Girovac Ltd


NGB pumps are standard NXDS/XDS pumps but with the gas ballast feature removed. They are for applications where it is advantageous to have the control knob and machining removed so that it cannot be accidentally opened. Example applications include rare gas recirculation and gas recovery.
Note: Mains leads must be ordered separately, please see the catalogue entry for the relevant standard NXDS/XDS pump for the correct mains lead.


• Lubricant-free within the vacuum envelope and hermetically sealed means a totally clean and dry vacuum to prevent cross contamination.
• No atmosphere to vacuum shaft seals means bearings are completely isolated, this prevents process attack and enable the bearings to run cooler and last longer.
• No oil to change eliminating cost of contaminated oil disposal.
• Simple single sided scroll design allows maintenance to be done in minutes for low cost of ownership and maximum up-time.
• Inverter drive for consistent pumping speeds worldwide.



Nominal rotational speed 1750 rpm
Displacement 43.0 m3h-1  /  25.0 ft3min-1
Peak pumping speed 35.0 m3h-1  /  21.0 ft3min-1
Ultimate vacuum (total pressure) 0.020 mbar  /  0.008 Torr
Pumping speed at minimum rotational speed 9.9
Maximum continuous inlet pressure 35 mbar
Motor power 1-ph 520 W
Power connector 1-ph IEC EN60320 C19
Recommended fuse 10A, 250Vac rms
Weight 48.0 kg  /  105 lb
Inlet flange NW40
Exhaust flange NW25
Noise level 57 dB(A)
Vibration at inlet flange < 4.5 mms-1   (rms)
Leak tightness (static) < 1x10-6 mbar ls-1
Operating temperature range 10 to 40 °C  /  41 to 104 °F

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