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CIP Distribution Piping Systems 179
FIGURE 3 Portable clean-in-place return pump
mounted on astainless steel dolly.
true and comparable attention must be given to proper gasketing of all openings
except the one in use, to achieve the desired benefits of drawing air only through the
vessel outlet, and hence accomplishing CIP with an essentially empty vessel.
Whereas eductor return flow can be used as asole motivating force for short
CIPR runs involving minimal static head, an eductor-only return flow is most
commonly used in conjunction with gravity return. As an adjunct to gravity return,
the eductor will increase the flow rate achieved by gravity alone.
Eductor-Assisted Pumped Return Flow
Eductor-assisted return used in conjunction with either low- or high-speed return
pumps is extremely reliable and effective. High-speed return pumps, without selfpriming
casings or air relief valves, can be used in combination with small-diameter
FIGURE 4 Fixed base-mounted clean-in-place return
pump.