6
381497 USA 10-2014
APV
The following important cautions describe ways to avoid incorrect operating
procedures which will cause serious damage to the pump.
Cavitation
Cavitation is a condition within the pump which results in extreme hydraulic
forces which can create a risk of severe damage to pump components.
Cavitation makes a characteristic "rattling" noise. It is caused by operation
with low fluid pressure at the pump inlet.
To minimize this risk:
Install and operate the pump so that NPSH (net positive suction head)
available to the pump equals or exceeds the "NPSH required" as shown on
the pump performance curve. To increase NPSH available:
1. Decrease the temperature of the liquid being pumped.
2. Increase the height of liquid supply level.
3. Decrease the suction line length and remove restrictions to flow such as
elbows, valves, etc.
4. Increase the suction line size (diameter).
5. Reduce the pump flow rate (throttle discharge).
Corrosion Pitting
Stainless steel is subject to a risk of corrosion when improperly cleaned or
sanitized.
To minimize this risk:
1. Never use steel wool or a wire brush to clean stainless steel surfaces.
2. Iron particles will embed and cause corrosion pits. Use a non-metallic
brush or scrub pad for cleaning when required.
3. Never allow prolonged contact of sanitizing solutions or other corrosive
cleaning chemicals with stainless steel. Only use sanitizing solutions
immediately prior to processing.
Important Warnings
