Huahao Sealing manufactures carbon graphite seal rings, bushings, bearings, and split rings for pumps, mechanical seals, chemical equipment, and OEM programs.
European and North American buyers look for stable supply, quality control, and engineering communication. This page shows a verifiable chain: material selection, impregnation, precision machining, final inspection, and export packing.
Resin/antimony/copper impregnated graphite billets, re-impregnated for density.
CNC turning of seal ring faces and I.D./O.D., tolerances controlled throughout.
Full dimensional, face, visual and key performance checks before shipment.
Standard and custom sizes packed and shipped in batches.
Resin, antimony, copper and other grades selected by media, temperature, pressure, and duty.
CNC turning, I.D./O.D. machining, face lapping, grooving, holes, and custom profiles.
Dimensional, face, visual, hardness, and application-critical checks before shipment.
Drawings, samples, batch specs, replacement models, and long-term supply programs.
Every batch is fully inspected for dimensions, seal faces, appearance and key performance parameters before shipment. The material test reports below are available for download; reports for other grades can be provided on request.
Confirm media, temperature, pressure, speed, mating material, and installation dimensions.
Select graphite grade and impregnation for wear, corrosion, dry running, or submerged service.
Machine I.D., O.D., height, faces, grooves, holes, and special geometry per drawing.
Check dimensions, faces, appearance, packing labels, and shipment protection.
Transparent production environment and strict quality control — on-site visits and remote video factory tours supported.
