Fibre to filter. We spin the yarn, so we control the cartridge.
Eight Clarywound variants, CNC precision-wound in Ahmedabad from our own yarn. 0.5 to 150 micron, media from polypropylene to glass fiber, service temperatures to 350 C, and 3 to 5 times the dirt capacity of surface filters.
The Clarywound range
Clarywound Extreme
Flagship CNC-wound graded-density matrix for the hardest continuous duty
Clarywound 3X
Three-layer depth construction, 2 to 3 times longer service life
Clarywound Ultra
Cost-optimized industrial grade for high-volume duty
Clarywound GF
Glass fiber media for high temperature and aggressive chemistry
Clarywound BICO
Bicomponent fiber on polyester base, rated to 130 C
Clarywound Nylon
Nylon yarn on stainless core, rated to 140 C
Clarywound CPU
Purpose-built for power plant condensate polishing
Clarywound Cotton SS
Cotton media on stainless core, rated to 120 C
Media and temperature matrix
| Media / core | Max temperature | Typical duty |
|---|---|---|
| PP on PP core | 80 C | Water treatment, RO prefiltration, general chemical |
| Cotton on SS core | 120 C | Oils, condensate, food-adjacent duty |
| Polyester on SS core | 121 C | Hot aqueous and mild chemical streams |
| BICO on polyester | 130 C | Higher-temperature industrial filtration |
| Nylon on SS core | 140 C | Solvents and elevated temperature chemistry |
| Glass fiber on SS core | 350 C | Hot gases, condensate polishing, extreme duty |
Ratings: 0.5 to 150 micron, custom on request. Lengths 5 to 70 inch. Cores in PP, SS 304/316, ABS, glass-filled PP. Certified ISO 9001:2015, ISO 14001, ISO 45001; RoHS compliant; NSF 42 and FDA-grade PP on request. Standard configurations dispatch in 3 to 5 working days.
String wound cartridges: direct answers
What temperatures can Clarywound cartridges handle?
It depends on the media and core combination: PP on PP core to 80 C, cotton on stainless core to 120 C, polyester on stainless to 121 C, BICO to 130 C, nylon on stainless to 140 C, and glass fiber on stainless core to 350 C. Matching media and core to your stream temperature is part of our specification service.
Why does in-house yarn manufacturing matter?
Because the yarn decides the filter. Gopani spins its own yarn, which controls fibre quality, density gradient, and cleanliness before winding even begins. There are no resin binders, lubricants, antistatic agents, or release agents in the cartridge, and the honeycomb pattern is wound on CNC machines for repeatable pore structure from the first cartridge to the ten-thousandth.
What micron ratings and sizes are available?
Standard ratings run 0.5, 1, 5, 10, 20, 25, 30, 50, 75, 100, and 150 micron with custom ratings on request. Lengths from 5 to 70 inch, standard 2.5 inch outer diameter, 4.5 inch big-blue format available, with PP, stainless 304/316, ABS, or glass-filled PP cores. Change-out differential pressure is 2.5 bar at 21 C.
When should I pick string wound over melt blown?
Pick string wound when the stream is hot, chemically aggressive, or heavily loaded with solids: electroplating baths, condensate polishing, textile dyeing, chemical processing. True depth construction holds 3 to 5 times more dirt than surface filters. For ambient RO pretreatment at high volumes, melt blown usually wins on economics; we will tell you honestly which one your numbers favour.
Hot, dirty, or chemically nasty stream?
That is Clarywound territory. Send temperature, chemistry, and solids load; we answer with media, core, micron rating, and a sample.