Name: Filter Bag
Brand: JX Filtration

Description

JX Filtration offers a full range of filter bags in standard sizes 1 through 4, with micron ratings from 0.5 to 1000 μm, in polypropylene, polyester, nylon, and PTFE media. Designed as the consumable filtration element inside bag filter housings, these bags deliver high solids retention with low pressure drop and fast changeout—economical, reliable, and compatible with most standard bag housings.

A filter bag is a fabric or mesh filtration element shaped into a cylindrical or tapered bag, secured by a ring at the top and seated inside a support basket within a bag filter housing. Liquid enters the housing, flows through the bag from inside to outside, and exits as clean filtrate. Solids are retained within the bag, which is removed and replaced or cleaned when differential pressure rises. Unlike cartridge elements, filter bags offer high dirt-holding capacity and are available in reusable or disposable formats.

Working Principle

Filtration Flow Path: Liquid enters the housing through the inlet and is directed into the open top of the filter bag. The bag is supported by an internal stainless steel mesh basket that prevents collapse under differential pressure. Liquid passes through the bag medium from the inside surface outward, depositing solid particles on the inner surface and within the depth of the felt or mesh structure. Clean filtrate exits through the basket wall and out the housing outlet.
Media Types & Capture Mechanism: Needle felt bags capture particles throughout the depth of the nonwoven fiber matrix, providing high dirt-holding capacity and gradual pressure increase. Mesh bags—woven from monofilament or multifilament yarn—rely primarily on surface capture with precise, uniform pore openings for absolute-rated retention. The choice between felt and mesh determines whether the bag is optimized for loading capacity or for sharp particle cut-off.
Replacement & Reuse: When differential pressure reaches the recommended changeout point, the housing is opened and the bag removed. Disposable bags are discarded; reusable bags can be washed or backwashed and reinstalled, depending on the application and contamination type. The housing and support basket remain in service indefinitely.

Advantages

High dirt-holding capacity – Felt media captures solids throughout the depth of the fiber matrix, extending service life between changeouts compared to surface-only media
Broad micron range – Available from 0.5 μm to 1000 μm to suit applications from fine clarification to coarse bulk solids removal
Multiple material options – Polypropylene for general chemical resistance, polyester for higher temperature and hydrolysis resistance, nylon for abrasion resistance, and PTFE for extreme chemical and thermal conditions
Fast changeout – Bag replacement takes only minutes, reducing downtime and labor cost compared to cartridge-style elements
Reusable options – Many bag types can be cleaned and reinstalled, lowering long-term consumable cost
Low fiber migration – Welded or fused seam construction eliminates loose fibrous edges that can shed into the filtrate
Standard and custom sizes – Sizes 1–4 fit most common housings; custom dimensions and ring configurations available
Food-grade and FDA-compliant materials – Available for food, beverage, and pharmaceutical contact applications