Page 51 - PCMI Journal December 2021
P. 51
Maintenance Tips For PCM Etching Equipment
Kirk Lauver, Marketing and Customer Lab Manager, Chemcut Corporation, US
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12/6/21
Maintenance Tips For PCM Etching Equipment Pumps
• Process pumps are usually centrifugal
• Either magnetic or direct drive sealless
• Typical centrifugal pumps cannot self-prime
• Magnetic pumps must be installed below fluid level in order to prime
• Sealless pumps are typically installed vertically with the impeller immersed
in the process fluid.
• Magnetic pumps are most often found as filtration, recirculation and rinse
pumps. They are also used as the main process pumps on smaller machines.
• Sealless pumps are usually the main process pumps
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Maintenance Tips For PCM Etching Equipment Pumps
Magnetic Pumps Typical Faults
• Wear or breakage of the support shaft
• Debris lodged between the housing and
magnet
• Debris caught in the impeller
• Magnetic debris sticking to the magnet
• Loss of magnetic “lock” between the impeller
and the drive magnet.
• For many faults with this type of pump, the motor will be running but the impeller will not be spinning.
Issue 138 December 2021 PCMI Journal 51
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