As an air-operated diaphragm pump housing, polyethylene (PE) is very tough, exceptionally resistant to wear, has low water absorption capacity and displays good general resistance to chemicals. Only strong oxidants such as nitric acid, oleum and halogens can damage PE.
PE competes with polypropylene (PP), which is frequently used in the manufacture of pumps. Thermally and chemically speaking, there are virtually no differences between the two materials. However, the similarity ends where the mechanical properties are concerned. Trials based on the sand-slurry method have shown that the abrasion resistance of the PE (material sample on top) is seven times higher than that of PP (middle) and even 1.6 times higher than that of steel (bottom). It is also more wear-resistant than, for example, cast iron or aluminum.
This high resistance to abrasion plays a vital role in many applications (e.g. slurry delivery in the wafer manufacturing in the photovoltaic industry, pickling baths in the electroplating industry, printing inks, lime slurry for wet desulfurization, ceramic mass and glazes in the ceramic industry). For explosion-proof areas (ATEX conformity) and for flammable liquids, PE conductive housing material is available.
Almatec pumps with PE housing: E-Series, C-Series, FUTUR Series, AHD/AHS Series, CXM Series