Fluoroelastomer Specialists
In Empowering Pumps’ article, “Types of Fluoroelastomer Seals for Pump Users: Explained,” the challenges of selecting the right fluoroelastomer (FKM) seals for aggressive pumping environments are explored. For pump engineers, balancing chemical resistance and temperature tolerance without overspecifying is key to maximizing seal performance and durability. With advancements in fluoroelastomer technology, engineers now have access to a range of FKM seals tailored to specific applications, though this variety can sometimes lead to overwhelming options.
Fluoroelastomer (FKM) seals are preferred for high-temperature and chemically aggressive environments, where resistance to oils, hydrocarbons, and gasoline is essential. Different types of FKMs offer specialized properties:
- Type 1 (VF2 + HFP): A common copolymer with balanced chemical resistance and bisphenol curing, offering all-around performance for general sealing needs.
- Type 2 (VF2 + HFP + TFE): This terpolymer has enhanced heat and chemical resistance, particularly against aromatic and low molecular weight hydrocarbons.
- Type 3 (VF2 + TFE + PMVE): Known for excellent low-temperature flexibility, it is peroxide-cured and adaptable to extreme environments, remaining flexible down to -40°C.
- Type 4 (VF2 + Propylene + TFE): Designed for high base resistance, this FKM type is primarily used in the automotive industry due to its susceptibility to swelling in hydrocarbons.
- Type 5 (VF2 + HFP + TFE + PMVE + Ethylene): With ethylene incorporated for added base resistance, this pentapolymer is used in specialty automotive applications.
Each FKM type offers distinct benefits, from high-temperature stability to resistance against specific chemicals, allowing pump engineers to select the best seal material for each application.
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Article with all rights reserved, courtesy of Empowering Pumps.
