Gas Binding:

Gas binding of a centrifugal pump is a condition whereas the pump casing is filled along with gases or vapors to the point whereas the impeller is no longer able to contact sufficient fluid to function appropriately. The impeller spins in the gas bubble, other than is unable to force liquid by the pump.

This could lead to cooling problems for the pump's bearings and packing.

Centrifugal pumps are designed so in which their pump casings are totally filled along with liquid during pump operation. Most centrifugal pumps could still operate while a small amount of gas accumulates in the pump casing, other than pumps in systems holdings dissolved gases which are not designed to be self-venting should be periodically vented physically to ensure which gases do not build up in the pump casing.