API Plans

Plan 32

Description: Plan 32 is injection of a cleaner or cooler fluid to

the seal chamber from an external source, mixing into the

process stream.

Objective: Isolate fluid in the seal chamber from process. Using

a close‚Äźclearance throat bushing, the injected fluid can isolate

the seal from a process with poor lubricity, high temperature,

abrasive, dirty, corrosive, polymerizing, or oxidizing properties.

To provide cooling to the seal.

Advantages: Seal life can be extended

and vapor margin increased.

Caution: The cost of process dilution

and/or water removal sometimes exceeds

the savings created with longer seal life.