Gopani manufactures ClaryFil™ custom filter bags engineered precisely to your process specifications. When standard off-the-shelf bag filters do not fit your housing, media requirement, or operating conditions, our ISO 9001:2015 certified facility in Ahmedabad, Gujarat, India can produce bespoke filtration solutions with any combination of filter media, micron rating, bag dimensions, collar type, and construction method. As one of India’s leading custom filter bag manufacturers since 1993, we serve OEM partners, private-label buyers, and end-users with non-standard liquid filtration requirements across 40+ countries.
Whether you need an unusual bag size for a legacy housing, a specialty media not available in standard bags, or a private-label filter bag programme for your distribution business, Gopani’s engineering and manufacturing team can deliver.
| Parameter | Options Available |
|---|---|
| Filter Media | PP felt (glazed), PE felt (singed), NMO mesh, PP meltblown, PTFE felt, specialty media on request |
| Micron Ratings | 0.5 to 1200 µm (any standard or custom rating) |
| Bag Sizes | Standard #1, #2, #3, #4 plus any custom dimensions (diameter, length) |
| Collar/Fitment | Universal PP Collar | SS 316 Ring | Zinc-Plated Steel Ring | Custom flanges |
| Construction | Fully Welded | Sewn + Welded | Sewn (for specific collar types) |
| Special Features | Handle loops, drawstrings, multi-layer media, pre-filter liners, metal mesh support |
| Labelling | Gopani-branded, OEM white-label, or private-label with your brand |
| Certification | ISO 9001:2015 | Made in India |
Beyond the global standard sizes #1 through #7, plus #2X, Gopani can manufacture filter bags in custom diameters and lengths to fit legacy housings, proprietary equipment, or specialised OEM systems. Common non-standard sizes include 4″×10″, 4″×20″, 4″×24″, and fully bespoke dimensions. Provide your housing drawing or existing bag sample, and our engineers will match the exact specifications.
Have a non-standard filtration requirement? Share your housing specs, process conditions, or an existing bag sample, and our engineers will design a custom ClaryFil™ filter bag to match.
What is the minimum order quantity for custom filter bags?
Gopani offers low MOQs for custom bags, making it feasible to order pilot batches for testing before committing to volume production. Exact minimums depend on the media type and bag configuration. Contact our team with your requirements for a specific MOQ and lead time.
Can Gopani manufacture bags for OEM or private-label programmes?
Yes. We offer full OEM white-label and private-label manufacturing. Bags can be produced with your branding, part numbers, and packaging specifications. Many filter housing manufacturers and distributors worldwide rely on Gopani as their contract manufacturing partner for liquid filter bags.
How do I specify a custom filter bag if I only have a sample?
Send us your existing bag sample or a dimensioned drawing, and our engineering team will reverse-engineer the specifications: media type, weight, micron rating, dimensions, collar type, and construction method. We will then produce a matched or improved replacement.
What specialty media are available beyond PP, PE, and NMO?
Gopani can source and fabricate bags from PTFE felt (for extreme chemical resistance), polypropylene meltblown (for oil adsorption), multi-layer composites, and other specialty filtration media. If you have a specific media requirement, our procurement and engineering teams will evaluate availability and feasibility.
What is the typical lead time for custom filter bags?
Standard custom orders are typically produced within 2 to 4 weeks from specification approval, depending on media availability and order volume. For urgent requirements, expedited production may be available. First-time orders with sample approval may take slightly longer to account for the engineering review and sample sign-off process.
Gopani offers custom filter bags in non-standard sizes (e.g., 4″x10″, 4″x20″, 7″x36″ and fully bespoke dimensions), special micron ratings outside the standard range, choice of fabric (PP felt, PE felt, NMO mesh), and custom collar materials (PP, SS 316, zinc steel).
Gopani accepts low minimum order quantities for custom filter bags. Contact our team with your specifications for a quotation – we regularly supply small prototype batches as well as large production runs.
Lead times for custom filter bags depend on specifications and order quantity. Standard custom orders are typically completed in 2 to 4 weeks. Contact Gopani with your requirements for an accurate lead time.
Gopani is ISO 9001:2015 certified. All custom filter bags are manufactured under our quality management system with batch traceability, ensuring consistent performance to your specified micron rating and dimensions.