The EH4200T160 mechanical booster pump has been certified for use in EX II 2G c IIB T160 classified areas. The temperature classification of the mechanical booster pump is based on the outlet pressure of the pump being maintained below the critical backing pressure of 10 mbar (1 x 103 Pa) at zero flow.

Features and Benefits

  • Suitable for applications where high pumping speeds over 3000 m3h-1/1776 ft3min-1 are required in the pressure region of 0.01 to 50 mbar/0.0075 to 37.5 Torr.
  • Operating at relatively low pressures makes it highly reliable.
  • The EH pumps have a high quality, oil-free pumping mechanism. This offers:
    • Quiet, vibration free operation.
    • ­Rugged and corrosion resistant.
    • ­Advanced shaft-seal technology with no oil contamination of the process chamber
  • The corrosion resistant pumping mechanism is manufactured from high grade cast iron.
  • The proven shaft-seal arrangement ensures that no oil enters the pumping stator, and the absence of internal and external by-pass lines and valves which may corrode or stick minimizes maintenance requirements.
  • The design of the shaft seals is optimized to ensure that no lubricants can migrate into the pumping mechanism. This maintains booster pump performance in applications which demand the highest standard of cleanliness. In addition, this prevents the build-up of trapped particles on the rotor lobes and end-faces which have very close tolerances.
  • The dynamically balanced rotors and precision ground gears contribute to the smooth, quiet operation of the pumps, as demanded by manufacturers of advanced technology equipment.


  • Semiconductor processing
  • Vacuum distillation
  • Vacuum packaging
  • Steel de-gassing
  • Thin film coating
  • Vacuum metallurgy
  • Low density wind tunnels
  • Space simulation
  • Vacuum impregnation
  • Oil drying and de-gassing
  • Pharmaceutical freeze drying
  • CO2 lasers
Technical data  
Displacement (swept volume)  
50Hz 4140 m3h-1 / 2440 ft3min-1
60Hz 4985 m3h-1 / 2935 ft3min-1
Effective pumping speed with backing pump  
E2M275 3100 m3h-1 / 1825 ft3min-1
Pressure differential across pump  
50Hz 0-70 mbar / 0-52 Torr
60Hz 0-50 mbar / 0-38 Torr
Inlet connection ISO250
Outlet connection ISO100
Rotational speed  
50Hz 0-2900 rpm
60Hz 0-3500 rpm
Operating continuous inlet pressure 0-1000 mbar / 0-760 Torr
Maximum outlet pressure 1000 mbar / 760 Torr
Recommended backing pumps GXS450, E2M275
Electrical supply  
50Hz 220-240V / 380-415V
60Hz 230V / 460V
Motor power  
Hydrocarbon 11kW / 15hp
PFPE 11kW / 15hp
Explosion proof 15hp
Ambient temperature range  
Operating 5 to 40°C / 40 to 104°F
Storage -10 to 80°C / 14 to 176°F
Maximum operating humidity 90% RH
Recommended cooling water supply pressure 2-6 bar
Cooling water connections 3/8 inch BSP male
Recommended oil  
Standard version Ultragrade 20
PFPE version Fomblin® YVAC 16/6
Oil capacity  
Gear case 3.5 litre
Coupling cover 6.5 litre
Shaft seal reservoir 1.5 litre
Weight 481 kg