Dairy Establishment Inspection Manual – Chapter 14 - Aseptic Processing and Packaging Systems
1.14.17 Stuffing Pump
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Stuffing pumps may be used to improve the efficiency of other devices, such as homogenizers.
1.14.17.01 General Conditions
Stuffing pumps are usually centrifugal pumps. They must be constructed of stainless steel or a suitable corrosion resistant material and must be clean and in good mechanical condition. Painted exterior surfaces must also be clean and in good condition, free of flaking paint and rust.
All pumps not specifically designed for CIP use must be disassembled for cleaning. This includes removal of impellers and back plates for cleaning.
All pumps installed in the sterile zone must be of an aseptic design.
1.14.17.02 Proper Installation/Operation
Product stuffing pumps must be inter-wired with the flow control device electrical operating signal. When the flow control device is prevented from operating, either by the operator or operating system and /or by safety interlocks installed on the system, the stuffing pump and other flow-promoting devices must stop. Stuffing pumps may be configured to start prior to starting the homogenizer, but the FCD must be in an allowed to run condition.
When a stuffing pump is used in an aseptic processing and packaging system it must be installed and operated in such a way that it will not influence the proper pressure relationship within the regeneration section, and it must not reduce the holding time below the required minimum.
If the homogenizer is used as a flow control device, a centrifugal type stuffing pump may be installed between the raw product outlet of the regenerator and the inlet manifold of the homogenizer to supply the desired pressure to the homogenizer.
Tests are performed upon installation, at least once every 6 months thereafter and when micro-switch is re-set or replaced. Appropriate records must be kept to show proper testing has occurred.
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