O-Rings & Sealing Products
EPDM Oring Seal Washer
• No.: EPDM Oring • Standard: GB1235 /JIS B2401 • Color: Black / Customized Color • Hardness: 50-90 Shore A (Customized Available) • Media: Excellent to Hot Water and Steam • Temperature Range: -55℃ to +150℃ • MOQ: 1 PCS
Features
- Long service life
- Excellent Water and Steam Resistance
- Outstanding Weather and Ozone Resistance
- Wide Temperature Range
- Excellent Chemical Resistance
Applications
About This Product
Product Overview
EPDM O Ring Seal is manufactured from high-quality Ethylene Propylene Diene Monomer (EPDM) rubber, offering excellent resistance to water, steam, ozone, weathering, aging, and many chemical environments. It is widely used in industrial sealing applications where long-term durability, stable sealing performance, and environmental resistance are required. With excellent low-temperature flexibility and outstanding compression set resistance, EPDM O-rings provide reliable sealing solutions for water systems, steam equipment, HVAC systems, automotive cooling systems, chemical equipment, and outdoor applications.
Key Advantages
Why Choose JUNIQ EPDM O Ring
Excellent Water and Steam Resistance
EPDM rubber provides superior resistance to hot water, steam, and moisture, making it an ideal sealing material for plumbing systems, boilers, pumps, valves, and water treatment equipment.
Outstanding Weather and Ozone Resistance
EPDM O-rings have excellent resistance against ozone exposure, UV radiation, outdoor aging, and atmospheric conditions. They are suitable for long-term outdoor applications with extended service life.
Wide Temperature Range
Continuous working temperature: -55°C to +150°C (-67°F to +302°F). Maintains flexibility and sealing performance in extreme temperature environments.
Excellent Chemical Resistance
EPDM rubber performs well against acids, alkalis, water-based chemicals, alcohols, and steam. Suitable for many industrial chemical sealing applications.
Low Compression Set Performance
EPDM O-rings maintain their original shape after long-term compression, ensuring reliable sealing and reducing leakage risks.
Technical Data
Technical Specifications
| Product Name | EPDM Rubber O Ring Seal |
| Material | Ethylene Propylene Diene Monomer (EPDM) |
| Rubber Type | Synthetic Rubber |
| Color | Black / Customized Colors Available |
| Hardness | 40-90 Shore A |
| Temperature Range | -55°C to +150°C (-67°F to +302°F) |
| Tensile Strength | Excellent |
| Elongation | Up to 100%-500% (Compound Dependent) |
| Compression Set Resistance | Excellent |
| Weather Resistance | Excellent |
| Ozone Resistance | Excellent |
| Water Resistance | Excellent |
| Steam Resistance | Excellent |
| Oil Resistance | Poor |
| Fuel Resistance | Poor |
| Electrical Insulation | Good |
Selection Guide
How to Select the Right O Ring
(1) Material Selection
Choosing the correct O-ring depends on your working conditions.
| Working Condition | Recommended Material |
|---|---|
| Hydraulic Oil / Lubricant | NBR |
| Fuel / High Temperature | FKM |
| Water / Weather Exposure | EPDM |
| Food / Medical Applications | Silicone |
| Chemical Environment | PTFE / FKM |
Material Property Comparison
| Property | NBR (N) | Silicone (S) | FKM | EPDM (E) | Neoprene (C) | PTFE (T) | PU | ACM (A) |
|---|---|---|---|---|---|---|---|---|
| Ozone Resistance | × | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ |
| Weather Resistance | △ | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ |
| Heat Resistance | 120ºC | 250ºC | 200ºC | 150ºC | 120ºC | 280ºC | 90ºC | 150ºC |
| Chemical Resistance | ○△ | ○○ | ○○ | ○○ | ○△ | ○○ | ○○ | × |
| Oil Resistance | ○○ | ○△ | ○○ | × | ○△ | ○○ | ○○ | ○○ |
| Water Tightness | ○ | ○ | ○ | ○ | ○ | ○○ | ○ | ○ |
| Cold Resistance | -40ºC | -55ºC | -20ºC | -55ºC | -55ºC | -100ºC | -60ºC | -20ºC |
| Abrasion Resistance | ○ | × | ○ | ○○ | ○ | ○○ | ○○ | ○ |
| Deformation Resistance | ○○ | ○○ | ○ | ○○ | △ | × | × | △ |
| Mechanical Properties | ○○ | × | ○○ | ○○ | △ | ○○ | ○○ | △ |
| Acid Resistance | △ | ○△ | ○○ | ○ | ○△ | ○○ | ○○ | × |
| Tensile Strength | ○○ | × | ○ | ○○ | ○ | △ | ○○ | △ |
| Electrical Properties | △ | ○ | △ | ○ | △ | ○○ | △ | △ |
| Water/Steam Resistance | ○△ | ○△ | ○△ | ○○ | △ | ○ | ○ | × |
| Flame Resistance | × | △ | ○○ | × | ○ | ○○ | ○○ | × |
| Shelf Life | 5-10Y | ~20Y | ~20Y | 5-10Y | 5-10Y | ~20Y | ~20Y | ~20Y |
Legend: ○○ Excellent ○ Good △ Fair × Poor
(2) Working Temperature
Normal industrial temperature:
NBR: -40°C ~ +120°C
EPDM: -55°C ~ +150°C
For higher temperature requirements, please contact us for alternative materials.
(3) Hardness Selection
| Application Condition | Shore A | IRHD | Recommended Application |
|---|---|---|---|
| Low Pressure / High Sealing Requirement | 40 ±5 / 50 ±5 | - | Soft O-rings for low pressure applications requiring high sealing performance |
| General Sealing Applications | 60 ±5 | 63 ±5 | Standard static and dynamic sealing applications |
| General Industrial Sealing | 70 ±5 | 73 ±5 | Most common O-ring hardness for industrial applications |
| High Pressure Applications | 80 ±5 | 83 ±5 | High pressure hydraulic and pneumatic sealing |
| Heavy Duty / High Pressure | 90 ±5 | 92 ±5 | High pressure, extrusion resistance and demanding conditions |
(4) Application Type
Static Sealing
- • Flanges
- • Valves
- • Pipe connections
Dynamic Sealing
- • Hydraulic cylinders
- • Pneumatic cylinders
- • Moving components
It is critical to determine whether your application involves dynamic or static sealing.
Where It's Used
Product Applications
| Application Field | Typical Applications |
|---|---|
| Water and Steam Systems | Water pumps, Valves, Pipe connections, Boiler systems, Steam equipment, Water treatment systems |
| HVAC Systems | Air conditioning equipment, Heating systems, Refrigeration equipment, Ventilation systems |
| Automotive Applications | Cooling system seals, Radiator seals, Brake system components, Automotive water circuit sealing |
| Industrial Equipment | Hydraulic systems using water-based fluids, Chemical processing equipment, Industrial machinery, Pumps and compressors |
| Construction Applications | Door and window sealing, Outdoor equipment, Building waterproof systems |
User Guide
Installation & Maintenance Guide
Installation Instructions
Check the O-Ring
Before installation, check the EPDM O Ring for surface defects, cracks, deformation, or contamination. Ensure the size and material are suitable for the application.
Clean the Sealing Area
Clean the groove, sealing surface, and surrounding components to remove dust, oil, metal particles, and other contaminants.
Apply Lubrication
Apply a suitable lubricant compatible with EPDM rubber to reduce friction and prevent damage during installation. Avoid petroleum-based lubricants.
Install Carefully
Place the O-Ring into the groove evenly. Avoid twisting, stretching excessively, or cutting the sealing ring during installation.
Check Assembly
Ensure the O-Ring is properly positioned and not pinched or displaced before system operation.
Perform Testing
After installation, conduct pressure testing or leakage inspection to confirm sealing performance.
Maintenance Recommendations
Regular Inspection
Periodically check the O-Ring for wear, aging, cracks, hardening, or deformation.
Keep Clean
Prevent dust, particles, and chemical contamination from damaging the sealing surface.
Avoid Improper Media
Do not expose EPDM O-Rings to petroleum oils, mineral oils, fuels, or hydrocarbon solvents.
Monitor Working Conditions
Ensure operating temperature, pressure, and chemical environment are within the recommended range.
Replace When Necessary
Replace the O-Ring if leakage, permanent deformation, surface damage, or loss of elasticity occurs.
Proper Storage
Store in a cool, dry place away from direct sunlight, ozone sources, heat, and chemicals.
Logistics
Packaging & Delivery
Packaging & Shipping
Delivery & Transportation
| Shipping Method | Express / Air Freight / Sea Freight |
| Trade Terms | EXW / FOB / CIF |
| Loading Port | Shanghai Port / Other ports according to customer requirements |
| Delivery Time | According to order quantity and production schedule |
| Order Support | Sample orders, trial orders and bulk orders accepted |
| Payment Methods | T/T, L/C, PayPal, Western Union |
Payment & Order Support
Wuxi Juniq Precision Industrial Co., Ltd. supports multiple payment methods, including T/T, L/C, PayPal, and Western Union. We offer flexible trade terms such as EXW, FOB, and CIF. We support sample orders for quality evaluation, flexible MOQ for different purchasing needs, and OEM orders with customized specifications, packaging, and labeling.
FAQ
Frequently Asked Questions
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