RUBBER SEALS

Products Categories

Superconductive electromagnetic shielding sealing strip

O-Ring Seals | Supplier of Industrial Seals in Multiple Materials & Sizes

High-Energy Absorption Tugboat Rubber Fender for Superior Marine Protection

High-Temperature Resistant EPDM Rubber Steam Hose

Durable Cooling Tubes for High-Performance Semiconductor Equipment

High-Pressure Oil Pipes with Enhanced Pulse Resistance

O-Ring Seals | Supplier of Industrial Seals in Multiple Materials & Sizes

An O-ring is an elastomeric loop with a circular cross-section, representing one of the most common sealing elements in the world. Its simple design, low cost, reliable performance, and wide range of applications make it the preferred sealing solution across numerous industries.

MOQ:1,000,000 Contact us Download

product details

Product Specifications

Product Features

Versatile Material Options – Available in NBR, FKM, EPDM, Silicone, etc.
Standard & Custom Sizes – AS568, ISO 3601, or custom dimensions
High Temperature Resistance – Up to 300°C (special materials)
Chemical Resistance – Resists oils, acids, and solvents (material-dependent)
Pressure Tolerance – Withstands up to 5,000 psi (depends on hardness)
Low Compression Set – Maintains seal integrity over time
Cost-Effective – Simple design, easy to install and replace
FDA & USP Compliant – Food & medical-grade options available

Manufacturing Process

• Compression molding

(Compression molding=CM-Process)

• Injection molding

(Injection molding=IM-Process)

When the CM process is adopted for processing, the raw materials are manually added to the middle of the mold before the upper and lower molds are combined. As this process is very time-consuming, this process is suitable for the manufacturing of small batches and large sizes.

The raw materials are automatically injected into the multi-chamber mold by using the IM process. This process is particularly suitable for the production of large quantities and small sizes.

Application

Hydraulic & Pneumatic Systems – Pumps, cylinders, valves
Automotive – Fuel systems, engines, transmissions
Plumbing & Water Systems – Faucets, pipe joints
Medical Devices – Syringes, implants, diagnostic equipment
Aerospace – Fuel & hydraulic seals
Food Processing – Sanitary equipment sealing
Oil & Gas – High-pressure drilling components

Advantages

Excellent Sealing Performance – Low leakage risk
Wide Temperature Range – From -60°C to +300°C (material-dependent)
Long Service Life – Resists wear, aging, and deformation
Easy Installation – Simple groove design for quick replacement
Cost-Efficient – Low production cost, high reliability
Customizable – Special materials/sizes for unique applications

R&D Centre - Laboratory

Sealing Mechanism

The O-ring is an automatic bidirectional sealing element. During installation, the pre-compression in both the radial and axial directions endows the O-ring with its own initial sealing capacity. It increases as the system pressure rises.

	Static Seal	Dynamic seal
Working Pressure	l When there is no retaining ring, the maximum pressure can reach 2MPa l When there is a retaining ring, the maximum pressure can reach 40MPa. l When a special retaining ring is used, the maximum pressure can reach 200MPa	l When there is no retaining ring, the maximum pressure can reach 5MPa l When there is a retaining ring, the pressure is relatively high.
Speed during movement	The maximum reciprocating speed can reach 0.5m/S, The maximum rotational speed can reach 2.0m/S. General occasions: -30°C to 100°C; Temei Rubber: -60°C to 250°C; Rotating conditions: -30°C to 80°C.

010203040506070809101112131415

FAQ

1. O-rings used on outdoor equipment or exposed to sunlight and ozone for long periods often harden and crack. Are there specially weather-resistant materials or preventive measures?

You are describing typical O-ring UV degradation and ozone attack. For weatherproof sealing solutions for outdoor machinery, we strongly recommend:
●Primary Material Choice: Use Ethylene Propylene Diene Monomer (EPDM) O-rings, which have inherent excellent resistance to ozone, UV, and weather, making them the first choice for automotive cooling system seals and outdoor electrical enclosure sealing.
● Enhanced Materials: If oil resistance is also needed, consider weather-resistant enhanced Chloroprene (CR) O-rings.
●Auxiliary Protection: For situations where material change isn't possible, periodic application of specialized UV-resistant O-ring grease can slow degradation. We can provide weathering test reports and selection recommendations for your specific environment.
2. We have purchased many O-rings of different specifications. Over time, identifying the material becomes difficult, posing a high risk of mixing. How can we prevent this at both the source and on-site?

Material mix-up is a major cause of seal failure. We offer systematic solutions:
●Source Identification: We can provide permanently color-coded or laser-marked O-rings, where each material (e.g., NBR, FKM, EPDM) has a unique color/mark.
●Packaging Control: Use anti-mixing individual sealed bags, each clearly labeled with material grade, size, lot number, and certifications like FDA silicone O-rings.
●On-Site Support: Provide O-ring material rapid identification kits and on-site seal inventory management system solutions to help achieve traceability management for automotive fuel system seals.
3. In extreme high-vacuum or rapid pressure cycling (pressure shock) conditions, standard O-rings can suffer from gas permeation or explosive decompression (ED) damage. What are the special requirements?

These extreme dynamic conditions place very high demands on seals. Standard O-rings are prone to failure here.
●High Vacuum Applications: Choose materials with low volatility and low outgassing rates (e.g., specially treated FKM or FFKM) and pay attention to O-ring surface finish and vacuum degassing processes.
●Rapid Pressure Cycling: The key is the material's Resistance to Explosive Decompression (ED). We recommend ED-resistant specialized HNBR or FKM compounds that resist permanent damage caused by rapid gas expansion within the seal during fast pressure drops.
●Professional Validation: For deep-sea equipment high-pressure sealing or ultra-high pressure valve pulse test seals, we can provide proven materials and designs, along with relevant test data.