This product is a core sealing element designed for the rotary shaft of screw air compressors. Featuring an imported PTFE (polytetrafluoroethylene) lip combined with a stainless steel metal housing, it is engineered specifically for shaft-end sealing under high-speed, high-temperature, and high-pressure operating conditions. Its primary function is to establish a reliable dynamic sealing barrier between the rotating shaft and the compressor housing — preventing compressed air and lubricating oil from leaking out of the chamber while simultaneously blocking dust, moisture, and contaminants from entering the equipment. This not only preserves the compressor's operational efficiency but also reduces energy consumption and extends the overall service life of the machine.

In terms of materials and craftsmanship, the sealing lip is made of high-purity PTFE, which boasts an extremely low friction coefficient. Compared with conventional rubber oil seals, it significantly reduces frictional resistance and energy loss during shaft rotation, while its excellent self-lubricating properties ensure stable performance even under marginal lubrication conditions. The outer housing is constructed from stainless steel, offering outstanding corrosion resistance — it resists rust and deformation in humid, salt-spray, or chemically aggressive environments, keeping the sealing structure firmly intact over the long term. For applications requiring even higher temperature tolerance, we also offer an FKM (fluoroelastomer) option capable of withstanding temperatures up to approximately 250°C, making it suitable for extreme conditions with wide temperature fluctuations and heavy contamination.

Regarding sealing performance and precision, the inner diameter tolerance is controlled within ±0.1mm, and the outer diameter is precisely matched to the housing bore. This eliminates both oil seal lip damage caused by an overly tight fit and leakage or eccentric wear caused by an overly loose fit. The lip geometry has been optimized and paired with a precision spring-energized design, maintaining uniform contact pressure even when the shaft experiences minor runout — delivering long-lasting, leak-proof performance. The product has passed rigorous resistance tests against oils, solvents, and various chemical media, and remains stable against swelling, hardening, or cracking when exposed to compressor lubricants, compressed air, and other industrial fluids.

In terms of durability and maintenance, this oil seal outlasts conventional rubber seals thanks to its wear-resistant materials and optimized lip design. Industry practice recommends preventive replacement of screw compressor shaft seals at approximately 12,000 operating hours or every 2 years. If you notice a drop in discharge capacity exceeding 8% compared to a new machine, or a noticeably shortened oil top-up interval, these are typical indicators that the seal has worn and should be inspected and replaced promptly. Under proper installation and maintenance conditions, this product comes with a one-year warranty for your peace of mind.

In terms of compatibility, this series of oil seals is widely compatible with multiple models of screw air compressors from leading brands such as Atlas Copco and CompAir. A comprehensive range of dimensions is available (e.g., 40×55×8mm, 80×100×10mm), and custom sizing can be accommodated based on your specific machine model or measured parameters. Whether you are an equipment repairer, an industrial end-user, or a distributor, you can find a precisely matched sealing solution here.

About Us — Your Trusted One-Stop Supplier of Air Compressor Parts

We are a professional manufacturer specializing in air compressor filters and spare parts, with over ten years of industry experience. Deeply committed to the air compressor aftermarket, our product range covers the full lineup of wearable components — air filters, oil filters, oil separators, oil seals, and other sealing elements. We operate on a direct-from-factory basis, cutting out middlemen to offer you competitive ex-works pricing and reliable supply stability. Every batch undergoes strict quality inspection before shipment to ensure dimensional accuracy, material performance, and sealing reliability meet our standards. We provide a one-year warranty, and our responsive technical support team is ready to assist you with part selection and installation guidance. Choosing us means choosing professionalism, reliability, and a long-term partnership.