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API Plan 66A

Description:

Throttle bushing in seal gland restricts seal leakage in event of seal failure. Pressure increase is detected by a pressure transmitter.

Features:

  1. Normal leakage passes, inner restriction bush to drain.
  2. Excess leakage is restricted by inner bush from leaving seal gland causing pressure increase, which is sensed by the pressure transmitter.
  3. Leakage is directed to liquid recovery system or sump.

Uses:

  1. Intended for use with arrangement 1 seals where it is required to limit leakage in case of seal failure.

Caution:

  1. Drain connection must be at the bottom position.
 
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