Recirculation from pump discharge through a strainer, flow control orifice, and cooler to the seal chamber.
- Plan 21 with strainer. Strainer must be located before the orifice.
- The orifice size should be at least 1/8 in. [3 mm].
- A flow indicator, differential pressure indicator, or alarm is recommended to indicate strainer malfunction.
- Solids are removed from the flush stream, thus keeping the seal clean.