Fibre to filter. We spin the yarn, so we control the cartridge.

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.

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.

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.

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.

It depends on the feed, the rating and the pressure drop you allow. Our catalogue gives a typical range from 2 weeks on very turbid borewell water to 6 months on relatively clean municipal feed. Replace when the pressure drop reaches the change-out value for the grade, and do not run cartridges to failure, which risks media migration.

Generally no. They are single-use elements: back-flushing does not restore the original pressure drop curve and can release trapped particles into the process. We do not recommend washing cotton cartridges for critical duty.

None for standard configurations, from single replacement cartridges to container loads. Custom specifications such as non-standard lengths, special cores or OEM labelling typically start at 500 to 1,000 pieces, depending on the configuration.

They are made to the standard outer diameters and lengths used by DOE and SOE housings, including housings from Pentek, Harmsco, 3M, Parker, Filtraflo and Indian makers. That is a statement of dimensional fit; tell us the housing model so we supply the right end cap and gasket.

In chemical dosing systems, surfactant-containing streams, or anywhere the minor processing additives in standard PP compounds could seed foam downstream. Non-foaming PP is a specially compounded resin with those additives removed, available across the range on request.

Clarywound GF is available in a heat-treated grade, in which the organic lubricants and binders from spinning and winding are burned off during firing, and a standard unbaked grade. The baked grade has no organic extractables, which matters in semiconductor and microelectronics duty. GF cartridges are usually supplied open-ended for housings with knife-edge or compression seals, and gas-filtration grades are available for compressed air, nitrogen, hydrogen and helium.

For qualified evaluations we send sample packs of typically 5 to 10 cartridges, dispatched within 2 to 3 working days once we have your application, rating, length and current supplier details.