EPDM O-Ring, FDA Certified Food Grade Sealing Ring

EPDM O-rings with FDA food-grade certification, PTFE FEP coated sealing rings, perfluoroelastomer (FFKM) O-rings, food-grade stainless steel combination washers, B-S oil seal screw sealing washers, ED rings - ED seals from Suzhou seal manufacturer, high-temperature resistant FKM fluororubber O-rings, USP VI medical-grade medical equipment seals manufacturer

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. We sell 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, O-rings, oil seals, gaskets, packings, and more.

EPDM Material Introduction:
EPDM is a terpolymer of ethylene, propylene, and non-conjugated diene. Its main characteristics are superior resistance to oxidation, ozone, and corrosion. As part of the polyolefin family, EPDM has excellent chemical resistance. Among all rubbers, EPDM has the lowest specific gravity. It can absorb large amounts of fillers and oils without significantly affecting its properties, making it suitable for cost-effective rubber compounds. EPDM features outstanding aging resistance, electrical insulation, and ozone resistance. It can be heavily oil-extended and filled with carbon black, resulting in lower-cost products. Its chemical stability, wear resistance, elasticity, and oil resistance are comparable to styrene-butadiene rubber.
EPDM is widely used in tire sidewalls, sealing strips, inner tubes, and automotive components.

Product Characteristics:
1. Aging Resistance: EPDM has excellent resistance to weather, ozone, heat, acids, alkalis, steam, color stability, electrical properties, oil extension, and fluidity at room temperature. EPDM products can be used long-term at 120°C and briefly or intermittently at 150-200°C. Suitable anti-aging agents can increase its service temperature. Peroxide-crosslinked EPDM can be used under harsh conditions. EPDM can withstand over 150 hours without cracking under 50 pphm ozone concentration and 30% elongation.
2. Corrosion Resistance Rating Volume Swelling Rate/% Hardness Reduction Impact on Performance 1 lt;10<10 Slight or none. 2. 10-20<20 Minor 3. 30-60<30 Moderate. 4 60="">30 Severe
3. Steam Resistance: EPDM has excellent steam resistance, even better than its heat resistance. After nearly 100 hours in 230°C superheated steam, its appearance remains unchanged. In contrast, fluororubber, silicone rubber, fluorosilicone rubber, butyl rubber, and natural rubber show significant deterioration under the same conditions in a shorter time.
5. Hot Water Resistance: EPDM also performs well in hot water, but this is closely related to the vulcanization system. EPDM vulcanized with dicumyl peroxide and TMTD shows minimal change in mechanical properties and only 0.3% volume expansion after 15 months in 125°C superheated water.
6. Electrical Properties: EPDM has excellent electrical insulation and corona resistance, outperforming styrene-butadiene rubber, chlorosulfonated polyethylene, polyethylene, and crosslinked polyethylene.
7. Elasticity: Due to the absence of polar substituents in its molecular structure and low cohesive energy, EPDM maintains flexibility over a wide range, second only to natural rubber and polybutadiene rubber, and remains flexible at low temperatures.
8. Adhesion: EPDM lacks active groups in its molecular structure and has low cohesive energy, making it prone to blooming and resulting in poor self-adhesion and mutual adhesion.

Product Applications:
Excellent weather resistance, ozone resistance, water resistance, and chemical resistance. Suitable for use with alcohols and ketones, as well as in high-temperature steam environments. Ideal for bathroom fixtures, automotive radiators, and brake systems. Not recommended for food applications or use with mineral oils. General temperature range: -55°C to 150°C.

Advantages of O-rings:
1. Suitable for various sealing forms: static seals, dynamic seals.
2. Compatible with various materials; sizes and grooves are standardized for high interchangeability.
3. Suitable for multiple motion types: rotary motion, axial reciprocating motion, or combined motion (e.g., rotary-reciprocating motion).
4. Compatible with various sealing media: oil, water, gas, chemicals, or other mixed media.
5. By selecting appropriate rubber materials and formulations, effective sealing for oil, water, air, gas, and various chemicals can be achieved. Wide temperature range (-60°C to +220°C); with reinforcement rings, pressure resistance up to 1500 kg/cm² in static applications.
6. Simple design, compact structure, easy installation and removal.
7. O-rings have a simple cross-section and self-sealing action, ensuring reliable sealing performance.
8. Both O-rings and their installation parts are simple and standardized, making installation and replacement easy.
9. Wide variety of materials available for different fluids: nitrile rubber (NBR), fluororubber (FKM), silicone rubber (VMQ), EPDM, neoprene (CR), butyl rubber (BU), PTFE, natural rubber (NR), etc.
10. Low cost.
11. Low dynamic friction resistance.


After-Sales Service:
Yongxin Seals provides material certifications for all products, ensuring customers can buy and use with confidence, without worries. Customized packaging and shipping methods are available to meet different cleanliness requirements. We welcome inquiries and cooperation from trading partners!

Technical Support:
Yongxin Seals offers technical support in the sealing field. Our engineering team has over 10 years of experience and is ready to assist customers with product sealing design, material selection, and aging tests. We welcome inquiries from industry peers and those in need of seals.
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