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EH mechanical booster pumps
MB mechanical booster pumps
BOC Edwards Stokes Vacuum booster pumps
HV mechanical booster pumps |
The EH mechanical booster pumps, based on the simple Roots principle, remain the favorite pumps 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. These pumps must always be backed by
another pump which can deliver against a high pressure differential to atmospheric pressure.
Operating at relatively low pressures, the mechanical booster pump is not exposed to the same concentrations of corrosive process media as is the backing pump, which makes it highly reliable.
High performance pumping mechanism
The EH has a high quality, oil-free pumping mechanism. This offers:
• Quiet, vibration free operation
• Rugged and corrosion resistant
• Advanced shaft-seal technology - no oil contamination of 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 performancein 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.
EH pumps with hydrokinetic drive
EH booster pumps have a unique and patented hydrokinetic fluid drive, which couples the motor to the pumping mechanism. The hydrokinetic drive offers the following advantages:
• Pump down times cut by up to 50%
• Reduced capital and operating costs
• No pressure sensors, by-pass lines or valves
• Can operate continuously at all pressures - when used with a backing pump |
