O-ring VITON low-temperature GLT fluororubber O-ring FKM sealing ring

O-ring VITON low-temperature GLT fluoroelastomer O-ring FKM sealing ring, FVMQ fluorosilicone food-grade medical-grade sealing ring, extra-large size large-dimension sealing ring NBR FKM fluoroelastomer VITON EPDM, VITON fluoroelastomer FKM rubber sealing ring, WRAS certified EPDM ethylene propylene diene monomer sealing ring, high-temperature resistant FKM fluoroelastomer O-ring sealing ring.

Company Introduction:
Suzhou Yongxin Technology is a supplier of sealing components in motion and control systems, providing sealing solutions for transmission control, automation equipment, and aviation, selling various seals, hydraulic, pneumatic, and fluid control products and components. In terms of seals, Yongxin offers hydraulic and pneumatic sealing products, including dynamic seals, static seals, sealing rings, oil seals, gaskets, packing, etc.

Product Description:
Custom Processing: Yes
Material: Fluoroelastomer
Cross-Section Shape: O-type / Special-shaped dimensions
Function: Fixed sealing
Performance: High-temperature resistance, high-pressure resistance, corrosion resistance, wear resistance
Temperature: 300°C, Operating Pressure: 100 MPa

Fluoroelastomer Sealing Ring Introduction:
Fluoroelastomer is a copolymer of vinyl fluoride and hexafluoropropylene. Depending on its molecular structure and fluorine content, the chemical resistance and low-temperature performance of fluoroelastomer vary. Fluoroelastomer is renowned for its excellent flame retardancy, superior airtightness, high-temperature resistance, ozone resistance, weather resistance, oxidation resistance, resistance to mineral oil, fuel oil, hydraulic oil, aromatic compounds, and many organic solvents and chemicals.
For general grades, the operating temperature for static sealing is limited to approximately -26°C (-15°F) to 282°C (450°F), although it can still be used for short periods at 295°C, but its service life will shorten when the temperature exceeds 282°C. For dynamic sealing, the suitable temperature range is between -15°C and 280°C. Low temperatures can reach -40°C.
Hardness: Between 50 and 90 degrees (Shore A).
Color: Black, blue, green, brown.
Abbreviation: FKM/FPM
Application Scope: Automotive, doors and windows, electrical appliances, bearings, pumps, cylinders, rollers, water pipes, chemical pipelines, valves.
I. Precautions for Using FKM (VITON) Fluoroelastomer O-rings
Fluoroelastomer has excellent physical and chemical properties, including high-temperature resistance, oil and wear resistance, chemical corrosion resistance, and good aging and ozone resistance. It can operate at temperatures up to 200°C or below, allowing short-term operation without oil. Even under extremely harsh conditions, it maintains excellent wear resistance. FKM O-rings made from DuPont VITON raw materials exhibit even more outstanding performance. Under normal working conditions and temperatures below 220°C, fluoroelastomer is very stable and harmless. However, when exposed to high temperatures above 300°C, such as from a gas cutting torch, fluoroelastomer can release harmful gases. Inhaling these gases or getting them into the eyes can harm human health. Therefore, it is essential to ensure that fluoroelastomer sealing rings are not used significantly beyond their normal operating temperature.
II. FKM (VITON) Fluoroelastomer O-rings
We know that sealing rings rely on external force deformation to generate rebound force for sealing. The elasticity and tensile strength of rubber are crucial indicators of sealing ring quality. Yongxin Sealing uses imported rubber materials and advanced production processes to ensure high elasticity and excellent tensile strength of sealing rings. Rubber elasticity is generally expressed by rebound rate, and sometimes by elongation and permanent deformation; imported materials have high elongation, low permanent deformation, and high elasticity. High elasticity is mainly related to molecular weight, conformational entropy of coiled molecules, crosslink density of vulcanized rubber, and the type of crosslinks. Higher molecular weight of rubber is beneficial for improving elasticity. Moderate crosslinking can reduce or eliminate slippage between molecular chains, which is conducive to improving elasticity. Additionally, polysulfide bonds with lower bond energy and less restraint on molecular chain movement result in better rebound elasticity.
III. Stretching and Compression of FKM (VITON) Fluoroelastomer O-rings
Stretching and compression are the two basic forms of O-ring installation in grooves. The compression force is determined by the initial deformation degree of the O-ring and the hardness of the sealing material. Yongxin Sealing's imported rubber materials fundamentally ensure various parameters of the sealing products, including good stretching and compression indices. When used as "inner circle sealing," the maximum circumference compression of the rubber ring is 1%. Exceeding this limit will affect the working life of the rubber ring. When used as "outer circle sealing," the inner diameter after stretching should be larger than the outer diameter of the groove, with a maximum elongation of 3% (inner diameter > 50mm) or 5%. If the pressure comes from the inside, the outer diameter of the sealing ring should contact the outer diameter of the groove (with circumference compression less than 1%). If the pressure comes from the outside, the inner diameter of the rubber ring should contact the inner diameter of the groove, with a maximum allowable stretch of 3%.

O-ring Performance Introduction:
O-ring sealing rings refer to rubber rings with an "O"-shaped cross-section. They are widely used in hydraulic and pneumatic transmission systems. They are mainly used to prevent leakage of liquid and gas media under static conditions in mechanical components. In some cases, O-rings can also be used as dynamic sealing elements for axial reciprocating motion and low-speed rotational motion. They have a simple structure, easy installation, low cost, easy maintenance, and diverse materials. They can be used for sealing various fluids such as oil, water, and gas. Depending on different conditions, different materials can be selected accordingly. From the perspective of sealing principles, O-rings are a type of extrusion seal. The basic working principle of extrusion seals is to rely on the elastic deformation of the sealing element to create contact pressure on the sealing contact surface. If the contact pressure is greater than the internal pressure of the sealed medium, no leakage occurs; otherwise, leakage occurs.

Marking Method:
O-ring specification representation: Inner diameter * Cross-section diameter (ID * C/S)
Available standards: National Standard GB3452.1 series, American Standard AS568 series, Japanese Standard JIS B 2401 series
★Note: Non-standard sizes can also be customized.
O-ring Design Reference:
Working pressure: 0~70 MPa (high pressure requires adding backup rings)
Speed: Maximum reciprocating speed up to 0.5 m/s, maximum rotational speed up to 2.0 m/s
Operating temperature: -60°C~320°C
Working media: Various lubricating oils, liquids, and gases
Relationship between material hardness and working pressure
The hardness of an O-ring is directly related to its pressure resistance. Generally, the higher the hardness of the O-ring, the stronger its high-pressure resistance.
Hardness (Shore A) / degrees: 50±5, 60±5, 70±5, 80±5, 90±5
Working pressure static seal/MPa: ≤ 0.5, 1, 10, 20, 50
Working pressure (reciprocating motion, speed ≤ 0.2 m/s)/MPa: ≤ 0.5, 1, 8, 16, 24
Operating temperature range of different synthetic rubbers
Various existing synthetic rubber materials can meet the working temperature requirements of O-rings under different conditions. Depending on the product's working conditions, suitable O-ring rubber materials can be selected.

Groove Design Reference:
The O-ring in the groove will deform under the drive of medium pressure, and the edge part of the O-ring will flow into the gap position to achieve the sealing function of the O-ring. The greater the pressure on the O-ring, the greater the deformation, resulting in better sealing effect. When the pressure on the O-ring exceeds its承受较限, the O-ring will be squeezed into the gap, causing sealing failure. Therefore, the design of the O-ring groove must be reasonable.

Our Manufacturing Quality Control:
Incoming Inspection:
All raw materials are tested before storage, and corresponding physical property reports of the raw materials are issued and compared with the physical property reports provided by the raw materials. Only when the test values of the two physical property reports match can the materials be stored.
Mold Inspection:
After mold development is completed or molds are cleaned and put on the machine, we will inspect the full dimensions of the mold to ensure consistent product quality for each cavity.
In-process Inspection:
During the production process, in-process inspectors regularly inspect semi-finished products to ensure the rationality of the process and control the defect rate within a reasonable range.
Quality Control:
The quality department conducts appearance inspections on each batch of products.
Full Inspection of Finished Products:
Optical full inspection machines ensure that the appearance and dimensions of the products meet high standards.

Our Raw Material Advantages:
The realization of our company's solid partnership with customers depends on the following basic aspects: material applicability, innovative strength, strict quality management, and extensive experience in functional integration. We have over 20,000 sets of molds and a vast raw material database, with sufficient experience to handle sealing issues in various media and working conditions. During procurement, sealing components are sometimes classified as Category C materials based on importance and function, but in fact, sealing components should belong to Category A materials. Hydraulic and pneumatic valve seals are the core components of this technology.
Since the company started production, technological reliability, system efficiency, environmental solutions, and solid customer partnerships have driven continuous development. Through the additional characteristics provided by various seals, we demonstrate our expertise in functional integration. IBG fully proves that it has sufficient experience to handle the interaction between seals and various media and lubricants.
Close cooperation with DuPont, JSR, and Dow Corning, as well as a vast raw material formula database, ensure the relative stability of our raw material properties and controllable product quality. Our independent rubber formula design capability allows us to better meet the actual working condition needs of customers.

After-sales Service:
Yongxin Sealing provides material certificates for all products, allowing customers to buy and use with confidence, without any worries! Customized packaging and delivery methods are available according to customer requirements, meeting different customers' cleanliness requirements for products. We also welcome inquiries and cooperation from trading partners!

Technical Support:
Yongxin Sealing experts in the sealing field provide technical support. Our engineering team also has over 10 years of experience and is ready to help customers solve product sealing design problems, material selection difficulties, sealing aging test issues, etc. We welcome inquiries from peers and friends in need of sealing components.