Welch Vacuum 1397 Duoseal Belt Drive User Manual
Page 15

15
Section 7: PUMPING SPEED CURVES
HIGH EFFICIENCY PUMPING CHARACTERISTIC OF DUOSEAL® PUMPS
The low RPM design of DuoSeal 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 DuoSeal pumping speed curves shown below, versus high RPM pump speed curves
conclusively illustrates the superior performance of the DuoSeal pump.
What does that mean for the vacuum pump user?
DuoSeal pumps provide considerable faster pump down time in the low micron range.
This manual is related to the following products: