API Plans

Plan 53A

Description: Plan 53A is an

external reservoir,

PRESSURIZED greater than

the seal chamber pressure.

Provides clean BARRIER fluid

to an Arrangement 3 dual

seal. Typically pressure is

provided by nitrogen gas

below 200 psig. Circulation

provided by an internal

pumping ring.

Objective: Provide

favorable environment for

long seal life. Ensure zero

process emissions to environment.

Advantages: Prevents human and

environmental contact with

process. Enhanced cooling

available using cooling coils. Best

for toxic, hazardous, polymerizing,

abrasive fluids and light