Plan 53C

Description:
Pressurized barrier fluid system with pressure maintained and fluctuations compensated for in the seal circuit by a piston type accumulator
Features:
- Circulation is maintained by a pumping ring when equipment is energized, by thermosiphon effect when idle
- Heat is removed from the system by a heat exchanger (air or water cooled)
- Seal life optimized by maintaining clean fluid film between the seal faces
- No media leakage to the atmosphere
- Allows use of double seals lacking reverse balancing feature at the inboard seal when there is variable seal chamber pressure
For use:
- Where no leakage to atmosphere is allowed; hazardous, flammable, toxic fluids
- For dirty, abrasive or polymerizing fluids where media is unsuitable as a lubricant for the inboard seal faces
- Maintains constant pressure differential between the seal pot and the seal chamber (process) where pump pressure varies during operation
Caution:
- Connect reference line from the seal chamber to accumulator and keep it open
- There will always be some leakage of barrier fluid into product – verify compatibility
- Vent the system properly before start up
- Barrier fluid contamination can cause corrosive degradation of equipment