Hengshui Minai Rubber & Plastic Technology Co., Ltd. is one of the leading manufacturers and suppliers of plastic sealing ring 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 plastic sealing ring 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 plastic sealing rings is made of brand-new virgin engineering plastic raw materials without recycled materials or impurity fillers, featuring compact and uniform material structure, moderate toughness and balanced hardness. Integrally formed by precision molds or precisely processed by CNC turning, the products have regular roundness, flat end faces, no burrs, pores or cracks, with strictly controlled dimensional tolerance and high assembly fitting degree. The plastic material has excellent wear resistance, corrosion resistance and anti-aging performance with extremely low water absorption, avoiding deformation, softening and cracking in humid and water environments. It resists erosion of conventional oil, clean water and air media, free of wear powder generation and equipment jamming during long-term operation. Compared with rubber sealing rings, it features permanent shape stability without compression collapse and elastic fatigue after long-term use, realizing multiple functions including dustproof sealing, gap limiting, wear protection and noise reduction. With complete specifications and support for bulk standard spot goods and customized non-standard products, it is suitable for various static and low-speed dynamic sealing scenarios. It delivers much higher cost performance than ordinary rubber gaskets and sealing rings, being the preferred replacement accessory for general mechanical equipment sealing.
Product Parameters
|
Parameter |
Specification |
|
Optional Material |
POM (Polyoxymethylene), PP, PE, PA Nylon, Modified Engineering Plastic |
|
Hardness Range |
70D–85D Shore D |
|
Working Temperature |
-30℃ ~ 100℃ Long-term conventional working temperature |
|
Working Pressure |
0–15bar Low & medium pressure conventional sealing |
|
Water Absorption |
≤0.01% Ultra-low water absorption, no easy deformation |
|
Core Features |
High shape stability, wear resistance, low deformation, anti-aging, waterproof & dustproof, high cost performance |
|
Applicable Medium |
Clean water, air, conventional lubricating oil, hydraulic oil, ordinary humid environment |
|
Processing Technology |
Precision injection molding, CNC finishing, burr-free precision processing, flat polishing |
|
Product Functions |
Leak-proof sealing, gap limiting, wear protection, shock & noise reduction, dust isolation |
Product Advantages
Universal Working Condition Adaptation & High Cost Performance
Plastic sealing rings are suitable for general industrial scenarios with normal temperature, ordinary pressure and conventional media. Featuring low cost, high durability and zero deformation sealing and limiting performance, they effectively solve the problems of easy deformation and relaxation of rubber seals. They are ideal standard sealing parts for light industry, civil equipment and general machinery requiring long-term stable positioning and wear resistance.
Industrial Machinery and Equipment Field
Widely used in automation machinery, pneumatic components, small hydraulic equipment, general transmission devices, bearing protection structures and hardware valve accessories. They are commonly applied for shaft end dust prevention, gap limiting, oil circuit auxiliary sealing and wear protection of moving parts, improving the overall operation stability of mechanical equipment.
Civil, Home Appliance and Water Purification Field
Commonly installed in bathroom sanitary ware, small water purification equipment, home appliance sealing structures, instruments and general mechanical connectors. With excellent waterproof, moisture-proof and anti-deformation performance, they maintain stable sealing effect and long service life in long-term water environment and indoor working conditions.
Stable Positioning Sealing for Special Conventional Scenarios
For working conditions where rubber seals are prone to relaxation and deformation, plastic sealing rings provide rigid and fixed sealing performance. They integrate leakage prevention, gap positioning, wear buffering and dust isolation functions, perfectly adapting to general equipment scenarios that require precise limiting and long-term maintenance-free operation.
Product Q&A
Q: What is the difference between plastic sealing rings and rubber sealing rings?
A: The core differences lie in material hardness, shape stability and applicable working conditions. Plastic sealing rings have rigid structure with no deformation, relaxation or elastic fatigue, focusing on limiting, wear resistance and shape-fixed sealing, suitable for scenarios requiring precise gap positioning and long-term stable dimension. Rubber sealing rings are soft elastomers that fill gaps by resilience, prone to aging, pressure relaxation and long-term deformation. Rubber rings are suitable for normal-temperature, low-pressure scenarios requiring elastic buffering, while plastic sealing rings are preferred for working conditions requiring wear resistance, shape stability, dust limiting and long-term maintenance-free operation.
Q: Are plastic sealing rings waterproof and moisture-proof?
A: They have excellent waterproof and moisture-proof performance. The plastic material has extremely low water absorption with almost no moisture absorption. It will not swell, soften, deform or mildew after long-term use in humid and water environments, maintaining stable sealing structure without loose sealing or leakage failure caused by moisture, which is very suitable for moisture-proof sealing scenarios such as bathroom, water purification equipment and ordinary outdoor environments.
Q: Can plastic sealing rings be used at high temperatures?
A: Suitable for standard temperature operating conditions, with a standard working range of -30°C to 100°C. It performs stably without degradation in applications involving ambient temperatures, warm water, or heat generated by standard equipment (up to 100°C). It is not recommended for use with high-temperature steam, hot oil, or continuous exposure to temperatures exceeding 100°C, as this can lead to material softening, loss of shape retention, and accelerated wear; for high-temperature applications, specialized seals made of materials such as graphite or PTFE are recommended.
