In the filter system, the No. 2 filter bag usually refers to the size of 180*810mm, and the ring mouth includes stainless steel ring, galvanized steel ring, polyester plastic ring, polypropylene plastic ring, and the plastic ring is divided into: inner turn ring , Outturn ring, flat ring, W ring including a variety of different bag bottom, bag top design. According to different materials, filter bags can also be called polypropylene filter bags, polyester filter bags, nylon filter bags, nylon filter bags, vinyl filter bags, polypropylene filter bags, polyester filter bags, stainless steel mesh filter bags, oil removal filter bags , Double filter bags, PP mesh filter bags, advanced filter bags, microfiber filter bags and so on. Different materials have different working conditions. Next, this article will introduce some working conditions for No. 2 filter bags of different materials.

Polypropylene (PP): The No. 2 filter bag of this material is suitable for the working conditions of acid and alkali resistance, high temperature resistance of 90 °C, good heat resistance, melting point of 164~170 °C, and the product can be sterilized at temperatures above 100 °C. bacteria. Under the action of no external force, it will not deform at 150 °C. The embrittlement is -35 °C, and embrittlement occurs below -35 °C, and the heat resistance is not as good as PE.

Polyester (PE): This product is made of polyester fiber filter cloth, and the filtration precision is optional from 0.5μm to 300μm. It is widely used in electronics, semiconductors, chemicals, food, beverages, paints, paper industry, automobile manufacturing, ink, Resin, water treatment and other industrial fields. Polyester filter bag No. 2 can withstand the operating temperature of 130 ℃ under dry conditions; continuous work above 130 ℃ will harden; fade; become brittle, and the temperature will also weaken its strength.

Nylon (NMO): It is made of high-strength nylon woven mesh, and all of them use a unique hemming technology to prevent the leakage of needle holes to the greatest extent, and directly trap impurities larger than their own meshes in the filter on the surface of the material; diameter Particles smaller than the mesh size pass through the mesh and enter the downstream, so the nylon monofilament filter bag achieves surface filtration, and the smooth surface is also easy to clean and can be used repeatedly. Nylon No. 2 filter bags in the food and beverage industry are recommended to use 80 meshes to 350 meshes; for the chemical industry, 80 to 150 meshes are recommended. Solvent resistance, strong alkali resistance, temperature resistance of 150 degrees to 170 degrees; and good resistance to deformation and wear resistance. The optimal pressure for replacement is 0.10mpa, and the maximum pressure does not exceed 0.18mpa.