Plan 13

Description:

Product recirculation from seal chamber to pump suction though a flow control orifice

Features:

• Provides continuous vent for vertical pumps

For use:

• Whenever Plan 11 is not useable due to low pressure differential between pump discharge and seal chamber pressure
• Used on vertical pumps

Caution:

• Verify differential pressure between seal chamber and pump suction pressure
• Orifice size should be at least 1/8”