Aok Valve Stem Seals vs. NIYOK SEALING PARTS
Websites
- Aok Valve Stem Seals Ltd.: https://www.aok-oilseal.com
- NIYOK SEALING PARTS CO., LTD.: https://www.niyok.com.tw
Basic Information
Aok Valve Stem Seals Ltd.
- Founded in 1995, Nantou City, Nantou County, Taiwan.
- Specializes in automotive rubber oil seals, valve stem seals, bonded seals, O-rings, bushings, absorbers, and custom rubber-metal parts.
- Provides OEM/ODM services with a strong focus on product quality and R&D.
- Serves global automotive and industrial markets.
- Source
NIYOK SEALING PARTS CO., LTD.
- Over 40 years of experience; based in Lukang Township, Changhua, Taiwan.
- Manufactures seals and oil seal products using advanced 3D CAD and modern facilities.
- Designs and produces high-quality rubber/sealing components for automotive and industrial sectors worldwide.
- Source
Awards
Both companies do not publicly list specific awards.
Certifications
| Company | Certifications |
|---|---|
| Aok Valve Stem Seals | IATF 16949:2016, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 (source) |
| NIYOK SEALING PARTS | ISO TS-16949 (source) |
Key Features
Aok Valve Stem Seals Ltd.
- Focus on valve stem seals, bonded seals (sealing washers), large size O-rings/oil seals, bushings, precision custom rubber molded parts.
- OEM/ODM services for standard/custom sealing solutions—especially for automotive sector.
- High-quality materials; superior sealing capability; high temperature resistance; excellent durability.
- Advanced inspection procedures and modern manufacturing equipment.
- Supports a wide range of global automotive brands with customized solutions.
- [Sources](https://www.aok-oilseal.com/, https://aokoilseal.imb2b.com/introduce/)
NIYOK SEALING PARTS CO., LTD.
- Strict quality control aligned with ISO/IATF standards; global supply capability.
- Advanced customization via R&D team—material selection (FKM, HNBR, NBR, SI), exclusive product designs for harsh environments.
- Precision mold design/manufacturing; dimensional stability for complex requirements.
- Leadership in electric vehicle (EV) sealing technology (motor shaft/dust protection seals).
- Fast/flexible production for both small-volume custom projects & large-scale OEMs.
- Broad applications: auto/motorcycle/truck/EV/aerospace/railway/oil & gas/semiconductor/hydraulics/etc.
- Source
Featured Products
Aok Valve Stem Seals Ltd.
- Valve Stem Seals – For engine lubrication control/oil leak minimization. (details)
- Bonded Seals – High-pressure sealing between metal surfaces. (details)
- Rubber-Metal Parts – Custom O-rings/gaskets/specialized sealing components. (details)
- Full product list: AOK Products
NIYOK SEALING PARTS CO., LTD.
- Shock Absorber Seal & Cover
- Valve Stem Seal (low-friction)
- Power Steering Oil Seal
- Brake Caliper Seal (piston/dust boot types)
- Transmission Seal
- O Ring / X Ring / V Ring
- Gasket / Shake-proof Gasket / Automobile Gaskets
- Special Synthetic Rubber Gasket
- Full product list: NIYOK Products
Marketing Focus
Aok Valve Stem Seals Ltd.
- Specialized in precision/high-quality sealing products for the automotive industry.
- Emphasizes OEM/ODM services with advanced manufacturing and quality assurance processes.
- Targets automotive manufacturers, engine builders, maintenance providers globally (Europe/Asia/Mainland China).
- Also serves clients needing custom-engineered rubber-metal components/seals.
- [Sources](https://smp.aok-oilseal.com/en/about/, https://market-prospects.com/articles/aok)
NIYOK SEALING PARTS CO., LTD.
- Focuses on high-quality oil seals/rubber parts for diverse industries—automotive to electronics/home appliances/water supply/etc.
- Highlights strict quality control (ISO/IATF), advanced tech/customization services, over 40 years’ expertise.
- Serves OEMs/Tier 1 suppliers seeking reliable custom-made solutions/new product development/replacement parts.
- Source
Technical Strength
Aok Valve Stem Seals Ltd.
- In-house mold development/manufacturing enables wide customization scope.
- Strong R&D team focused on innovation/performance/durability improvements; advanced manufacturing processes/materials.
- Certified by major international standards; active at industry events (e.g., Taipei AMPA).
- Source
NIYOK SEALING PARTS CO., LTD.
- Experienced engineering team uses latest 3D CAD tools for design/development of standard/custom solutions.
- Robust quality systems (ISO/IATF); supplies both standardized and customer-specific products to Tier 1 auto manufacturers in Taiwan/global markets.
- Offers consultation/design support directly to clients for advanced needs/applications (including EV).
- Sources
Environment / Society / Governance
Aok Valve Stem Seals Ltd.
- Formal EHS policy since 2015 covering environmental protection law compliance and workplace safety regulations.
- Energy-saving/reduction of waste initiatives to minimize pollution
- EHS training for employees; risk evaluation/improvement of manufacturing processes
- Goals: zero-pollution/accident/harm
- Continuous improvement in EHS management
- Source
NIYOK SEALING PARTS CO., LTD.
- No public details found regarding ESG or formal environmental/social/governance initiatives.
OEM / ODM / White Label Support
| Company | OEM Support | ODM Support | White Label Support |
|---|---|---|---|
| Aok Valve Stem Seals | Yes | Yes | Not mentioned |
| NIYOK SEALING PARTS | Yes | Yes | Not mentioned |
Both companies emphasize strong OEM/ODM capabilities but do not mention white label services explicitly.
[Sources: AOK - https://www.aok-oilseal.com/, NIYOK - https://www.niyok.com.tw/en/page/Our-Advantages.html]
Pricing
No public pricing information available from either company.
Testimonials
No customer testimonials are published on either company’s website or referenced sources.
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