Hengshui Minai Rubber & Plastic Technology Co., Ltd. is one of the leading manufacturers and suppliers of seal ring rubber in China. We are committed to providing high quality customized service and OEM/ODM service to global clients. Please feel free to wholesale bulk durable seal ring rubber made in China here from our factory. If you have any enquiry about pricelist, please feel free to email us.
Products Description
This series of rubber seal rings are integrally molded from high-purity elastic rubber materials through precision high-temperature vulcanization, with regular round ring body, uniform thickness, no splicing gaps, no bubbles or trachoma, and highly consistent overall elasticity. Full-range industrial materials including NBR, EPDM, FKM, Silicone and HNBR are available to adapt to differentiated working conditions such as oil, water vapor, high and low temperature, acid-base corrosion and clean media. Designed strictly according to international general groove standards, it features high cross-section accuracy, stable compression rebound and low permanent compression deformation, avoiding collapse and relaxation under long-term pressure. Perfectly fitting standard sealing grooves, it automatically compensates slight wear and gap changes during equipment operation to maintain long-term tightness. With excellent wear resistance, aging resistance, medium corrosion resistance and cold-heat alternation resistance, the smooth surface ensures jamming-free operation in high-frequency continuous working environments. It boasts easy installation and strong interchangeability, suitable for standardized sealing positions of most industrial electromechanical equipment.
Product Parameters
|
Parameter Item |
Specification |
|
Common Materials |
NBR, EPDM, FKM, VMQ, HNBR |
|
Hardness Range |
Shore A 45°–90° (customizable) |
|
Temperature Range |
-60℃～250℃ (depending on materials) |
|
Applicable Pressure |
Static ≤25MPa / Dynamic ≤15MPa |
|
Permanent Compression Deformation |
≤15% (standard working condition) |
|
Sealing Media |
Hydraulic oil, lubricating oil, water, steam, air, weak acid & alkali, organic solvents |
|
Applicable Conditions |
Static sealing, low-speed reciprocating, slight rotating dynamic sealing |
|
Execution Standard |
GB, AS568, JIS, BS international general standards |
|
Parameter Item |
Specification |
|
Common Materials |
NBR, EPDM, FKM, VMQ, HNBR |
Product Advantages
Precise groove matching for stronger tightness
Developed for standardized sealing grooves with accurate cross-section size, it fits tightly without looseness after installation, fully filling groove gaps and eliminating hidden sealing problems such as micro-leakage and slow pressure relief, meeting high-precision equipment sealing requirements.
Low permanent deformation for long-term stable sealing
Adopting precision vulcanization technology, it delivers excellent compression and rebound performance, resisting collapse, relaxation and elastic attenuation under long-term pressure and alternating cold and hot conditions. It maintains stable sealing tension, greatly extending service life and reducing maintenance frequency.
Full material coverage for wide working condition adaptation
Optional full-series industrial materials are specially adapted to oil resistance, weather resistance, high temperature resistance, corrosion resistance and sterile cleanliness, coping with complex media and extreme temperature changes to cover sealing scenarios of all industrial electromechanical equipment.
Dual dynamic & static use with high fault tolerance
Compatible with both static fixed sealing and low-speed dynamic motion sealing, it adaptively offsets slight equipment wear, assembly tolerances and minor eccentric displacement. It operates smoothly without jamming or shaft abrasion, suitable for complex composite motion conditions.
High universality and easy replacement for cost reduction
Compatible with multiple national standards with strong interchangeability. Sufficient stock for standard specifications enables tool-free quick assembly and disassembly, effectively reducing equipment assembly and later operation & maintenance costs.
Product Applications
- Hydraulic & Pneumatic Equipment: Groove sealing for oil cylinders, air cylinders, solenoid valves and hydraulic valves, stabilizing system pressure, preventing hydraulic and pneumatic pressure leakage and ensuring transmission equipment operation accuracy.
- Valve & Pipeline System: Groove sealing for industrial valves, pipeline joints and flanges, blocking water vapor, oil gas and dust intrusion to eliminate interface leakage, air leakage and pressure relief faults.
- Automotive Electromechanical Parts: Sealing rings for automotive engines, oil pumps, sensors and brake systems, featuring oil & temperature resistance and vibration fatigue resistance for high-frequency vibration working conditions of vehicle equipment.
- Home Appliance & Kitchen-Bath Equipment: Internal sealing for water purification equipment, water heaters and HVAC electrical appliances, waterproof, moisture-proof, non-toxic and clean for civil clean fluid transmission scenarios.
- Precision Instrument Equipment: Cavity sealing for testing instruments, experimental equipment and precision electronic controls, achieving dustproof and airtight effects, stabilizing internal cavity environment and avoiding accuracy interference from external impurities and air pressure fluctuation.
- General Industrial Machinery: Groove sealing for machine tools, pumps, transmission equipment and automation equipment, adapting to conventional dynamic-static composite working conditions for long-term protection and lower failure rate.
Product Q&A
Q: What are the advantages of your rubber seal rings over ordinary ones?
A: Our rubber seal rings are made of 100% new original rubber materials without recycled materials, adopting multi-stage precision vulcanization technology to achieve better resilience, lower compression set and stronger anti-aging performance. Ordinary seal rings on the market usually use recycled rubber, which tends to harden, deform and leak in a short time. Our products feature higher dimensional accuracy, burr-free surface and better concentricity, suitable for dynamic sealing of precision equipment. With full customization support, traceable quality and a pass rate above 99.5%, they perfectly meet harsh working conditions in high-end industry, photovoltaics, semiconductors and heavy engineering.
Q: Do you provide test samples? Is free sampling available?
A: We support sample delivery and testing. Free samples are available for standard specifications, with customers only bearing the freight cost. For non-standard customized products, we complete mold opening and sampling within 3-7 working days. Mass production will start only after sample confirmation, effectively reducing customers' procurement risks and ensuring perfect equipment adaptation.
Q: How to choose the right material for different working conditions?
A: EPDM is preferred for conventional waterproof, bathroom and outdoor anti-aging scenarios; NBR is suitable for oil medium working conditions such as engine oil, hydraulic oil and fuel oil; food-grade silicone applies to drinking water and household appliance contact scenarios; polyurethane is the best choice for high-frequency friction, wear and pressure resistance; special polymer materials fit extreme temperature and anti-corrosion precision scenarios. We provide professional material selection guidance.
