Calender Machine Servo Valve Sticking Solution With Oil Purification, 2003 Fall Technical Conference
In January 2003, ISOPur Fluid Technologies and a major paper company conducted a trial of a fluid purification
system on an offline paper calender machine. The trial was conducted to test the effectiveness of the Balanced
Charge Purification technology as a solution to prevent servo valves from sticking. The trial ran from January 14th
until June 19th with no reported valves sticking or failing. Water content is down to 28ppm (Karl Fischer), the
average viscosity is 206 cSt (within 2% of a new oil reading), and ISO codes have reached lows of 16/14/11; well
below the new oil reference of 18/17/14. These results indicate that the technology substantially improves oil
quality and helps to prevent servo valve sticking.