Plan 23

Description:

Product recirculation from seal chamber to heat exchanger and back to seal chamber

Features:

• Circulation is maintained by a pumping ring when pump is energized
• When pump is idle, circulation is maintained by thermosiphon effect
• Provides lower product stabilization temperature
• Can establish required fluid vapor point margin

For use:

• In hot and clean service such as boiler feed water and hot hydrocarbon services

Caution:

• Maintain less than 20” horizontal distance from seal chamber to heat exchanger
• Vent valve required at highest point of the piping system
• Seal chamber must have a close clearance throat bushing
• The seal outlet port must be facing up
• The cooler must be mounted above the pump centerline
• Fully vent the system before start up