Bag Filter
Bag Filters provide a cost-effective, high-performance solution for diverse fluid filtration needs. Distributed by Cong Thanh – Envitech, they come in various configurations and media options, supporting micron ratings from 1 to 1500 µm. Compatible with industry-standard filter bag housings (1-9), they’re ideal for RO pre-filtration, chemical processing, oil & gas, food & beverage industries.

Bag Filters offer a cost-effective and high-performance solution for a wide range of fluid filtration applications. Distributed by Cong Thanh – Envitech, these filters are available in multiple configurations and media options, supporting nominal micron ratings from 1 to 1500 µm. Designed to be interchangeable with industry-standard #1 through #9 filter bag housings, they are ideal for use in RO pre-filtration, chemical processing, oil & gas, food & beverage, and more.
Key Features
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Micron Ratings: 1 to 1500 nominal
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Operating Temperature: Up to 200°F (depending on media)
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Efficiency: From 50% to 99% nominal
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Compatibility: Fits all standard filter bag housings (#1 to #9)
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Reusable lifting handles for easy removal and replacement
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Sure Seal Flange Design for enhanced sealing in multiple vessel types
Media Options
Filter Media | Nominal Efficiency | Temperature Resistance | Application Notes |
Polyester/Polypropylene Felt | 50% | Up to 200°F | General applications, cost-effective |
Polyester Multifilament Mesh | 90% | – | High dirt-holding capacity |
Polypropylene Mesh | 90% | Up to 200°F | Superior acid resistance vs. nylon |
Nylon Monofilament Mesh | 90% | – | Durable, precise filtration |
Polypropylene Hi-Efficiency Microfiber | 95% | – | Fine particulate retention |
Polypropylene Oil Removal | 95% | – | For oil and hydrocarbon separation |
Polyester/Polypropylene Graded Density | 99% | – | High dirt loading, long service life |
Teflon | 95% | High temperature | Aggressive chemical applications |
Cotton | 90% | – | Compatible with organic acids, beverages |
Oil-Absorbing Inserts | – | – | Absorbs 25× own weight in oil |
Lifting Device Options
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Galvanized carbon steel
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Stainless steel
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Molded plastic
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Woven fabric
Applications
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RO membrane protection
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Sea water sand & algae removal
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Amine, oil, gas, glycol, biodiesel filtration
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Gas purification
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Offshore & onshore oil platforms
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Potable water, dairy, food & beverage industries
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Pulp, poultry & meat washdown
Sure Seal Flange System – UFI Exclusive Design
The UFI Sure Seal Flange enhances installation versatility, allowing a single bag design to fit both horizontal and vertical filter vessels. It includes:
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Outer locking flange for secure fit inside vessel groove
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Bottom and media seals within support basket
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Reinforced lift handles for heavy-duty use
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Top extension for over-the-lid sealing applications
For engineers and operators seeking durable, versatile, and easy-to-maintain liquid filtration systems, Bag Filters from Cong Thanh – Envitech provide unmatched value and performance. Contact us today to request technical data sheets, sizing support, or customized filter solutions.