Integrated (internal) product recirculation from pump discharge to seal chamber.
Circulation between the seal chamber and pump is created by seal chamber design
Product recirculation from pump discharge to seal through a flow control orifice.
Product recirculation from pump discharge through a Y strainer and a flow control orifice to seal chamber.
Product recirculation from seal chamber to pump suction via a flow control orifice.
Product recirculation from pump discharge to seal chamber through a flow control orifice and seal chamber back to suction through another flow control orifice.