely cast iron air-operated diaphragm pump, aluminum alloy air-operated diaphragm pump, stainless steel air-operated diaphragm pump, engineering plastic air-operated diaphragm pump.

1. Cast iron air operated diaphragm pump

The body of the cast iron air operated diaphragm pump is made of solid cast iron material, which is the basic air operated diaphragm pump material. Its advantage is that it is cheap, but its disadvantage is that it cannot be used to transport corrosive media. If it is used to transport non-corrosive media, please consider the purchase cost. In this case, it is recommended to choose a cast iron air-operated diaphragm pump.

2. Aluminum alloy air operated diaphragm pump

The pump body of the aluminum alloy air-operated diaphragm pump is made of aluminum alloy. Compared with cast iron, stainless steel and other materials, aluminum alloy has the advantage of light weight, but the disadvantage is poor toughness, easier thermal deformation and weak corrosion resistance. It is suitable for applications where the conveying medium temperature is not high and the medium is non-corrosive but requires frequent movement.

3. Stainless steel air operated diaphragm pump

Stainless steel air-operated diaphragm pumps are a commonly used type of diaphragm pump. The advantage is that it has a certain corrosion resistance. According to the corrosiveness of the medium, various types of stainless steel can be selected, such as 304, 316 and 316L, which are not easy to produce rust in use, and are suitable for working conditions that require hygiene. Select sanitary stainless steel can also be used in the food industry. However, its price is higher than that of cast iron and aluminum alloys, so it cannot be used in some highly corrosive media.

4. Engineering plastics pneumatic diaphragm pump

Engineering plastic pneumatic diaphragm pump is a new type of diaphragm pump. The pump body is made of engineering plastic or reinforced polypropylene. Its obvious advantages are that its corrosion resistance is stronger than that of ordinary metal diaphragm pumps, and its price is lower than that of stainless steel diaphragm pumps, but due to its own shortcomings, it cannot be compared with metal materials in strength and has poor temperature resistance. And it is easy to deform when encountering high temperature. Suitable for transporting corrosive and low temperature media. With the continuous development of technology, in recent years, air-operated diaphragm pumps made of fluoroplastic and lined PTFE materials have been produced, which have strong corrosion resistance and heat resistance. Of course, the price is much higher than other materials.

Reference: Diaphragm pump