Use of SCHMITT Pumps in Electroplating
Background of the application
In electroplating systems, circulation, filtration and bath maintenance directly affect coating quality. Electrolytes, activation and pickling solutions, and rinse water must be pumped uniformly and reliably.
Bath chemistry, temperature, metal content and the tendency to form particles, crystals or precipitates vary considerably. The material is therefore selected for each process; neither plastic nor stainless steel is universally superior.
Challenge
Corrosive fluids place demands on materials and seals. Particles, crystals and precipitates can affect bearings and narrow clearances. In electroless nickel service, PVDF requires a cleaning strategy; stainless steel with properly engineered anodic protection can reduce plate-out.
Solution
SCHMITT combines PP, PVDF and stainless-steel designs with a magnetic drive, mechanical seal or vertical installation. Our patent-pending NHM plain-bearing solution, together with the MPN in the corresponding SiC/SiC configuration, uses an externally mounted, generously dimensioned design without a plug-in shaft to increase mechanical stability in fluids with defined loadings.
Relevant series are NHM, MPN, U and T. For electroless nickel, UP, UP-DO and, on request, TE may also be considered; bath chemistry, stainless-steel compatibility and the anodic protection system are assessed together.
Advantages of SCHMITT Pumps in Electroplating
PP, PVDF or stainless steel are selected based on the electrolyte, concentration and temperature.
A well-designed operating point supports reproducible coating conditions.
For the NHM and the MPN in the corresponding SiC/SiC configuration, the externally mounted, generously dimensioned plain-bearing design and the absence of a plug-in shaft increase mechanical stability.
At defined levels of particles and precipitates, this bearing design is more robust than conventional plug-in-shaft solutions; permissible loading is assessed for the fluid and selected bearing pairing.
Magnetically coupled series reduce leakage risks with aggressive electrolytes.
PVDF with a maintenance strategy or stainless steel with anodic protection is assessed for each application.
Pumps for Electroplating (Selection)
- Hermetically sealed, magnetic coupling, PP or PVDF
- Up to 95 °C, flow rate up to 42 m³/h, head up to 27 m
- Up to 76% efficiency: best-in-class energy efficiency
- Sliding shaft technology: wear-free, maintenance-free and durable
- Hermetically sealed by contactless magnetic drive
- Special containment shell geometry for high pressures and temperatures
- Hermetically sealed, magnetic drive, PP or PVDF
- Up to 95 °C, flow rate up to 35 m³/h, head up to 32 m
- Extremely proven pump, used in more than 10,000 applications
- Insensitive to insufficient lubrication and partial dry running due to generously dimensioned plain bearings – no plug-in shaft
- Virtually maintenance-free in normal operation due to generously dimensioned plain bearings
SCHMITT Pumps
Horizontal plastic pumps
Horizontal Stainless-Steel Pumps
