Kaxite Sealing manufactures PTFE packing from 100% virgin PTFE yarn by braiding — no lubricant, no graphite, no additives that could be released into the process. Chemically inert across pH 0–14, service range -268 to +288 °C with short-term peaks to 315 °C, pressure rating 15 bar rotating / 100 bar reciprocating / 150 bar static, maximum shaft speed 2 m/s and density 1.3 g/cm³. FDA 21 CFR 177.1550 and USP Class VI grades are available for food, sugar, chocolate, pharmaceutical and fine paper service. Procurement teams choose us for factory-direct bulk pricing, full material traceability and 7–15 day lead times.
Four reasons procurement teams in chemical, food, pharmaceutical and water treatment industries specify Kaxite as their PTFE packings supplier.
Buy straight from the braiding line. No trading markup, no hidden broker fees — landed cost reductions of 15–30% compared with reseller channels. MOQ from 5 kg or 50 rings per size.
No lubricant, no graphite, no additives. The yarn contains nothing that can be released into the process, making it non-toxic and non-marking for food, pharmaceutical and ultra-pure service.
Every batch ships with a material certificate of analysis, FDA 21 CFR 177.1550 and USP Class VI declaration. Full audit trail from PTFE yarn lot to delivery.
Standard spools and pre-formed rings ship in 7–15 days. Custom cross-sections, die-formed rings and composite grades ship in 15–25 days. OEM marking available.
Braided gland packing from 100% virgin PTFE yarn with no lubricant, graphite or additives. Available in four engineered lines — virgin braided yarn, impregnated braid, composite graphite braid and expanded PTFE tape — to cover chemical service, food and pharmaceutical duty, and high-speed rotating equipment.
Each line is engineered for a distinct combination of chemical resistance, temperature and mechanical duty. Use this guide to shortlist the right grade before requesting a quotation.
100% pure white PTFE fibers. Highest chemical purity and non-marking. Standard choice for food, sugar, chocolate, pharmaceutical and fine paper service.
Color · WhiteGlass-fiber core braided and impregnated with PTFE dispersion. General chemical service, hot water and steam duty with improved structural integrity.
Color · White / GreyPTFE fibers combined with graphite fill for thermal conductivity and wear resistance. High-speed pumps, valves, hot oils and gases.
Color · Black100% expanded PTFE (ePTFE). Forms custom flange gaskets, thread seals and on-site valve stem packing. See our expanded PTFE tape for full specifications.
Color · WhiteSix industries where virgin or composite PTFE packing replaces graphite, aramid or asbestos in pumps, valves and agitators.
Pumps, valves, agitators and reactor seals handling aggressive acids, alkalis and solvents. Pairs with our PTFE ring gaskets for flange sealing.
Rotary and reciprocating equipment where non-toxic, non-marking packing is mandatory. FDA 21 CFR 177.1550 compliance with zero contamination risk.
Sterile pumps and agitators requiring USP Class VI compliance with no extractables. Pairs with our pure PTFE gaskets in hygienic process lines.
Stock pumps, bleach plant equipment and liquor-handling valves where non-marking packing prevents paper defects and dark streaking.
Municipal and industrial pump stations handling potable water and wastewater. FDA-grade grades available for potable-water contact.
Boiler feed pumps, condensate pumps and steam valves. Pairs with our PTFE hoses and graphite PTFE packing for high-temperature steam duty.
Selection depends on the chemical being sealed, operating temperature and pressure, shaft speed, and equipment type. For strong acids at high concentration, use virgin PTFE yarn (KX-PTFE-V). For general chemical service with abrasion, PTFE-impregnated braid (KX-PTFE-GI) is suitable. For high-temperature, high-speed rotating equipment, a graphite-filled composite (KX-PTFE-CG) is recommended for thermal dissipation.
Yes. Our virgin PTFE yarn packing (KX-PTFE-V) is manufactured from 100% pure PTFE resin meeting FDA 21 CFR 177.1550 and USP Class VI requirements. It is tasteless, odorless and will not contaminate the media — ideal for food processing, beverage, pharmaceutical manufacturing and drinking water systems.
Clean the stuffing box and shaft thoroughly. Install rings one at a time, staggering the joints by 90 degrees, using a split installation tool to seat each ring without damage. Tighten the gland follower hand-tight only initially, then re-tighten gradually after startup and thermal cycling until leakage is controlled to a slight drip for lubrication.
PTFE packing requires a slight amount of leakage for lubrication and heat dissipation — unlike mechanical seals. A controlled drip rate of 1–2 drops per minute per inch of shaft diameter is often acceptable. If leakage is excessive, tighten the gland follower gradually. Sudden heavy leakage usually indicates packing failure or improper installation.
PTFE has relatively low thermal conductivity, so high-speed and high-heat applications can build up heat — addressed by graphite-filled composite grades. It can cold-flow under sustained compressive load. It is not suitable for molten alkali metals or high-temperature fluorine gas. Always consult our engineering team for critical services.
PTFE is chemically inert to a far wider range of media, performs across a wider temperature range, and is non-toxic — unlike asbestos, which is a health hazard. PTFE also offers lower friction, reducing energy consumption and shaft wear compared with graphite or aramid alternatives.
Yes. Beyond standard spools and cross-sections, we supply pre-formed rings die-cut to your stuffing-box dimensions, custom cross-sections from 3 mm to 25 mm, and OEM marking. Send your shaft diameter, stuffing-box dimensions and grade preference for a quotation within 24 hours.
Send us your shaft diameter, stuffing-box dimensions, cross-section, grade preference or finished-part drawing. Our export team replies within 24 hours and confirms grade selection, lead time, packaging and documentation before you place a bulk order.
