Bypass multi-tier distributor markups. We deliver NOK & Parker benchmarked rotary skeleton oil seals (TC/TB/TG4/Cassette), hydraulic rod & piston packings (U-Cup, Stepseal, Glyd Ring, KDAS), DKB metal wipers, and 500-piece O-ring kits with full dimensional and Shore A durometer inspection.
Premium NBR (70°/90° Shore A), FKM/Viton (-20°C~220°C), High-elastic Polyurethane (PU 93A), and Bronze-filled PTFE.
Instant crossover lookup against NOK, CFW, Simrit, Parker, Hallite, SKF, and National part numbers.
Order sample boxes or batch repair kits for machine rebuilds without committing to 10,000-piece factory minimums.
Manufactured in precision molds with cryogenic deflashing for burr-free sealing lips and consistent spring retention.
Double-lip & single-lip spring-loaded shaft seals for gearboxes, crankshafts, wheel hubs, and hydraulic pumps.
Reciprocating high-pressure seals engineered to withstand up to 60 MPa pressure spikes and continuous duty cycles.
Heavy-duty dust scrapers and low-friction wear rings that prevent cylinder scratching, metal-on-metal friction, and scoring.
Precision molded metric & imperial O-rings with custom hardness grades (50~90 Shore A) and heavy-duty shop repair boxes.
Alloy cast iron face seals with mirror-lapped surfaces for tracked vehicle undercarriage, final drives, and tunneling rigs.
Custom engineered rubber and polyurethane molded components built to 2D/3D technical drawings or physical reverse engineering.
Match the exact elastomer formula to your operating medium, pressure threshold, and temperature limits.
| Material | Hardness | Working Temp | Max Pressure | Primary Applications & Media |
|---|---|---|---|---|
| NBR (Nitrile Butadiene) | 70° / 90° Shore A | -40°C ~ +120°C | ≤ 0.5 MPa (TC) / 30 MPa (Packings) | Standard mineral hydraulic oils, grease, air, water. Most economical choice for standard machinery. |
| FKM / Viton (Fluoroelastomer) | 75° / 85° Shore A | -20°C ~ +220°C | ≤ 1.0 MPa (TC) / 35 MPa | High temperature engines, synthetic oils, transmission fluids, acidic chemicals, harsh environments. |
| PU (Polyurethane - High Elastic) | 92° ~ 95° Shore A | -35°C ~ +100°C | ≤ 40 MPa | Excavator hydraulic cylinders, U-Cups, UN/IDI/ODU seals, high wear resistance & tear strength. |
| PTFE (Bronze / Carbon Filled) | 55° ~ 65° Shore D | -60°C ~ +260°C | ≤ 60 MPa | Stepseals, Glyd Rings, wear strips. Ultra-low friction, zero stick-slip, extreme pressure resistance. |
| Silicone / VMQ | 60° Shore A | -60°C ~ +200°C | Static sealing | Food-grade sanitary equipment, extreme low/high temperature static O-rings, electrical enclosures. |
We act as your independent QC inspectors on the factory floor in Hebei and Guangdong.
Shore A / Shore D hardness gauge verification against batch tolerance limits (±3° Shore A).
Shadowgraph profile projector inspection for sealing lip radius, spring groove angle, and flash residue.
Inside diameter (ID), outside diameter (OD), and height (H) 100% digital caliper validation (±0.03mm).
72-hour heated ASTM #1 & #3 oil immersion test to verify volumetric swell and tensile retention.
High-resolution unboxing video, label barcoding, and master carton drop test confirmation before shipping.
Enter your part numbers, dimensions (ID × OD × H), or attach your BOM list. We reply within 2-4 hours.