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.


Model PMB-040C PMB-060C
Actual pumping speed 50Hz 3,800 m3/h (63,300 L/min) 6,200 m3/h (103,300 L/min)
Maximum suction pressure 50Hz 8.0 x 102 Pa
Maximum allowable differential pressure 50Hz 5.9 x 103 Pa 5.1x103 Pa
Ultimate pressure *1 6.7 x 10-1 Pa
Allowable drive pressure 8.0 x 10-2 Pa
Motor Type of motor Totally enclosed fan cooled 3 phase induction motor
Energy efficiency class IE3
Power 15 kW (4 poles) 18.5 kW (4 poles)
(200V class)
50Hz 200 V
60Hz 200 / 220 V
Oil capacity    8 L
Cooling method    Water cooling
Cooling water Primary side pressure 0.3 Mpa
Inlet / outlet differential
pressure volume
0.05 Mpa
Cooling water capacity 10 L/min
Cooling water temperature *2 5 ~ 30 ℃
Inlet port JIS-B-2290 VG250 equivalent VG300 equivalent
Outlet port JIS-B-2290 *3 VF150 equivalent VF200 equivalent
Dimension W×D×H *4 772 x 1182 x 680mm 772 x 1452 x 680mm
T1 / T2 50Hz 1570 / 900 mm 1608 / 900 mm
60Hz 1570 / 940 mm 1608 / 940 mm
Weight 970 kg 1100 kg
Standard roughing pump PKS-070B PKS-070B x 2
Applicable standard -
Standard accessory without motor without motor
Option Motor voltage that differs from the voltage listed above.

Note) This specification uses SI measurement units. Conversion to non-SI units is as follows :
  6.7 x 10-1 Pa = 5 × 10-3 Torr
*1 Measured by Pirani vacuum gauge using a standard backing pump and standard vacuum oil.
*2 Use in an environment where there is no condensation.
*3 Outlet port (exhaust port) direction is able to select.
*4 For other dimensions, visit ULVAC web and refer to the posted CAD data.

Pumping Speed Curves


Dimension drawing

  PMB-040C PMB-060C
W 772 772
D 1182 1452
H 680 680

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