Product Advantages
① Material Composition & Sealing Mechanism
Oil-resistant O-rings are molded from FKM compounded with reinforcing fillers, curing agents, and accelerators. FKM offers excellent oil resistance, ozone resistance, and aging resistance. Sealing occurs via compression: contact stress exceeds medium pressure to block leakage. Failure occurs when compression set exceeds 25%, swell exceeds 15%, or surface cracks appear.
② Oil Media Resistance
Specifically designed for mineral-based lubricating oils, hydraulic oils (HLP/HVLP), gear oils, compressor oils, and industrial greases. FKM resists strong acids, strong bases, ammonia water, high-temperature steam, and mixed solvents. Compatible with oils containing corrosive additives.
③ Wide Temperature Range
Service temperature: -45°C to 200°C continuous, with intermittent peaks up to 250–300°C. Low-temperature performance down to -45°C, suitable for outdoor hydraulic equipment in cold regions.
④Full Size Range & Customization Available
Cross-section 1.0–7.0mm, OD 10–450mm. Complies with GB/T 3452.1 and AS568. Sample-based customization without drawings – mold development 3–5 days.
Applicable Industries
| Industry | Applications | Conditions | Seal Type |
|---|---|---|---|
| Industrial Hydraulics | Hydraulic cylinder piston seals, valve spool seals, piston pump seals, hydraulic line fittings | 46#/68# anti-wear hydraulic oil, 10~35MPa, -20°C~120°C | Static and reciprocating/rotary dynamic |
| Compressors | Reciprocating compressor piston ring seals, screw compressor shaft seals, valve seals | Compressor oil, gas with oil mist, 80°C~150°C, ≤10MPa | Static and reciprocating dynamic |
| Gearboxes & Reducers | End cover seals, input/output shaft seals, drain plug seals | Gear oil (ISO VG 68/220/460), 60°C~120°C | Static and low-speed rotary |
| Industrial Pumps | Gear pump end covers, vane pump port plates, centrifugal pump bearing isolator seals | Lubricating/hydraulic oil, ambient~100°C, ≤10MPa | Static and rotary |
| Marine & Construction | Marine hydraulic systems, excavator cylinders, crane valve blocks | Hydraulic oil, outdoor (salt spray), -20°C~120°C | Static and dynamic |
| Food/Pharma Equipment (select grades) | Food-grade hydraulic systems, pharma lubrication systems | Food-grade lubricants (NSF H1), -20°C~150°C | Static and dynamic |
Installation & Operation Method
1. Pre-installation Inspection & Cleaning
Clean the gland and mating surfaces with a lint-free cloth soaked in acetone or alcohol to remove chips, oil films, and old seal residue. Inspect gland bottom and walls for scratches, pits, or burrs; repair if found.
2. Lubrication
Apply a thin, uniform layer of system-compatible lubricant (fluorinated grease or the system hydraulic oil) on the O-ring surface to reduce installation friction coefficient to <0.3 and prevent surface damage.
3. Installation Procedure
Use the spiral insertion method or a tapered installation sleeve to gradually push the O-ring into the gland. Never use sharp tools. Ensure the O-ring is not twisted in the gland. Stretch the O-ring OD by no more than 2% of its original circumference to avoid permanent cross-section deformation.
4. Compression Ratio Verification
Measure gland depth and O-ring cross-section height post-installation to calculate actual compression. Static seals: 15%–30% (axial) or 20%–35% (radial); dynamic seals: 10%–20%.
5. High-Pressure Applications
For system pressures >10MPa, install a backup ring (PTFE or PEEK) on the pressure side of the O-ring and strictly control the extrusion gap to prevent O-ring extrusion.
Why Choose Us
1. Direct Manufacturer & Integrated Production
Self-owned factory with Taiwanese vacuum vulcanization presses (200T–300T) and automated cryogenic deflashing machines. Daily capacity: 500,000 pcs. One-stop service from raw materials to molds to finished products – no middleman markup.
2. Extensive Mold Inventory & Fast Sampling
In-house mold shop with extensive standard mold inventory (GB/AS568 full series). Custom mold development: 3–5 days with same-day sampling available. Mold engineers with 20+ years of experience ensuring precision.
3. Full-Process Quality Control
Raw materials sourced from international brands (Dupont™ Viton®) or domestic high-performance compounds – each batch traceable. Automated inspection machines ensure dimensional accuracy (OD tolerance ±0.1mm, C/S tolerance ±0.05mm) – no defective parts shipped.
4. Multiple Material Options
Beyond standard FKM, available in NBR (cost-effective oil resistance, -65°C~150°C), HNBR (high heat/oil resistance, -40°C~150°C), EPDM (brake fluid/hot water, -70°C~170°C), VMQ (medical/food grade), FVMQ (fuel/oil resistance, -60°C~175°C), and FFKM (extreme conditions) – covering different oil media requirements.
5. After-Sales & Engineering Support
Standard parts: 30-day hassle-free return/exchange. Dedicated sales engineers provide 1-on-1 quotation guidance. Technical team assists with gland design, compression ratio calculation, and failure analysis – ensuring correct selection and reliable installation.
