Balz vertical spindle pumps have a reputation for being the best spindle pumps in the world. Most people attribute this to their patented bubble sealing system. On their VS series pumps, the bottom chamber design is like that of an upturned container which has been submerged into water.
This traps air and creates a barrier that seals the shaft. As long as this arrangement remains intact, water is prevented from reaching the bearings. This solves one of the most common problems associated with spindle pumps: contamination of the bearings, causing excessive wear.
On most conventional spindle pumps, the pump bearing housing is flooded when the pump is being used. This causes water or other media to contaminate the bearings and shortens their lifespan while lowering their efficiency. The Balz “bubble design” solves this problem and allows for more efficiency and longer bearing life.
The Balz VS100 series balance the thrust load by using opposing outlets. This eliminates vibration and creates a pump that runs more smoothly. It also prevents accidental phase reversal, which means the impeller won’t be dislodged and the pump won’t be harmed.
Since the lower and upper bearings are sealed and lubricated for life, there is no maintenance required. The immersion depth is up to 500 mm but it is able to withstand mild, occasional flooding.
In addition to the bubble sealing system protecting the bearings, the VS 100 series is manufactured with the best available materials. The result is a pump that is corrosion-resistant and has world class wear properties.
The VS 100 series can pump solids up to as high as 15 mm with a density as high as 1.3. Because of the high chrome and urethane content of the suction cover, casing and impeller, the VS 100 series can withstand even the most extreme pumping conditions.