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API Plan 02

API Plan 02

Dead-ended seal chamber with no recirculation of flushed fluid. Flush connections plugged.

A  Flush connection plugged


API Plan 03

API Plan 03

Circulation between the seal chamber and the pump created by the design of the seal chamber. Flush connections plugged.

A  Taper bore design of seal chamber
B  Flush connection plugged


API Plan 11

API Plan 11

Recirculation from the pump discharge through a flow control orifice into the seal chamber.

A  Flow control


API Plan 12

API Plan 12

Recirculation from the pump discharge through a strainer and a flow control orifice into the seal chamber.

A  Strainer
B  Flow control orifice


API Plan 13

API Plan 13

Recirculation from the seal chamber through a flow control orifice and back to the pump suction or pump suction piping.

A  Flow control orifice


API Plan 14

API Plan 14

Recirculation from pump discharge through a flow control orifice to the seal and simultaneously from the seal chamber through a flow control orifice to pump suction.

A  Flow control orifice


API Plan 21

API Plan 21

Recirculation from pump discharge through a flow control orifice and cooler into the seal chamber.

A  Flow control orifice
B  Cooler
C  Temperature indicator


API Plan 22

API Plan 22

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

A  Strainer
B  Flow control orifice
C  Cooler
D  Temperature indicator


API Plan 23

API Plan 23

Recirculation from a circulation device in the seal chamber through a cooler and back into the seal chamber.

A  Circulation device
B  Cooler
C  Temperature indicator
D  Vent
E  Drain


API Plan 31

API Plan 31

Recirculation from the pump discharge through a cyclone separator delivering the clean fluid to the seal chamber. The solids are delivered to the pump suction line.

A  Cyclone separator
B  Contaminated liquid IN
C  Clean liquid OUT
D  Separated liquid OUT