Mechanical Booster Pump PMB-C Series

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.


  • ModelPMB-040CPMB-060C
    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