Steel Ring, Liquid Filter Bags: Materials And Applications

Steel ring liquid filter bags are bag-shaped filtration devices used for liquid filtration, typically made from fibrous materials such as polyester, polypropylene, and polyamide. These materials exhibit excellent corrosion resistance, high temperature resistance, pressure resistance, and chemical resistance. Featuring high filtration efficiency, fast filtration speed, compact structure, and long service life, steel ring liquid filter bags are widely applied in liquid filtration processes across industries including food, chemical, pharmaceutical, electronics, and environmental protection.

Materials and Characteristics

The main materials of steel ring liquid filter bags include:

1. Polypropylene (PP) Filter Bag: Good wear resistance and high elastic recovery rate, suitable for high-temperature environments. Filtration precision ranges from 0.1–500 μm, with a maximum temperature resistance of 94°C.

2. Polyester (PE) Filter Bag: Excellent performance at room temperature, usable below 130°C. Filtration precision ranges from 1–300 μm.

3. Nylon (NMO) Filter Bag: High strength, good wear resistance, and strong chemical resistance, but with relatively high ductility.

4. Polytetrafluoroethylene (PTFE) Filter Bag: Outstanding thermal and chemical stability, capable of long-term use at 260°C and short-term use at an instantaneous temperature of up to 280°C.

Structure and Usage Method

Steel ring liquid filter bags are usually made from fibrous materials via needle-punched fabric, melt-blown, or sintered wire processes. Their structure consists of a filter bag body and a steel ring; the steel ring is used to fix the filter bag, enhance sealing performance, and reduce side leakage. Standard sizes of filter bags include 180×450mm, 180×810mm, 105×210mm, 105×345mm, etc., and customization is available based on equipment and requirements.

Application Fields

Steel ring liquid filter bags are widely used in the following fields:

Food industry: Liquid filtration during food processing to ensure food hygiene.

Chemical industry: Treatment of various chemical liquids to guarantee product quality.

Pharmaceutical industry: Filtration of medicinal liquids during pharmaceutical production to maintain drug quality.

Electronics industry: Liquid filtration in the electronics industry to ensure a clean production environment.

Environmental protection industry: Treatment of various industrial wastewater to meet discharge standards.

In conclusion, steel ring liquid filter bags have become an indispensable component in industrial filtration due to their excellent performance and wide range of applications.