A lack of straight pipe run causes the water to have an asymmetrical flow pattern in the pipe. This creates a vacuum suction that causes high pressure shock waves to the pump’s impeller, resulting in the impeller blades pitting and quickly wear out. There are 3 pumps pumping water from the main header. Previously, the pumps lasted for 3 to 6 months before requiring an impeller replacement which costs a significant amount of down time, labour and material cost. Preliminary studies have shown that the first and last pump (pumps A and C) are subjected to the most amount of cavitation.
Line size: 8”
Process connection: 150# 8” flange
Discharge Pressure: 8 bars
Pump Temperature: 35 degrees
Flow rate: 150 cubic meters/hour
Motor rating: 75 kW
Media : Water
At the point in time when the Vortab was ordered, the pump A was not serviceable anymore. During the shutdown period, the Vortab was installed where the strainer once was, giving a small amount of sufficient straight run before the water enters the pump. The large strainer was being replaced by a smaller strainer upstream of the Vortab.
VSR – 08.00-2-5-0-1
8 inches Standard 316 SS 150# ANSI flanged unit.
Solves the issue: After having the Vortab installed for a year, the pump did not show signs of cavitation and is still in perfect functioning condition.
Prevents loss of productivity: When the impellers are severely damaged and the pump is unable to function, the process has to be stopped and the parts need to be replaced. This results in loss of productivity, labour and material cost to repair.