Moulded from AFLAS (FEPM / tetrafluoroethylene-propylene copolymer) with a service temperature range of −20 to 250 °C. Mainly used in petroleum equipment, these O-rings give excellent oil resistance up to 250 °C together with excellent resistance to steam, sulphuric acid and hydrogen sulfide.
AFLAS is the standard O-ring compound used across ESP motors and protectors (including the 456 and 562 series) and is widely specified for downhole sealing wherever amine corrosion inhibitors, CO₂ and steam are present. We supply standard and custom sizes, including O-rings for protector seals, motor heads and potheads.
AFLAS (FEPM / TFE-P) is a tetrafluoroethylene-propylene copolymer, not a conventional fluoroelastomer. That chemistry gives it a combination no FKM can match: resistance to hot water and steam, to strong acids and alkalis, and to amines and H2S, with continuous service well above 200 °C. It is the default compound for ESP downhole sealing.
Key Features
- Material: AFLAS (FEPM / TFE-P)
- Temperature: −20 to 250 °C
- Resists: oil, steam, sulphuric acid, H₂S, CO₂, amines
- Sizes: standard and custom
Typical Applications
- ESP motor protectors, potheads and motor lead extensions
- Downhole tools exposed to hot oil, steam and produced water
- Steam-injection and thermal-recovery (SAGD/CSS) wells
- Amine treating units and sour-water service
- Chemical process equipment handling acids, alkalis and hot water
Custom Options & Ordering
- Sizes: AS568 standard and custom moulded diameters
- Compounds: AFLAS / FEPM (TFE-P)
- Temperature: up to 250 °C continuous
- Moulded to drawing or made from customer sample
Request a Quote
Tell us your medium, working temperature, pressure and dimensions and we will recommend the compound and geometry for your duty. Reach our engineering team at sales@aobo.biz or +86-573-87855272, or use our contact page.