O Ring - High-quality O Ring manufacturer from Taiwan | NIYOK SEALING PARTS CO., LTD.
NIYOK is Taiwan high quality O Ring manufacturer and O Ring supplier With more than 40 years experience, NIYOK is specialized in leading seal and oil seal manufacture. since 1983.
O Ring
Versatile Sealing Ring for Static & Dynamic Applications
The material of the O-ring can be customized according to the pressure and environment of the sealing system. The material conforms to the international standard AS568 & Japanese JIS B2401 classification, and is stronger compared with other competing products, also solving issues of customers repeatedly testing samples and testing quality, and no problems after shipment. Generally, customized drawings are required to inform the wire diameter and inner diameter in order to prepare for the hardness and material of the O-ring. NIYOK's customized O-rings are matched with the unique design and complete testing in the factory, accumulating many successful multinational cases in Taiwan, Japan, and Brazil. Many parts, production equipment and machinery have O-rings as the main sealing purpose, such as automobile parts, motorcycle parts or other industrial rubber products. Including vehicles must be assembled and manufactured with O-rings, and its cross-section is "O", which is the most common, classic, economical, and practical sealing type in dynamic and static applications.
Product Material
For the use of O-ring materials, we provide: NBR, FKM, ACM, SBR, EPDM, including materials with special specifications. And according to customer needs, provide the most suitable material.
Our Advantages
1. The Standard Product Inventory is Wide and Complete: NIYOK stocks the standard products AS568 & JIS B2401 and supplies the most common inch sizes. It can manufacture precise O-rings according to various industrial needs and deliver them quickly and on time. Contains AS568, JIS B2401 P/G/S and other specifications, made of high-quality rubber with good performance.
2. O-Ring Kits: Provide a full range of O-ring Kits for customers needs in the repair market.
3. Low Mold Cost: Most of the various O-ring standard specifications already have molds, and no additional investment is required. If there is a special size that needs to be opened, we will also give back to the customer at low cost, or jointly develop the mold for cooperation.
4. Flexible MOQ and Instant Delivery: It can support small orders from customers, MOQ is smaller than the others, and sample testing is also provided. Instant delivery allows customers to apply production scheduling more flexibly.
5. Fully Automatic Inspection: In 2020, the O Ring automatic quality inspection was introduced to ensure the quality of rubber rings, overcome the bottleneck of manual inspection, and produce more efficient and fast output.
6. Provide Customized Services: If there is a need for customized rubber rings, you are welcome to leave relevant information about CAD/CAM and other requirements, and NIYOK can do advanced planning services and consulting for you.
What is an O-Ring?
An O-Ring is a round, mechanical gasket designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. O-Rings are one of the most common types of seals because they're inexpensive, reliable and have simple mounting requirements. Since they are known as one of the most important elements of machine design, o-rings may be used in static applications, where little range of motion is required. O-Rings may be used in dynamic applications, like rotating pump shafts and hydraulic cylinder positions.
Features
- Maintain extremely small tolerances on cross-section, inner diameter, and outer diameter.
- Can be used for surface smoothness, hardness, elasticity, structure.
- The best economic choice in static applications.
- A variety of materials can be selected.
- Can be used for axial seal and radial seal.
How to Select the Right O-ring Material?
NIYOK offers a range of rubber materials for O-ring applications, including NBR, FKM, SE, EPDM, HNBR, and other specialty-grade materials. Based on your specific requirements, we provide the most suitable material for your application.- 1. Working Media
- Select rubber materials with appropriate resistance based on the media the O-ring will contact — such as oils, water, steam, or chemical agents. Material compatibility with the operating fluid ensures long-term sealing reliability.
- 2. Operating Temperature
- Select materials capable of maintaining elasticity and sealing performance over the long term, based on your actual minimum and maximum operating temperatures. Temperature stability is critical to prevent premature seal failure.
- 3. Static or Dynamic Sealing
- Evaluate material compression, wear resistance, and friction characteristics based on whether the application requires static or dynamic sealing — such as reciprocating or rotary motion. Dynamic applications demand higher durability and lower friction properties.
- 4. Regulatory and Certification Requirements
- For food, drinking water, or medical applications, confirm relevant standards and certifications such as FDA and NSF based on your specific end-use requirements.
- 5. Cost and Service Life Balance
- Balance material performance, service life, and cost to select the material that best meets your actual requirements and budget constraints.
Specification
- Comply with American ASTM568 standard, AS568 series-O-ring size is complete, wire diameter is 1.78mm / 2.62mm / 3.53mm / 5.33mm / 6.99mm.
- Metric series-O-ring size is complete, wire diameter 1mm / 1.5mm / 2mm / 2.5mm / 3mm / 3.5mm / 4mm / 5mm.
- Conform to Japanese JIS standard, JASO series-O-ring size is complete, wire diameter is 1.9mm / 2.4mm / 3.5mm.
O-ring Quotation Request Form
- Application Equipment：[Equipment name/description]
- O-ring Size (ID × CS)：[Dimensions in mm]
- Working Media：[Oil / Water / Steam / Chemical / Other]
- Minimum Operating Temperature(°C)：
- Maximum Operating Temperature(°C)：
- Operating Pressure(MPa / bar)：
- Static or Dynamic：
- Specified Material：
- Specified Hardness：
- Regulatory/Certification Requirements(FDA / NSF / ISO / Other)：
- Quantity per Request：
- Estimated Annual Quantity：
- Product Drawing Available：[Yes / No]
- Sample Required：[Yes / No]
Unsure About O-ring Size, Material, or Hardness?
NIYOK's engineering team is here to help. By providing your application location, working media, operating temperature, pressure, dimensions, and product drawings, we can evaluate the most suitable O-ring materials and sealing specifications based on your actual operating conditions. Submit your O-ring specification requirements now and let NIYOK's engineering team assist with material selection and specification evaluation.We're Here for You — Reach Out Anytime
From early-stage R&D to full-scale production and supply, our team provides end-to-end technical support and solutions.。
- Related Products
-
Custom Slit Valve (Semiconductor Parts)
Semiconductor Parts, Tool & Machine Components A slit valve is typically installed at the entrance...
Details
Robotic Arm Vacuum Suction Cups
Flat suction cups use a standardized single-layer pad design. They are suited to fast pick-and-place...
Details - NEWS
-
NIYOK to Exhibit at Automechanika Istanbul 2026
Automechanika Istanbul stands as the premier automotive aftermarket trade show serving the Middle East, Eastern Europe, North Africa, and Central Asia...
NIYOK will showcase its leadership in customized sealing solutions at the 2025 AMPA (Taipei International Auto Parts & Accessories Show).
With over 40 years of expertise in sealing technology, NIYOK Sealing Parts Co., Ltd. is set to participate once again in the 2025 Taipei International...
- Download
-
O Ring Catalog
Please download the latest O-ring catalog as follows. Our technical sales team has rich experience and technical expertise in O-rings and their applications....
Download
O Ring Kit
Please download the latest O-ring catalog as follows. Our technical sales team has rich experience and technical expertise in O-rings and their applications....
Download
Hot Products
NIYOK O Ring Service Introduction
Located in Taiwan since 1983, NIYOK SEALING PARTS CO., LTD. is a O Ring supplier and manufacturer with more than 40 years of experence in the Seal Industry.
With more than 40 years experience, NIYOK is specialized in leading seal and oil seal manufacture. From oil seals, O-rings, to gaskets, and customized products, application industries include manufacturing, chemical processing, defense, water treatment and filtration, hydraulics, fluid power, heavy trucks, automobiles, aerospace, oil and gas, medical and For life sciences, food and beverages, a complete product line is available for customer needs and specifications.
NIYOK has been offering customers high-quality O Ring production service, both with advanced technology and 40 years of experience, NIYOK ensures each customer's demands are met.