5 Maintenance
5.1 Cleaning in place (CIP)
The DuraCirc pump range has been designed for Clean in Place (CIP) operation with both 3A and
EHEDG certification. However, due to variations in pumped products, system design, cleanliness
requirements and chemicals used we recommend that users develop suitable CIP processes during
commissioning on normal operating conditions and products and verify these meet the required levels
of cleanliness ensuring a minimum flow velocity of 1.5m/s.
To ensure optimum drainability of the rotorcase we recommned the pump is specified with vertical
porting (top/bottom).
Thermal Shock
Where metallic components are subjected to sudden changes in temperature the differing rates of
contraction / expansion experienced, especially where there are very small clearances, can allow
contact between the rotating and static parts potentially causing surface damage and pump seizure.
To minimise the risk of thermal shock occurring, it is recommended to ensure any temperature
changes have a differential of less than 50
o
C (90
o
F) and that the pump is left stationary for a
minimum of 15 minutes between sudden changes in process media temperatures before start up to
allow for temperature of the components to stabilise.
WARNINGS
Never
touch the pump or the pipelines when pumping hot liquids or when sterilising.
A suitable by-pass is recommended.
Always
handle cleaning agents with great care and follow instructions in the safety datasheets.
!
Always
rinse well with clean water after using a cleaning agent.
!
Always
use rubber gloves and protective goggles when handling caustic cleaning agents.
Always
store/discharge cleaning agents in accordance with current rules/directives.
200002348-1-EN-GB
23
EN
Summary of Contents for DuraCirc Range
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