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API Plan 22

Recirculation from pump discharge through a strainer, flow control orifice, and cooler to the seal chamber.

API Plan 22

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Application Notes

  • 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.

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