4 How to handle stainless steel and other materials
Stainless steel corrosion
Corrosion such as rust might be caused by chemical attack. Use only cleaning liquids which are suitable
for use with stainless steel. Take care when deciding on the concentration, temperature and exposure
time of the chemicals, to avoid chemical attack.
Non-galling material
A494/CY5SnBiM (UNS# N26055) is the standard rotor material for MasoSine Certa series pumps. This non-
galling alloy is a nickel based, corrosion resistant material which was developed for use in positive
displacement pumps. It is listed in the 3- A Standards and is thereby accepted for use with product
exposed surfaces. Do not use in combination with highly concentrated nitric acid, for example, during
passivation of new stainless steel piping systems. In this case remove the rotor and the gate during the
passivation process to avoid damage or chemical attack. When removing the rotor, a double mechanical
seal or a quench with a lip seal is needed, and you should close the connections for the flushing fluid with
plugs to keep the liquid in the pump during the passivation process. Do not use a concentration of more
than 3% of nitric acid for the CIP cleaning fluid.
Handling of elastomers and plastic parts after the passivation process
Check elastomeric and plastic parts after passivation for chemical attack and replace them if necessary.
5 Information for returning pumps
In compliance with the regulations in your area concerning the control of substances hazardous to health,
you are required to declare the substances which have been in contact with product (s) you return to
MasoSine or its distributors. Failure to do so will cause delays. Please ensure that you email us this
information and receive a RGA (Returned Goods Authorisation) before you despatch the product(s). A copy
of the RGA form must be attached to the outside of the packaging containing the product(s).
Please complete a separate decontamination certificate for each product and attach it to the outside of
the packaging containing the product (s). A copy of the appropriate decontamination certificate can be
downloaded from the Watson-Marlow Limited website at www.wmftg.com.
You are responsible for cleaning and decontaminating the product(s) before return.
6 Environment and disposal of waste
Always observe the local rules and regulations with respect to safe disposal of
waste.
Enquire within your local government about the possibilities for reuse or environment-friendly processing
of materials, (contaminated) lubricant and oil. Dispose of materials safely, and in accordance with
regulations in your area.
• Stainless steel parts should be recycled where possible
• Plastic should be recycled where possible
• Oil, grease and lubricants should be washed out and disposed of properly according to local
regulations
• Elastomers should be recycled where possible
m-certa-en-08 5
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