As with many innovations at Fristam Pumps, the FKL 580 was born of customer need.
A large processor in the southwestern United States had a cheese curd production facility and wanted to expand its capacity. The simple answer was to add more vats and lines.
The sinusoidal PD pumps that were in operation had been running at the high end of their capacity, spinning at up to 500 RPM. The overworked pumps required yearly rebuilds, sending maintenance costs soaring.
The company explored rotary-style PD pumps with higher capacity. They considered the FKL 600, which has a displacement of 2.24 gallons/revolution.
Thanks, But No Thanks
Though it cleaned well, it was not originally designed to 3-A standards. It was imperative that any new pumps the company installed were completely in-place cleanable. [NOTE: the FKL 600 has since been designated as CIP'able by 3-A (with rotors removed).]
So, Now What?
What if Fristam could provide large pumps that were certified CIP’able? That would be great, the company thought, but we need them in six months.
Is there any way Fristam could design, test, and build a pump like that in six months? The answer was simple: we’ll do whatever it takes to make it happen.
Rather than redesigning the FKL 600, Fristam engineers kept its gearbox, but designed a new pump head. Two months later, the concept for the 580 was completed. As the new pump was being manufactured, the company tested a 600 to see if an FKL could meet the suction lift requirements and handle the duty. It did. They were impressed with the results and even noted that the pump ‘cleaned up well.’
Fristam engineers did manage to deliver four FKL 580s only six months later.
With a capacity of 1.82 gallons/revolution, the 580 met the demand while only running at 170 RPM. Running the pump slower than the previous pump (along with its circumferential piston design) caused less stress and wear on the pump, minimizing maintenance costs. Also the curd was not compromised. Taste, texture, and quality were preserved.