Turbo Pumps

LEYBOLD turbomolecular pumps produce a clean high or ultrahigh vacuum. They can be easily operated and provide excellent reliability. Pressures down to 10-10 mbar (0.75 x 10-10 Torr) can be reached in combination with adequately dimensioned roughing pumps.

LEYBOLD is one of the world’s leading manufacturer of turbomolecular pumps. Consequently, the TURBOVAC pumps are successfully used in many applications.

Below are listed the most popular models of Leybold turbo pumps, along with the appropriate frequency converters and cables. Please inquire about additional sizes and configurations.

Principles of Operation

The turbomolecular pump is a bladed turbine that compresses gases. By the momentum transfer from the rapidly rotating rotor blades to the gas molecules the non-directed thermal motion of the molecules is changed to a directed motion. Hence, the pumpingprocess ina turbomolecular pump results from the directed motion of the gas molecules from the inlet flange to the forevacuum port. In the molecular flow range- i.e. at pressures below 10-3 mbar (0.75 x 10-3 Torr) - the mean free path of the gas molecules is larger than the spacing between rotor and stator blades (typically some tenths of a millimeter). Consequently, the molecules collide primarily with the rotor blades with the result that the pumping process is highly efficient. In the laminar flow range- i.e. at pressures higher than 10-1 mbar (0.75 x 10-1 Torr) - the situation is completely different. The action of the rotor is diminished by the frequent collisions between the molecules. Therefore, a turbomolecular pump is not capable of pumping gases against atmospheric pressure and has to be backed by an adequate fore-vacuum pump. To create the directed motion of the gas molecules mentioned above the tips of the rotor blades have to move with supersonic velocity. Hence, a high rotational speed of the rotor is required. In case of LEYBOLD turbomolecular pumps the rotor speeds vary from about 36,000 rpm for large rotor diameters (e.g. TURBOVAC 1000, Å 20 cm (7.87 in.)) to 72,000 rpm for small rotor diameters (e.g. TURBOVAC 50, Å 6 cm (2.36 in.)

 

PART # PUMP
MODEL
FREQ-
UENCY CON-
VERTER
CONN-
ECTING CABLE
PUMPING SPEED ULTI-
MATE VACUUM 
INLET FLANGE FORELINE FLANGE COOLING METHOD WEIGHT PRICE
NEW
PRICE REBUILT 6 MONTH WARRANTY PDF
LEYBOLD TURBO PUMPS
60.10017.01 TURBOVAC 50 85400 NT10 10.5 FEET 12108 36 LITERS PER SECOND <3.75 X 10-8 KF40 KF16 CON-
VECTION
2 KG $3,634. CALL
60.10018.01 TURBOVAC 151 85635 NT20 10.5 FEET 85765 135 LITERS PER SECOND <0.75 X 10-10 ISO100 KF25 WATER-
COOLED
17 LBS $7,030. CALL
60.10019.01 TURBOVAC 361 85670 NT20 10.5 FEET 85765 340 LITERS PER SECOND <0.75 X 10-10 ISO100 KF25 WATER-
COOLED
26 LBS $10,650. CALL
60.10020.01 TURBOVAC 600C 800150V0015 NT20 10.5 FEET 85765 600 LITERS PER SECOND < 10-10 ISO160 KF40 WATER-
COOLED
37.5 LBS $12,545. CALL
60.10021.01 TURBOVAC 1000C 89483 NT20 10.5 FEET 85765 880 LITERS PER SECOND <0.75 X 10-10 ISO200 ISO63 WATER-
COOLED
55.1 LBS $21,836. CALL
60.10022.01 TURBOVAC 1100C 800040V1144 NT20 10.5 FEET 85765 750 LITERS PER SECOND <2.2 X 10-10 ISO200 KF40 WATER-
COOLED
48 LBS $22,257. CALL
FREQUENCY CONVERTERS
61.11047.01 NT10 90- 140 VOLT AC 85901 $1,835.
61.14049.01 NT10 180 - 260 VOLT AC 85900 $385.
61.11050.01 NT20  230 VOLT AC 85720 $4,033.
61.11023.01 NT20 120 VOLT AC 82721 $3,500.
CABLE
61.11048.01 10.5 FEET CABLE 12108 $185.
61.11051.01 10.5 FEET CABLE 85765 $185.