The quality of the filter plate of the plate and frame filter press directly affects the service life of the filter press. So, what are the filter plate materials of the plate and frame filter press? The filter plate materials mainly include cast iron, glass, polypropylene material, stainless steel, composite rubber plate, etc. The filter plate made of polypropylene material is the most cost-effective and has a wide range of uses. The following is a detailed analysis of the performance characteristics of different material plate and frame filter press filter plates.
- Natural rubber filter plates, especially diaphragms, are still good with natural rubber, with good elasticity, but poor strength.
- Aluminum filter plate is the lightest among all metal filter plates, but relatively speaking, it has poor resistance to acid.
- Cast iron filter plate, heavy weight, poor acid resistance and extremely high temperature resistance. Only the sealing surface, in fact, must be made of organic materials, so there are certain limitations.
Plate and frame filter press filter plate - Stainless steel filter plate has better acid and alkali resistance, but the price is the highest among all filter plates. After all, the material itself is expensive, and the machining time is very long.
- PVDF is the organic material with the best acid resistance and temperature resistance. The normal temperature resistance can reach about 150°, but the alkali resistance is extremely poor.
6.PP is currently the most commonly used, that is, high molecular polypropylene. This material is a colorless, odorless, non-toxic, translucent solid substance with high strength, toughness and high wear resistance. Very good resistance to various acids and bases, including the strongest acid, hydrofluoric acid. However, the operating temperature range is relatively narrow. It can only withstand a material of 70° for a short time at most. It is resistant to corrosion by acid, alkali, salt solution and various organic solvents below 80 °C, and can be decomposed under high temperature and oxidation.