Gene Vogel
EASA Pump & Vibration Specialist

Submersible pumps are a common machine repaired in EASA service centers. Almost all submersible pumps have dual seals, an upper (inner) seal and a lower (outer) seal. The chamber between those two seals is the seal chamber and it will be filled with some type of barrier fluid. The most common barrier fluid is oil; although, some models (Figure 1) are designed with a glycol solution barrier fluid. The proper barrier fluid for each model of pump will be listed in the pump operation & maintenance (O&M) manual, and EASA’s primary recommendation is to use the specified fluid. When the fluid specification cannot be found or when the specified fluid is not available for the repair, there are some general guidelines to follow that are offered here.

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