Dynamic Seal
For Elimination of Sealing Problems—Reduced Maintenance Costs
On tough pumping services, especially corrosives and slurries, mechanical seals require outside flush and constant, costly attention. Even then, seal failures are common, resulting in downtime.

Goulds offers the ANSI PLUS TM Dynamic Seal which, simply by fitting a repeller between the stuffing box and impeller, eliminates the need for a mechanical seal. Benefits of Goulds Dynamic Seal:

  • External seal water not required
  • Elimination of pumpage contamination and product dilution
  • Reduces utility cost
  • No need to treat seal water
  • Eliminates problems associated with piping from a remote source
At start-up, the repeller functions like an impeller, and pumps liquid and solids from the stuffing box. When pump is shut down, packing (illustrated) or other type of secondary seal prevents pumpage from leaking.
Besides being available as a complete unit, any Goulds 3996 can be easily field-converted to Dynamic Seal. Retrofit kits are readily available.