Welch Vacuum 1376N Chemstar - Manual (Page 15)

15
Section 7: PUMPING SPEED CURVES
HIGH EFFICIENCY PUMPING
CHARACTERISTIC OF CHEMSTAR® PUMPS
The low RPM design of CHEMSTAR vacuum pumps makes it possible to maintain high pumping effi ciencies into the low
micron range. High RPM direct drive vacuum pumps, on the other hand, experience a rapid fall off of pumping speed
below 100 microns.
A comparison of the CHEMSTAR pumping speed curves shown below, versus high RPM pump speed curves conclusively
illustrates the superior performance of the CHEMSTAR pump.
What does that mean for the vacuum pump user? CHEMSTAR pumps provide considerable faster pump down time in the
low micron range.