High Quality Sealing Ring NBR FKM VMQ EPDM Material O-ring Wholesale

Seal rings are vital in preventing fluid or gas leakage across a wide range of
equipment. The material of the seal ring largely determines its effectiveness
and durability under specific conditions such as temperature, pressure, and
chemical exposure. Below are the most common seal ring materials and their
typical applications:

· Nitrile Rubber (NBR): Ideal for mineral oils, lubricants, and mildly
aggressive fluids. It performs well between –40°C and +120°C and is widely
used in automotive, hydraulic, and general industrial applications due to its
affordability and reliability.

· Fluorocarbon Rubber (FKM): Known for outstanding resistance to high
temperatures (up to +250°C) and aggressive chemicals. Commonly used in
chemical plants, engines, and fuel systems where sealing performance is
critical under extreme conditions.

· Silicone Rubber (VMQ): Offers excellent flexibility and low-temperature
resistance (down to –60°C). It is favored in food processing, medical
devices, and electronic equipment that require high hygiene and environmental
safety.

· Ethylene Propylene Diene Monomer (EPDM): Resists steam, water, brake fluids,
and ozone well. Frequently found in water treatment systems, solar heating
units, and outdoor applications.

· Polytetrafluoroethylene (PTFE): Chemically inert and resistant to almost all
aggressive substances. With high temperature tolerance and low friction, it is
suitable for chemical processing, pharmaceutical production, and cleanroom
environments.

· Hydrogenated Nitrile Rubber (HNBR): An upgraded version of NBR that provides
enhanced heat resistance and mechanical strength. It performs well in high-
pressure and dynamic sealing situations.

Selection Advice: Choosing the right seal ring material requires consideration
of multiple factors—operating temperature, fluid compatibility, pressure
range, dynamic vs. static use, and expected lifespan. For standard conditions,
NBR is often sufficient. In high-temperature or corrosive environments, FKM or
PTFE is recommended. For food-grade or medical applications, VMQ or EPDM is
more appropriate. Selecting the optimal material not only improves sealing
performance but also reduces downtime and maintenance costs, ultimately
enhancing overall equipment efficiency.

Minimum Order: 500 packs

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