API Plan 21 Cooled Flush
API Plan 21 adds a cooler to Plan 11 for applications requiring better control of flush vapor margin. Flow is routed from the discharge side of the pump through an orifice and a cooler before being returned to the seal chamber.
- Provides cooled flush fluid to the process side of the seal
- Removes heat and flushes particulate from the seal chamber
- Reduces coking or polymerization
- Improves fluid vapor margin in the seal chamber
See page 15 of the Mechanical Seal Support Systems Applications Guide for additional details.