Product recirculation from pump discharge through a Y strainer and a flow control orifice to seal chamber.
1. Becomes a self-venting plan for horizontal pumps.
2. Can handle dirty liquids to some extent.
1. In general used in slightly dirty and non-polymerizing fluids.
1. Always ensure that orifice is placed after the Y strainer.
2. This plan is normally discouraged due to unreliability of Y strainer.
3. Calculation of recirculation is required.