Seal Spare Parts O-ring

Industrial Applications & Operating Limits of SEALCON O-Rings

O-ring is mainly used in fluid static application (For example, water, oil, air, chemicals solvent, chemicals, etc. ) . The temperature range is from -60 ℃ up to 220 ℃. The pressure in static application should be less than 20MPa, which varies with different materials. Sometimes O-ring is used in dynamic application with the pressure less than 5MPa and also used in semi-conductor vacuum seal. As a critical component, O-rings are essential mechanical seal spare parts that ensure leak-free connections and reliable performance across a wide range of industrial and precision applications.

Why Choose SEALCON O-Rings for Your Mechanical Seals?

When you partner with a professional Seal Spare Parts O-ring manufacturer like SEALCON, you gain three primary advantages:

• Unmatched Cost-Effectiveness: We optimize manufacturing processes to provide high-grade elastomers at competitive industrial pricing.

• Proven Reliability: Every O-ring undergoes strict quality control to ensure dimensional accuracy and material purity.

• Maximum Versatility: With thousands of molds for different styles and shapes, we provide quick-turnaround solutions for any industrial duty.

High-Performance Elastomer Materials: Selection Guide

Buna-N(NBR)
Buna nitrile is the most common elastomer used in mechanical seals. Depending on the exact compound, Buna is good for moderate temperatures, from about -35 °F to about 250 °F. Buna’s chemical resistance is narrow, and it is used mostly for water based applications. Buna is the lowest cost elastomer used in mechanical seals.

Fluoroelastomer (Viton/FKM)
Fluoroelastomers (Viton) offer the best all around chemical resistance value for mechanical seal applications. Fluoroelastomers can be used at continuous temperatures up to 400 °F. There are some applications — such as steam — and some specific chemicals — such as organic acids and ketones — where EPDM or Kalrez® are specified. While much more expensive than Buna, Viton is still moderately priced.

Ethylene Propylene(EPDM)
Ethylene propylene (EPDM) offers outstanding performance in steam and hot water. There are also specific chemical applications where EPDM is the best choice. EPDM is recommended for use up to 300 °F. EPDM is often priced between Buna and Viton.

Perfluorocarbon (FFKM)
FFKM offers excellent resistance to chemicals and extreme temperatures. Special compounds can operate beyond 300°C. FFKM is resistant to most chemicals including inorganic acids, alkalines, ketones, esters, alcohols, fuels, and hot water. It is ideal for applications in aggressive chemical environments.
Our Standard FFKM compound has outstanding heat resistance with service temperatures of -10°C to 310°C. Sealcon can offer direct equivalents to Kalrez, Simrez, Perlast, Chemraz, grades.

Aflas
Aflas is a specialty, non-conventional fluoroelastomer. A cousin of Viton, it offers higher heat resistance and performs well in high concentrations of acids, oxidants, and alkalis. Aflas is usually somewhat more expensive than Viton.

Kalrez
Kalrez is usually the most expensive elastomer option available. With specialty compounds available for use with nearly any chemical, and the ability to withstand temperatures up to 600 °F, Kalrez is an amazing elastomer. O-rings often cost hundreds of dollars each, so Kalrez is only used where absolutely necessary.

Specialty Elastomers
There are a variety of specialty elastomers on the market, most of which compete with one of the above materials. Sometimes these are specified by a seal or pump OEM, and Infinity Pump can source these materials for you.