EH250C

Explosion proof mechanical booster pumps are certified for use within potentially explosive atmospheres.

The EH250C mechanical booster pump has been certified for use in CSA Division 1 area Gas Class I Group C D and Dust Class II Group F G, Temperature Class T3C. The temperature classification of the 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.

Explosion proof mechanical booster pumps may be supplied with explosion proof motors individually or part of an explosion proof system. Please consult Edwards.

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.

Applications

• 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

*Weight refers to IND version