DO, DF and XY floating oil seals for construction, mining and heavy-duty equipment — built for wear resistance, sealing integrity and long service under mud, dust and shock load.
Xuzhou Huatong develops and manufactures floating oil seals and high-performance mechanical sealing products for construction, mining, coal mining and other heavy-duty applications. Casting through face lapping stays in one factory, so wear resistance, geometry and sealing faces stay consistent from sample to volume.
Based in Xuzhou — the hub of China's construction machinery industry — we focus on floating oil seal R&D and manufacturing for mining, construction, coal mining and industrial OEMs. Our line is deliberately narrow: DO, DF and XY only, so every ring, O-ring groove and lapped face follows the same process instead of being sourced from a general seal catalog.
Casting, CNC machining, heat treatment and face lapping stay under one roof. That keeps hardness, bore geometry and sealing performance consistent from first sample through volume production — and makes reverse engineering from worn seals practical.
100+ patents and IP achievements covering floating oil seal design, wear-resistant materials, manufacturing processes and production equipment.
Participated in research and drafting of floating oil seal standards and specifications, including the JB/T 8293 series and MT/T 784.
Proprietary alloy casting through precision CNC and lapping in Xuzhou — shorter feedback loops when tolerances or face finish need adjustment.
15Cr3Mo alloy targeting HRC 65–72 for abrasive undercarriage and hub duty — built for mud, grit and long service intervals.
Incoming material, machining dimensions and lapped faces checked batch by batch — records available for OEM audits and repeat orders.
DO, DF and XY — choose by housing geometry, contamination load and duty speed.
O-ring loaded mechanical face seal — two symmetric metal rings with toric elastomer loaders for standard duo-cone housings.
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Diamond-profile elastomer loader for compact axial or square-bore housings — not interchangeable with DO.
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Matched X + Y metal ring group with toric O-ring loaders — complementary halves, not two identical rings.
Learn More →Need spare rubber loaders for DO / DF / XY? View rubber ring accessories →
Floating oil seals help keep mud, dust and water out while reducing lubricant leakage — critical for excavators, bulldozers, mining and other heavy-duty equipment in abrasive, contaminated environments.
Designed for excavators, bulldozers and track systems operating in muddy, dusty and high-impact environments.
Ask about this application →Reliable sealing solutions for mining machinery exposed to abrasive dust, slurry and extreme heavy-load conditions.
Ask about this application →Protecting tractors and harvesting equipment from mud, debris and moisture during long-term field operations.
Ask about this application →Built to withstand high-pressure slurry environments and protect TBM drive systems from contamination.
Ask about this application →Heavy-duty sealing performance for tracked military vehicles operating under extreme terrain conditions.
Ask about this application →Long-life sealing solutions for industrial gearboxes and wind power systems under continuous rotation.
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