Español
русский
Français
عربي
Italiano
Deutsche
中文
Filter bag selection affects filtration efficiency, operating cost and discharge compliance. The wrong industrial filter bag can cause bypass, bag rupture, short service life and downtime. This guide covers liquid filter bag selection in four steps: material, micron rating, size and ring type.
Why Does Filter Bag Selection Matter?
A filter bag captures particles from liquid. If it is incorrectly selected:
● The bag bursts under high pressure.
● Chemical incompatibility causes swelling or dissolution.
● Frequent replacement increases labor and consumable costs.
● Particles pass through and contaminate downstream equipment.
For how to choose liquid filter bag in industrial processes, match the bag to fluid, particle size, temperature and flow rate.
Which Filter Bag Material Should You Choose?
| Material | Max Temp | Micron Range | Best For |
| PP | 80°C | 1 - 100 μm | Water treatment, weak acids/alkalis |
| Nylon | 160°C | 5 - 1200 μm | High-solid, high-pressure filtration |
| Nomex | 200°C | 1 - 100 μm | High-temperature filtration |
| Polyester | 150°C | 1 - 200 μm | General industrial filtration |
| For PP vs nylon filter bag, PP is more chemical-resistant and lower cost; nylon offers higher strength and temperature resistance. For Nomex filter bag for high temperature, Nomex handles up to 200°C. For filter bag material for acid filtration, PP or Nomex is often preferred. | |||
What Micron Rating and Size Do You Need?
Use a Filter Bag micron rating chart:
| Application | Micron Rating |
| Coarse pre-filtration | 50 - 200 μm |
| General water treatment | 5 - 50 μm |
| Fine chemical filtration | 1 - 25 μm |
| Polishing filtration | 1 - 5 μm |
| For best filter bag for water treatment, start with 25 - 50 μm for pre-filtration and 5 - 10 μm for final filtration. | |
Use a filter bag size selection guide:
| Bag Size | Dimensions | Typical Flow |
| Size #1 Filter Bag | 7" × 16.5" | Low to medium |
| Size #2 Filter Bag | 7" × 32" | Medium to high |
| Size #3 Filter Bag | 4" × 8" | Low |
| Size #4 Filter Bag | 4" × 14" | Low to medium |
| For filter bag size #1, #2, #3, #4 and filter bag ring type selection, match the bag to your housing, flow rate and chemical compatibility. | ||
What Else Should You Check?
● Chemical compatibility - check filter bag temperature and chemical compatibility.
● Certification - choose FDA-compliant bags for food, beverage and pharmaceutical use.
● Replacement frequency - for filter bag replacement frequency, monitor differential pressure.
● Felt vs mesh - for felt vs mesh filter bag, felt offers depth filtration; mesh offers surface filtration.
Conclusion
Filter bag selection requires matching material, micron rating, size and ring type to your process. Use the material comparison table, filter bag micron rating chart and filter bag selection criteria for water treatment to avoid bypass, rupture and high replacement costs. For industrial filter bag and liquid filter bag selection, Hongtek provides PP, nylon, Nomex and other filter bags. Contact our filtration engineers for a Hongtek filter bag selection guide.
Hongtek Filtration Co., Ltd.
Copyright © Hongtek Filtration Co., Ltd. All Rights Reserved | Sitemap
