Liquid Filter Bag Manufacturer in India
ClaryFil filter bags in polypropylene, polyester, and nylon mesh. 1 to 300 micron. Fully welded felt construction with zero bypass. Manufactured in Ahmedabad since 1993, exported to the USA and UAE.
Gopani has manufactured high-performance liquid filter bags since 1993, supplying the ClaryFil range to 500+ industries across India, the USA, the Middle East, and Southeast Asia. Every ClaryFil bag is produced at our Ahmedabad facility from premium fabrics sourced from world-leading textile mills, under an ISO 9001:2015 certified quality management system.
The range covers the full span of industrial liquid filtration: polypropylene and polyester felt bags for depth filtration from 1 to 200 micron, and nylon monofilament mesh bags for surface filtration from 50 to 300 micron. All bags come in standard sizes #1 through #4 to fit most global housing makes and models, or in custom dimensions to your specification.
Three media. One welded standard.
Polypropylene Felt Filter Bags
The most chemically resistant option in the ClaryFil range, built for acid streams, alkali processing, solvent filtration, and aggressive chemical applications. Glazed polypropylene felt delivers efficient depth filtration with high dirt-holding capacity and low fibre shedding. The fully welded seam, bottom, and collar eliminate the bypass paths that stitched bags leak through.
- Micron ratings: 1, 3, 5, 10, 25, 50, 75, 100, 200 micron
- Max operating temperature: 80 C (PP collar)
- Media: polypropylene felt, glazed
- Construction: fully welded (bottom, seam, collar)
- Best for: chemical processing, acids and alkalis, solvents, paints and coatings, water treatment
Polyester Felt Filter Bags
Singed polyester felt combines mechanical strength with high temperature tolerance, holding its structure under elevated differential pressure. With a steel ring collar it operates up to 130 C, which makes it the specification of choice for hot process streams, textile dyeing, and high temperature chemical filtration.
- Micron ratings: 1, 3, 5, 10, 25, 50, 75, 100, 200 micron
- Max operating temperature: 80 C (PP collar), 130 C (SS 316 or zinc-coated steel ring)
- Media: polyester felt, singed
- Construction: fully welded, or sewn collar with welded seam and bottom for steel ring variants
- Best for: high temperature processes, textile, pharma, general industrial above 80 C
Nylon Monofilament Mesh Bags
Precision-woven nylon mesh for surface filtration with a sharply defined micron rating. NMO bags clean by backwashing or compatible solvent rinse and go back into service, which cuts operating cost significantly against felt bags in low-contamination applications.
- Micron ratings: 50, 75, 100, 150, 200, 250, 300 micron
- Max operating temperature: 80 C (PP collar), 130 C (SS 316 or zinc-coated steel ring)
- Media: nylon monofilament woven mesh
- Construction: sewn, with standard handles for easy installation and removal
- Reusable: yes, cleanable by backwashing or compatible solvent rinse
- Best for: food and beverage, pharmaceuticals, edible oils, cosmetics, coarse pre-filtration
Technical specifications
| Parameter | ClaryFil PP (Felt) | ClaryFil PE (Felt) | ClaryFil NMO (Mesh) |
|---|---|---|---|
| Micron range | 1 to 200 micron (9 standard ratings) | 1 to 200 micron (9 standard ratings) | 50 to 300 micron (7 standard ratings) |
| Max temp, PP collar | 80 C | 80 C | 80 C |
| Max temp, steel ring | Not applicable | 130 C | 130 C |
| Filter media | PP glazed felt | Polyester singed felt | Nylon woven mesh |
| Filtration mechanism | Depth filtration | Depth filtration | Surface filtration |
| Construction | Fully welded | Fully welded / sewn + welded | Sewn (with handle) |
| Collar options | PP | SS 316 | zinc-coated steel | PP | SS 316 | zinc-coated steel | PP | SS 316 | zinc-coated steel |
| Reusable | No | No | Yes, cleanable |
| Best for | Chemicals, acids, solvents | High temperature, general industrial | Food, pharma, reusable applications |
Standard sizes and flow rates
| Size | Dimensions | Max flow rate | Common application |
|---|---|---|---|
| #1 | 7" x 16" (178 x 406 mm) | 18 m3/hr | Batch processes, pilot scale, smaller systems |
| #2 | 7" x 32" (178 x 813 mm) | 34 m3/hr | Most common industrial size, highest flow and solids capacity |
| #3 | 4" x 8" (102 x 203 mm) | 6 m3/hr | Low-flow, side-stream or secondary filtration |
| #4 | 4" x 14" (102 x 356 mm) | 12 m3/hr | Compact systems, medium-low flow installations |
| Other | 4"x10", 4"x20", 4"x24", 7"x36" | On request | Custom dimensions also available |
Part number system
Every ClaryFil bag carries a traceable part code in the format: CFB - [Material] - [Micron] - [Size code] - [Layers] - [Fitment]. Quote the code and we ship the identical bag, every reorder.
| Field | Codes and meanings |
|---|---|
| Material | PO = polypropylene | PE = polyester | NMO = nylon monofilament |
| Micron | 1, 5, 10, 25, 50, 75, 100, 150, 200, 250, 300, 400 |
| Size code | 1 = 7"x16" | 2 = 7"x32" | 3 = 4"x8" | 4 = 4"x14" | 5 = 4"x10" | 6 = 4"x20" | 7 = 7"x36" | 2X = 7"x32" double |
| Layers | P = plain (no cover) |
| Fitment | W = welded | WH = welded + handle | H = handle | FC = flat collar | P = universal PP collar | SS = SS ring | Z = zinc-plated steel ring |
How to choose the right ClaryFil bag
Identify the particle size to remove
For fine depth filtration (1 to 25 micron), choose PP or PE felt. For coarser surface filtration that can be washed and reused (50 to 300 micron), choose nylon NMO mesh.
Check temperature and chemical compatibility
Aggressive acid or alkali streams up to 80 C: PP felt. High temperature streams up to 130 C: PE felt or nylon NMO with a steel ring collar. Food, pharma and cosmetics with reusability: NMO mesh.
Select your housing size
Size #2 (7 by 32 inch) is the most common industrial size with the highest flow at 34 m3/hr. Size #1 suits smaller batch systems. Sizes #3 and #4 fit low-flow or compact installations. Tell us your housing make and model and we confirm the fit.
Choose your collar or ring
Universal PP collar for most chemical and general industrial work. SS 316 ring for high-pressure, food-grade, or pharmaceutical applications, which also enables the 130 C rating. Zinc-coated steel ring as a cost-effective alternative where food-grade certification is not required.
Standard or custom
Standard configurations are stocked for fast dispatch. For non-standard sizes or custom media and micron ratings, our team engineers bags to specification with low minimum order quantities.
Why 500+ industries specify ClaryFil
Welded, not stitched
ClaryFil PP and PE bags are fully welded at the bottom, seam, and collar, eliminating the bypass paths that occur in cheaper stitched bags. Leak-safe design is not optional in regulated processes.
Certified and traceable
Every bag is produced under an independently audited ISO 9001:2015 system with full batch traceability and certification documentation for procurement teams worldwide.
Premium media, treated properly
Filter media sourced from leading global textile mills, glazed and singed to minimise fibre shedding: a key requirement in pharmaceutical and food applications.
Complete system from one source
Filter bags, bag filter housings in stainless steel, PP, and uPVC, and filter cartridges, all from one manufacturer. Our engineers size the complete system for your application.
Custom bags with low MOQs
Non-standard sizes and custom media produced to specification, with engineering consultation included and short lead times.
Export discipline
Established exporter to the USA, UAE, Saudi Arabia, Southeast Asia, and Africa. Packaging, documentation, and freight partners supporting DDP and CIF terms.
ClaryFil filter bags: your questions, answered
What is a liquid filter bag and how does it work?
A liquid filter bag is a permeable textile bag installed inside a bag filter housing. Process liquid is pumped into the housing and forced through the bag, which captures suspended particles either within the bag fibres (depth filtration, felt bags) or on the bag surface (surface filtration, nylon mesh bags). Clean filtered liquid exits through the housing outlet. Filter bags are the most economical choice for high-flow, high-contamination liquid filtration.
What micron ratings are available in ClaryFil filter bags?
ClaryFil PP and PE felt bags are available in 9 standard ratings: 1, 3, 5, 10, 25, 50, 75, 100, and 200 micron. ClaryFil NMO nylon mesh bags are available in 7 standard ratings: 50, 75, 100, 150, 200, 250, and 300 micron. Additional ratings can be manufactured on request. Contact Gopani for application-specific guidance on selecting the correct micron rating.
What is the maximum operating temperature for ClaryFil bags?
ClaryFil PP felt bags and any bag with the universal polypropylene collar are rated to a maximum of 80 C. ClaryFil PE polyester felt bags and nylon NMO mesh bags used with a stainless steel 316 or zinc-coated steel ring collar are rated to a maximum of 130 C. Never exceed the rated temperature; doing so will damage the bag and may compromise filtration integrity.
What are the standard ClaryFil filter bag sizes?
ClaryFil bags are produced in four standard industry sizes: Size #1 (7 inch diameter by 16 inch long, max 18 cubic metres per hour), Size #2 (7 by 32 inch, max 34 cubic metres per hour), Size #3 (4 by 8 inch, max 6 cubic metres per hour), and Size #4 (4 by 14 inch, max 12 cubic metres per hour). Additional sizes including 4x10, 4x20, 4x24 and 7x36 inch are available, and custom dimensions are produced on request.
What collar and ring options are available?
Three options are available. The universal polypropylene (PP) collar suits most chemical and industrial applications and is rated to 80 C. The stainless steel 316 ring is for food-grade, pharmaceutical, high-pressure, or high-temperature applications up to 130 C. The zinc-coated steel ring is a cost-effective alternative to SS for applications that do not require food-grade certification. The collar must match your housing inlet ring specification.
What is the difference between felt bags and nylon mesh bags?
Felt bags (PP and PE) are depth filtration media: particles are trapped within the fibre matrix through the thickness of the bag. They are available in finer ratings (1 to 200 micron), hold large quantities of solids, and are single-use. Nylon monofilament mesh bags are surface filtration media: particles are captured on the surface at a precisely defined mesh opening size (50 to 300 micron). Mesh bags hold less solids but can be washed and reused, making them more economical in lower-contamination applications.
Can ClaryFil nylon mesh bags be washed and reused?
Yes. ClaryFil NMO nylon monofilament mesh bags are designed for cleaning and reuse. They can be backwashed with clean water or rinsed with a compatible solvent, depending on the contaminant. The number of reuse cycles depends on the application; contact Gopani for guidance. PP and PE felt bags are single-use and should not be washed, as the fibre structure compresses and loses filtration efficiency.
What is the difference between polypropylene and polyester filter bags?
PP (polypropylene) felt bags offer excellent chemical resistance across a broad pH range, suitable for acids, alkalis, and many solvents, up to a maximum of 80 C. PE (polyester) felt bags offer good chemical resistance with significantly higher temperature tolerance, up to 130 C when used with a steel ring collar. Choose PP for chemical aggressiveness; choose PE when temperature exceeds 80 C.
Can Gopani manufacture custom ClaryFil bags to non-standard dimensions?
Yes. Gopani engineers custom ClaryFil bags to non-standard sizes, including 4x10, 4x20, 4x24, and 7x36 inch as listed in our catalog, as well as fully bespoke dimensions. Custom micron ratings and custom media combinations are also available. Minimum order quantities are kept low for trial orders. Send your housing dimensions and application details to sales@gopani.com.
Does Gopani export ClaryFil filter bags to the USA and Middle East?
Yes. Gopani is an established exporter with customers in the USA, UAE, Saudi Arabia, Qatar, Southeast Asia, and Africa. Our manufacturing and warehousing facility in Ahmedabad, Gujarat supports international orders with competitive lead times, and we work with established freight partners for DDP and CIF shipment options. For international enquiries, contact sales@gopani.com or call +91 706 901 8049.
Send us your housing details. We will confirm the exact bag.
Housing make and model, fluid, temperature, and target micron rating. Our team responds with the part code, the price, and the lead time.