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Integral (internal) recirculation from the pump discharge to the seal chamber.
A Internal circulation
Dead-ended seal chamber with no recirculation of flushed fluid. Flush connections plugged.
A Flush connection plugged
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
Recirculation from the pump discharge through a flow control orifice into the seal chamber.
A Flow control
Recirculation from the pump discharge through a strainer and a flow control orifice into the seal chamber.
A Strainer B Flow control orifice
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
Recirculation from pump discharge through a flow control orifice and cooler into the seal chamber.
A Flow control orifice B Cooler C Temperature indicator
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