Hengshui Minai Rubber & Plastic Technology Co., Ltd. is one of the leading manufacturers and suppliers of rubber packing seal 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 rubber packing seal 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 packing seals is produced by integral molding technology with no splicing gaps, uniform thickness, burr-free smooth surface and high dimensional accuracy. A variety of high-end materials such as EPDM, NBR, silicone, polyurethane and special polymers are optional, which can be accurately matched with materials and processes according to different working conditions such as high and low temperature, high pressure, corrosion resistance, wear resistance, dust prevention, waterproof and explosion-proof. With excellent resilience, the product can closely fit the equipment contact surface under pressure, perfectly fill tiny gaps and achieve zero-leakage sealing effect. Adopting multiple processes such as vulcanization and precision polishing, it is not easy to deform, crack or age, and can withstand long-term complex and harsh working conditions including alternating dry and wet environments, high-frequency vibration, high-pressure impact and chemical corrosion. It is suitable for various precision equipment such as pump valves, hydraulic and pneumatic equipment, intelligent robots, engineering machinery, photovoltaic and semiconductor equipment, and aerospace devices. Featuring easy installation, long-lasting sealing performance and high cost performance, it supports standardized mass production and non-standard special-shaped customization.
Product Parameters
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Parameter Items |
Specifications |
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Core Material |
EPDM, NBR, Food-grade Silicone, Polyurethane, Special Polymer, Nylon |
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Hardness Range |
40A-90A Shore A (Customizable) |
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Working Temperature |
-60℃ ~ 220℃ (Matched by material) |
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Withstand Pressure |
0-50bar Industrial high pressure adaptation |
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Sealing Medium |
Water, engine oil, fuel oil, hydraulic oil, gas, acid-base fluid, dust, humid medium |
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Process Features |
Integral molding, precise tolerance, burr-free, high resilience, anti-aging and anti-deformation |
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Application Industries |
Aerospace, petroleum, chemical, metallurgy, electric power, automobile, shipbuilding, coal mine, electronics, home appliances, bathroom, pump valve, intelligent manufacturing, photovoltaic semiconductor, engineering machinery, etc. |
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Customization Service |
Custom size, special-shaped structure, material, color, hardness and working condition support |
Customization Capability
R&D Strength & Comprehensive Sealing Solution
Hengshu Minai Rubber & Plastic possesses top-level full-dimensional customized R&D and production capabilities in the industry. With more than 35 years of experience in rubber and plastic product R&D and OEM manufacturing, we focus on solving complex sealing problems of standard, non-standard and special-shaped rubber sealing rings for global customers, breaking conventional specification limits to adapt to special equipment and harsh working conditions.
Professional Team & Abundant Mold Resources
We have a professional ODM engineer R&D team and more than 500 sets of self-owned molds, avoiding repeated mold opening and greatly shortening the delivery cycle. We can accurately meet the non-standard customization requirements of high-end fields such as imported equipment, intelligent precision equipment, photovoltaics, semiconductors, aerospace and heavy industry.
Diversified Customization & Flexible Docking
We support multi-format professional drawing analysis, accurately recognizing mainstream files such as CAD, PDF and STEP. Sample copying and personalized parameter customization are also available. We can customize rubber sealing rings with different inner and outer diameters, thicknesses, hardness, colors and special structures to fully meet customers' differentiated design requirements.
Full Material Coverage & Targeted Performance Optimization
We produce full-series sealing products including EPDM, NBR, silicone, polyurethane, polymer materials and nylon. According to special working requirements such as high and low temperature resistance, high pressure resistance, oil resistance, acid and alkali resistance, wear resistance, aging resistance, dustproof and waterproof performance, we independently optimize material formulas and production processes to ensure perfect equipment matching, zero-defect sealing and longer service life.
Full Independent Production & Strict Quality Control
Equipped with complete CNC equipment, integrated molding production lines and precision testing instruments, our factory realizes full independent production and whole-process control including mold development, raw material deployment, compression molding, precise trimming and performance testing. It avoids unstable quality caused by external processing and ensures consistent performance and stable quality of each batch of products.
Flexible Order Scale & Efficient Delivery
We support small-batch sampling, pilot production and mass production to meet customer needs in different stages such as R&D testing, trial production and batch supporting. The sampling cycle is only 3-7 days, and the mass production delivery cycle is 7-25 days. With a monthly production capacity of 15 million pieces, we can quickly respond to various order scales and project delivery deadlines.
Standardized Management & Traceable High-Quality Output
All production processes are strictly in accordance with the ISO9001 quality management system. The qualified rate of customized products remains stable above 99.5%. All products are fully traceable with high batch stability and consistency, reducing equipment failure risks and after-sales concerns for long-term cooperation.
Product Q&A
Q1：What industries and equipment are rubber packing seals suitable for?
A: Our rubber packing seals have a wide range of applications. They are suitable for bathroom home appliances, pump valves, hydraulic and pneumatic equipment, and can meet the harsh working conditions of heavy industries such as aerospace, petroleum, chemical industry, metallurgy, electric power, automobile, shipbuilding and coal mine. They also adapt to high-end precision equipment such as robots, UAVs, shield machines, intelligent manufacturing equipment, semiconductors and photovoltaic equipment, covering civil, industrial and high-end intelligent manufacturing fields.
Q2：Do you support customized non-standard special-shaped seals?
A: Full-range customization services are available. We own 500+ self-owned molds and a professional ODM engineer team. We can customize various non-standard and special-shaped rubber packing seals with special hardness and materials according to customers' CAD, PDF, STEP drawings, samples or size parameters, perfectly meeting the non-standard sealing needs of various special equipment and imported equipment. Both small-batch sampling and mass production are supported.
Q3：What are your OEM/ODM service advantages?
A: We have more than 35 years of OEM processing experience in rubber and plastic sealing products, equipped with a professional ODM R&D engineer team, providing one-stop customized services from drawing design, mold development, sample trial production and mass production to after-sales docking. Relying on fully automatic molding production lines and complete precision testing equipment, combined with ISO9001 standardized quality control, the monthly output can reach 15 million pieces. The sample production takes only 3-7 days and mass production takes 7-25 days. With efficient delivery and stable quality, we have long served 300+ cooperative customers in more than 50 countries worldwide, efficiently adapting to the OEM needs of various brands.
