…Supplying a World
Under Pressure
VACUUM PUMP
OPTIONS: WHICH TYPE OF PUMP IS BEST FOR
YOU?
VACUUM PUMP SELECTION CRITERIA
ROTARY VANE: VANE PUMPS ARE OIL SEALED PUMPS USED FOR PUMPING
CLEAN, DRY, NON-REACTIVE GASES. THEY CANNOT HANDLE ANY LIQUID SLUGS. THE
PRACTICAL VACUUM LIMITATION IS ABOUT 5 X 10-4 TORR( 2 STAGE) and .5 TORR FOR
SINGLE STAGE. THESE PUMPS ARE USUALLY AIR COOLED, DIRECT DRIVEN AT 1750 RPM,
AND HAVE A SMALL FOOTPRINT FOR SPACE SAVINGS. RELIABILITY IS EXCELLENT WITH
REGULAR OIL CHANGES AND PERIODIC VANE/FILTER CHANGES REQUIRED. PRICING IS VERY
MODERATE GIVEN THE VACUUM THEY PRODUCE.
LIQUID RING: THESE PUMPS ARE USED FOR MODERATE TO HEAVY VAPOR LOAD
CONDITIONS. A LIQUID SEALANT IS USED WITH OPERATIONAL VACUUM LIMITED TO ABOUT
30 TORR WITH WATER. HIGHER VACUUM IS ATTAINABLE WITH THE USE OF OIL, GLYCOL, OR
OTHER LOW VAPOR PRESSURE FLUID. ULTIMATE VACUUM WILL BE TWICE THE VAPOR
PRESSURE OF THE SEALANT. THIS TYPE OF PUMP IS DESIRABLE BECAUSE IT CAN BE
SEALED WITH A FLUID COMPATIBLE WITH THE PROCESS GAS/VAPOR THAT WOULD HARM OTHER
TYPES OF PUMPS (I. E. : OIL SEALED) AND IS RELATIVELY INEXPENSIVE. RELIABILITY IS HIGH BECAUSE OF ITS
SIMPLICITY.
DRY RUNNING: DRY PUMPS ARE IDEAL FOR ANY APPLICATION WHERE OIL
CONTAMINATION IS UNDESIRABLE OR UNACCEPTABLE. THEY PRODUCE CLEAN, DRY VACUUM
WITH NO REQUIREMENT OF OIL OR WATER; ELIMINATING POLLUTION AND REDUCING ENERGY
CONSUMPTION. ULTIMATE VACUUM IS 0.02 TORR WITH LOW VIBRATION AND NOISE LEVELS.
PRICING IS HIGH. USED IN BOTH ROUGH AND MEDIUM VACUUM.
ROTARY PISTON: ROTARY PISTON VACUUM PUMPS ARE INDUSTRIAL GRADE
HEAVY DUTY PUMPS MADE TO OPERATE IN A VACUUM RANGE OF 50 TO .01 TORR. SUCH PUMPS
ARE USED WHERE CONTAMINANTS (BOTH LIQUID AND PARTICULATE) ARE HIGH AND MUST BE
HANDLED BY THE PUMP. RELIABILITY IS MODERATELY HIGH GIVEN THE ABUSE THESE PUMPS
ARE SUBJECTED TO. PRICING REFLECTS THE PERFORMANCE OF THESE PUMPS AS HIGH
VACUUM PRODUCERS WHILE ALSO BEING ABLE TO HANDLE LARGE AMOUNTS OF CONTAMINANTS.
VACUUM BOOSTERS: ROTARY LOBE “ROOTS” VACUUM BOOSTERS ARE USED TO
EXTEND THE VACUUM LEVEL AND/OR THE PUMPING CAPACITY OF THE VACUUM PUMP BY A
FACTOR OF 2-10. THE BOOSTERS ARE GAS ACCELERATORS WHICH INCREASE THE FLOW OF
GAS BEING FED TO THE VACUUM PUMP, THEREFORE INCREASING THE CAPACITY OF THE
EXISTING VACUUM EQUIPMENT. BOOSTER PRICING IS EXTREMELY MODERATE.
… What’s Your Torr?
CACEJEN VACUUM, INC.
42225 REMINGTON AVE, SUITE A23, TEMECULA, CA 92590, O 951.296.3980 C
951.240.6147 WWW.CACEJEN.COM
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