Cartridge Filter Manufacturer in India
Melt blown, string wound, and pleated cartridges from 0.5 to 150 micron, manufactured fibre-to-filter in Ahmedabad since 1993. We spin our own yarn, wind on CNC machines, and test every batch, and map any make you run today to its Gopani equivalent.
Melt Blown Cartridges (RO Protect)
Graded-density virgin PP depth cartridges, 0.5 to 25 micron, thermally bonded with zero binders. Two to three times the dirt-holding capacity of uniform-density spun cartridges.
View rangeString Wound Cartridges (Clarywound)
CNC precision-wound depth cartridges from our own yarn plant. Eight variants across PP, cotton, glass fiber, nylon, polyester, and BICO media, up to 350 C with glass fiber on SS core.
View rangePleated Cartridges (Clarypleat)
High-area pleated elements in PP, PES, PTFE, PVDF, and Nylon 66, from nominal clarification to membrane-grade duty. Twelve variants including CPU, TMP, and HF.
View rangeActivated Carbon (ClaryCarb)
Coconut shell carbon block cartridges for chlorine, taste, odour and organics, plus Cabot Norit extruded, granular and powdered carbon.
View rangeTwo ways a cartridge holds dirt
Every cartridge is either a surface filter or a depth filter. A surface filter stops solids on the face of its media, as a pleated or mesh element does. A depth filter holds them through the thickness of the media, as melt blown and string wound elements do. Plants use depth cartridges where the load is heavy or variable and as pre-filters, and surface or pleated cartridges where a fine, tight rating decides product quality or protects a membrane. Most well-run trains use both, in that order.
What the wrong construction costs
A fine pleated element on a dirty stream blinds in days and turns a cheap stage into the most expensive one in the plant. A polymer depth cartridge in hot or aggressive duty softens and lets solids through. A cartridge that sheds fibre or foams puts its own media into the product. The cost is rarely the element price: it is change-out labour, lost production and damage to the membrane, resin bed or product the cartridge was bought to protect.
Which construction fits your duty?
| Parameter | Melt Blown (RO Protect) | String Wound (Clarywound) | Pleated (Clarypleat) |
|---|---|---|---|
| Micron range | 0.5 to 25 micron | 0.5 to 150 micron | Nominal to membrane grade |
| Mechanism | Graded-density depth | True depth, honeycomb wound | High-area surface and depth |
| Max temperature | 80 C | 350 C (glass fiber on SS core) | Media dependent (PTFE highest) |
| Strength | Economics at volume, RO pretreatment | Dirt capacity, harsh chemistry, heat | Efficiency, service life, fine ratings |
| Typical duty | RO and membrane protection, utility water | Electroplating, condensate, chemicals | Pharma, food, final filtration |
Lengths across the range: 5 to 70 inch, standard and jumbo diameters. A single 10 inch cartridge handles roughly 1 m3/hr; our engineers size element count from your actual flow and solids, not from a brochure curve.
Other cartridge formats
| Format | Construction | Where it fits | Details |
|---|---|---|---|
| Activated carbon (ClaryCarb) | Coconut shell carbon block | Chlorine, taste, odour and organics in water | Activated carbon page |
| Washable net | Polymeric net protected by a cage | Coarse pre-filtration; cleaned and reused | On enquiry |
| Capsule filters | Pleated PP, PES, PTFE or nylon membrane in a disposable capsule | Laboratory, pilot and small-scale liquid and gas filtration | Pleated page |
| Sintered metal (Clarysynt) | Sintered powder, mesh or metal fibre | Heat, solvents, backwashable duty | Sintered metal technology |
| High flow | Large-diameter pleated and depth elements | Large flows where element count drives cost | High flow family |
| Anti-scale cartridges (CPP HA) | Melt blown PP block with polyphosphate | Water lines that scale | Filtration systems |
End fittings and seals
| Fitting | Description | Typical housing |
|---|---|---|
| DOE | Double open end with flat gaskets | Standard multi-cartridge and water housings |
| SOE 222 flat or fin | Single open end with 222 O-rings | Sealed industrial and sanitary housings |
| SOE 226 flat or fin | Single open end with 226 O-rings | Bayonet-style housings |
| Code-T and threaded | Stud nut or internal thread (for example M33 x 1.5, G-1 inch) | Condensate polishing and long-element housings |
| Seal materials | Silicone, FKM (Viton), Buna-N (NBR), EPDM; PTFE, E-FKM and PTFE-encapsulated FKM on some lines | Chosen for fluid and temperature |
Fittings and seals available depend on the line; each sub-family page lists its own. Tell us your housing make and model and we confirm the fitting.
Cartridge filters: direct answers
Which cartridge constructions does Gopani make?
Melt blown (RO Protect), string wound (Clarywound) and pleated (Clarypleat) cartridges, plus activated carbon blocks (ClaryCarb), sintered metal (Clarysynt), high flow, washable net and capsule formats. Each has its own page with ratings, dimensions and fittings.
How do I choose the right cartridge?
Start with the particle size you need to remove, then the fluid, flow, temperature and pressure, and how much dirt the element must hold. Depth cartridges (melt blown, string wound) suit heavy loads and pre-filtration; pleated cartridges suit fine and absolute-rated duty. Send those details and we recommend the construction and grade.
Can Gopani cartridges replace the make I use today?
Gopani cartridges are made to standard international dimensions and end-cap configurations, so most can be supplied as dimensional equivalents to the cartridges plants already run. Send your current part number or its dimensions, fitting and rating, and we return a cross-reference. We state fit and format equivalence; performance on your duty is proved with a sample.
Do you make custom cartridges?
Yes. Custom lengths, ratings, media, cores and end-cap configurations are made to order for specific duties and for OEM programmes.
What is a washable net cartridge for?
Coarse pre-filtration. A polymeric net protected by a cage traps large particles, is cleaned and put back into service, and extends the life of the finer cartridges downstream.
What we can document
Cartridges are made in Ahmedabad under an ISO 9001:2015 quality management system. Our catalogue states that every melt blown production batch is checked for bubble point, differential pressure and filtration efficiency, and that pore-size, pressure-drop and burst-strength tests are standard on string wound export orders. Send your current part number and we return a written cross-reference to the Gopani equivalent, with a sample to prove it on your line.
Send your current cartridge part number.
Any make. We map it to the Gopani equivalent, quote the change-out economics, and ship a sample to prove the service life claim on your line.