ULVAC Vietnam Representative Office

Mechanical Booster Pump PMB-C Series

By using together with dry vacuum pumps, oil rotary vacuum pumps or water-sealed vacuum pumps, mechanical booster pumps can increase pumping speed in the range between 10kPa to 0.1 Pa, where roughing pump pumping speed drops.


These pumps use no oil in the pumping chamber resulting in stable performance even when evacuating water vapor or solvent vapors.


Actual pumping speed *150Hz3800m3/h
Maximum suction pressure50Hz8.0 x 102Pa
Ultimate pressure *26.7 x 10-1Pa
Allowable drive pressure1.0 x 10-3Pa
Motor (number of poles) *315kW (4P)18.5kW (4P)
Oil *4ULVOIL R-7
Oil capacity8.0L
Cooling waterCooling methodWater cooling
Primary side pressure0.1~0.3MPa
Inlet/outlet differential pressure0.05MPa
Cooling water volume10L/min
Cooling water temperature5 to 30℃
Suction diameter JIS B 2290Corresponds to VG250Corresponds to VG300
Exhaust port diameter JIS B 2290Equivalent to VF150Equivalent to VF200
External dimensions
L x W x H *5
772 x 1182 x 680mm772 x 1452 x 680mm
(without motor)
(without motor)
Standard backing pumpPKS-070PKS-070 x 2

Note) SI units are used in this specification. The following conversion can be used for non-SI units.
Ultimate pressure:6.7×10-1 Pa = 5×10-3 Torr,
Pressure:0.05/0.1/0.2/0.3 Mpa = ~0.5/0.1/2/3 atmospheres

*1 Measured value at 13 Pa
*2 Measured by pirani vacuum gauge (with standard backing pump and oil).
The value would be 6.7 x 10-2 Pa when measured with a McLeod vacuum gauge.
*3 00 VAC 50/60 Hz; 200 VAC 60 Hz; 3-phase
*4 Pump oil types other than the standard type are available. Contact ULVAC.
*5 W = width, D = depth, H = height