EN549 Compliant UL94-V2 70 Shore A NBR O Ring Nitrile Rubber O Ring for Gas Valves and Appliances

ORK EN549 compliant rubber O-ring seals are engineered for gas valves and appliances, delivering reliable sealing performance across a wide range of industrial, automotive, and plumbing applications. Manufactured from durable, pliable rubber compounds, these O-rings maintain a secure seal at contact and connection points even under long and arduous use.

• Binoculars, tools, automobiles, garage equipment, plumbing, machinery, plant maintenance, and air and gas connections.
• Professional pipe sealing, sewer leak repair, bathtubs, septic tanks, hydraulic systems, and air and gas connections.
• Oil, coolant, power steering fluid, and washer fluid sealing in mechanical and grease applications.
• Widely used by professional mechanics and DIY car owners to fix engine leaks and other fluid leaks including oil, coolant, power steering fluid, and washer fluid.

• Versatile sealing forms: Suitable for both static and dynamic seals.
• Standardized compatibility: Available in a variety of materials, sizes, and groove configurations that are standardized and interchangeable.
• Multi-motion capability: Suitable for rotary motion, axial reciprocating motion, or combined motion (such as rotary reciprocating combined motion).
• Broad media compatibility: Effective sealing of oil, water, gas, chemical media, and other mixed media through selection of suitable rubber materials and appropriate formulation design.
• Wide temperature range: Operates from -60 °C to +220 °C. Pressure can reach up to 1500 Kg/cm² in fixed applications when combined with a reinforcing ring.
• Simple design: Compact structure with a self-sealing effect for reliable sealing performance. Easy to assemble and disassemble.
• Easy installation and replacement: The O-ring itself and the mounting structure are extremely simple and standardized.
• Wide material selection: Available in nitrile rubber (NBR), fluororubber (FKM), silicone rubber (VMQ), ethylene propylene rubber (EPDM), neoprene (CR), butyl rubber (BU), polytetrafluoroethylene (PTFE), natural rubber (NR), and more.
• Low cost with relatively small dynamic friction resistance.

FKM is a copolymer made of highly fluorinated hydrocarbons, developed during the 1950s. FKM seals display very good resistance to media, ozone, and aging. The material is also stable in fuels as well as petroleum-based oils and greases, along with aliphatic and aromatic hydrocarbons.

It is unstable with regard to polar solvents (e.g., MEK and ethyl acetate), low molecular weight organic acids (formic and acetic acid), glycol-based brake fluid, ammonia gas, amines, alkalis, and superheated steam. There are copolymers, terpolymers, and tetrapolymers with fluorine content varying between 65 and 71 percent. In this way, FKM can be precisely designed for specific requirements in terms of media resistance and cold flexibility. This is a benefit that reliably protects applications in the chemical and pharmaceutical industries that have aggressive media and process temperatures above 140 °C, which materials such as EPDM or HNBR cannot handle.

As a peroxide-crosslinked material, the newly developed 75 FKM 239961 from Freudenberg Sealing Technologies meets the latest regulatory requirements for materials in the food, beverage, and pharmaceutical industries with direct product contact. Its very high purity, media and temperature resistance are also quite impressive, enabling it to be used as a static or dynamic seal in a wide range of applications. O-rings and diaphragms can now be manufactured from this material. In fact, customer-specific molded parts will also be possible in the future. Due to its clean structure, the material also fulfills all necessary certifications in the long term, such as EU (Reg.) 1935/2004, FDA § 177.2600, USP Chapter 87 (in vitro), USP Class VI Chapter 88 (currently in process), ADI free, BfR XXI (Cat. 4), and 3-A® Sanitary Standards.

We can supply material as NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, ACM, SBR, FLS (FVMQ), etc.

Different elastomers have different compatibility with various chemical elements and their characteristics. See the table below for more material knowledge to order the most cost-effective O-rings from us.

We hold the following certificates: ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, IATF, FDA, REACH, ROHS, SGS, etc.

• ISO 9001:2015
• IATF 16949:2016
• ISO 45001
• ISO 14001

For colored O-rings, we can manufacture to customer requirements. If you need colored O-rings, please provide a Pantone number.

Rui Chen Sealing Co., Ltd. was established in 2006 and now has more than 200 staff members. The company has two branches in Guangdong and Jiangxi: Dongguan Rui Chen Sealing Co., Ltd. and Shangrao Rui Chen Sealing Co., Ltd.

In recent years, the company has been supported by the Shangrao municipal government and fully enjoys all the preferential policies for the economic development zone. We always take "best quality, best service" as our mission and make progress together with you in harmony and mutual win.

Ruichen always meets our customers' requirements. To ensure we produce high-quality O-rings, our company implements the following general standards:

1. Raw material incoming inspection standard: ASTM D2000 & HG/T 2579-2008 & HG/T 2811-1996
2. Public O-ring dimensional tolerance: GB/T 3452.1-2005
3. N-level specification for O-ring appearance quality inspection: GB/T 3452.2-2007
4. Hardness measurement model: Micro O-Ring Testing (Type M system)
5. Hardness using standard: ASTM D2240 Rubber Standard Test Method (Shore A)
6. Sampling inspection specification: GB/T 2828.1-20

• Material Inspection: Storage of all raw materials before testing, and issuance of a report on the corresponding material properties. Compared with the raw material's own property report, the two reports' property values must be consistent before the material can be put into storage.
• Model Inspection: After mold development or mold cleaning is completed on the machine, we test all specifications of the mold to ensure that each cavity meets product specifications and quality requirements.
• Production Inspection: During the production process, inspection personnel conduct timed semi-finished product inspections to ensure the rationality of the technology and control the defective rate within a reasonable range.
• Quality Control: The quality inspection department conducts a sampling inspection of each batch of products.
• Production Full Inspection: The optical inspection machine ensures the appearance and dimensions of the product are 100% qualified.

Ruichen has cooperated with many superior customers. We have a complete system and excellent productivity to serve you.

Many big companies select Ruichen for their rubber seals and customized rubber parts because we always satisfy them in quality, price, delivery, and service. At the same time, we also attach great importance to small customers in niche markets. Whether your purchase quantity is big or small, you are our valuable partner.

• High Quality: We continue to manufacture high-quality products for all customers and pursue 100% customer satisfaction, which has become one of our core competencies.
• Profession: We have rich experience in materials, products, and production, along with excellent international trade and language communication skills.
• Best Services: From quoting, sampling, production, and shipping to after-sales, our sales team will provide you with the best service so that you can rest assured completely.
• 10,000+ Projects Delivered: Over 10K projects have been sent to our customers worldwide in recent years, and we have received countless positive comments.
• Low Price: Our customers can obtain maximum profits through the ISO management system and intelligent manufacturing to continuously reduce our costs.
• Massive Capacity: Our in-house facilities allow us to get your projects done fast. Thanks to our strong relationships with rapid materials partners, our capacity is not limited.
• Fast Delivery: Unlimited capacity, experienced engineers, and a flexible production system allow us to create your seals and production parts in a short period.
• 1,000+ Happy Customers: We aim to keep every customer happy with reliable quality, fast turnaround, and excellent services. We want all our new customers to become long-term customers.