Custom Masters/Flo King
Phone: 407-331-4634
Fax: 407-331-0575

FAQ

WHICH PUMP MATERIAL OF CONSTRUCTION IS BEST FOR HOT ELECTROLESS NICKEL?

• Some customers are able to use CPVC (gray in color) as the pump material of construction for EN baths up to 185 or 190 F (85 to 88 C) or even slightly higher temperatures. But CPVC may become brittle, then crack and split over time in some formulations. CPVC is our standard and least-expensive pump material of construction.
 
• Polypro (white) is sometimes preferred as the pump material of construction for EN if the temperature is maintained at 190 F (88 C) or slightly higher. Polypro units at temperatures well over 195 F (90 C) tend to warp, causing pump failure. Polypro costs about 20 percent more than CPVC.
 
• Kynar (PVDF) is preferred as the pump material of construction for EN baths significantly above 190 F (88 C). Kynar (yellowish-white in color) costs about 60 percent more than CPVC and 40 percent more than polypro.

CORROSION INSTALLATION WARNING FOR EN
In highly corrosive, hot, steaming environments such as this, the Flo King pump must be mounted in a well-ventilated location for maximum motor life. The pump must not be mounted in front of the ventilation exhaust, as this will have the effect of putting the motor in a continuous path of hot, corrosive fumes.

FILTER CARTRIDGES FOR EN
For in-tank filtration of electroless plating baths, the most popular strategy is to use fairly short filter cartridges — 10-inch long (25 cm) for many applications — and change them very frequently. This helps to reduce plate-out on the cartridges themselves as particulates are captured on the filter fibers.