API Plans

Plan 62

Description: Plan 62 is an external source

supplying quench (nitrogen, water,

steam, etc.) on the atmosphere side of

the seal. Typically used with a throttle

bushing or auxiliary sealing device for


Objective: To reduce oxidation, coking or

crystallization of process accumulating on

the atmospheric side of the seal.

Advantages: Utilizes miniscule flow

rate of water or only a “whisper” of

nitrogen or steam (2‐4 psi). Can also

provide some heating or cooling.