AFLAS seals - ESP Protector

AFLAS O-Rings in Petroleum Equipment: Applications, Advantages and Selection

October 16, 2026October 16, 2026 by zhang@aobo.biz

In electric submersible pump (ESP) systems and other downhole petroleum equipment, a failed O-ring is rarely a small problem — it is usually the reason a motor is pulled from the well. AFLAS O-rings have become a go-to compound for these duties because they hold their seal in hot oil, steam, hydrogen sulfide (H2S), CO2 … Read more

ESP Bag Protector Seals: Failure Modes and How to Specify Them

October 13, 2026 by zhang@aobo.biz

ESP bag protector seal in the foreground with the full size range of AFLAS protector bags in the background

ESP bag protector seals isolate motor oil from well fluid, equalise pressure and carry pump thrust. Here is how they fail in sour, hot and gassy wells — and how to specify AFLAS, HNBR or FKM bags correctly.