Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
Custom Non-Standard FKM Rubber Gasket for Hydraulic Machinery
- Category: Rubber Sealing Gasket / FKM Industrial Gasket
- Temperature range: -20℃ ~ 200℃, short time up to 250℃
- Hardness: 70–90 Shore A
- Working pressure: ≤16 MPa
- Color: Mainly black, also brown / green for different media resistance
- Description: High performance FKM/Viton fluorine rubber gasket with excellent high temperature, oil and chemical corrosion resistance. Good aging resistance, low compression set and long service life. Available in flat round, square and custom special shapes, widely used for flange, valve, pump, hydraulic system, automotive and petrochemical equipment sealing.
5.0
design customization
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1.Key Performance Advantages
- Excellent oil resistance: Almost no swelling in gasoline, diesel, engine oil and hydraulic oil, much better than NBR.
- Strong chemical resistance: Resist concentrated acid, alkali, oxidants and most organic solvents; not suitable for small molecular ketone, ether and ester.
- Heat & aging resistance: Stable performance at 200℃ for long-term use; good ozone and weather resistance.
- Low compression set: Good resilience under high temperature and high pressure, long sealing life.
- Self-extinguishing: Fire retardant, suitable for fire-proof required occasions.
2.Common Types
- Flat gasket: For flange sealing, round / square shape, thickness 1–5mm
- Special-shaped gasket: Custom die-cut / molded for valve cover, pump body sealing
- Clad gasket: Fluorine rubber coated with rubber / metal, high strength and corrosion resistance
- Combined gasket: FKM with frame / spring structure, for high-pressure dynamic sealing
3.Application Fields
- Petrochemical: Pipe flange, valve, pump, reactor sealing (acid & solvent resistant)
- Automotive: Engine oil seal, fuel pump seal, exhaust gasket (high temp & oil resistant)
- Hydraulic & Construction Machinery: Cylinder, motor, high-pressure valve sealing
- High-temperature equipment: Oven, boiler, heat exchanger
4.Selection Guide
- Medium match: Standard FKM for oil & acid; 3-ply FKM for water & steam; high-fluorine FKM for strong corrosion.
- Temperature: Standard FKM for below 200℃; special formula for over 250℃.
- Hardness: 70–80 Shore A for static sealing; 85–90 Shore A for high pressure / dynamic sealing.
- Standard size: Available from DN15 to DN400 flange standard.
5. Material Comparison
|
Material |
Temperature |
Oil Resistance |
Acid & Alkali Resistance |
Price |
|
FKM / Viton |
-20～200℃ |
★★★★★ |
★★★★☆ |
High |
|
NBR |
-20～110℃ |
★★★★☆ |
★★☆☆☆ |
Medium |
|
VMQ (Silicone) |
-60～230℃ |
★★☆☆☆ |
★★★☆☆ |
Medium-High |
|
EPDM |
-40～150℃ |
★★☆☆☆ |
★★★★★ |
Medium |
6.Company Selling Points
- Standard stock: Thickness 1/2/3/4/5mm, diameter 10–500mm, black 70 Shore A in stock.
- Custom service: Special shape, hardness 60–90A, color, adhesive backing, composite structure.
- Grade option: Cost-effective domestic grade & imported Viton / DAI-EL premium grade.
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