90061bmhr - 61B MHR (Bare shaft) Horizontal flow

61B MHR (Bare shaft) Horizontal flow



Edwards Superblowers are designed to be used in conjunction with rotary-piston, liquid ring, rotary vane and dry vacuum pumps to increase pumping speed at working pressures and shorten pump down time significantly. The Superblower can be mounted separately or on the inlet of the backing pump to create a compact integrated package.

Featuring an extra large diameter shaft, the 6” Superblower has the capability for use with higher powered motors in addition to ensuring a uniquely rugged and durable mechanical booster. This allows the pumps to operate at their full displacement from atmospheric pressure with an appropriately sized backing pump.

In addition, the 61B Superblower is available with bypass technology which further enhances your productivity while also assuring consistent, reproducible vacuum processing. The bypass valve limits the maximum differential pressure, enabling the booster to start from atmosphere and provide increased pumping capacity over the full pressure range. Eliminating the electrical pressure switch insures continuous booster operation regardless of vacuum level.

The Superblower must be backed by a primary vacuum pump designed to discharge to atmospheric pressure. Examples of suitable backing pumps are listed below:

GV Drystar or Chemical Drystar dry pumps
Two stage LR series liquid ring pumps
RV, EM or EVC oil sealed pumps
Microvac series piston pumps

The bare shaft Superblower should be connected to a suitable V belt or direct drive motor. Contact Edwards for advice.


  • Automotive
  • Chemical processing
  • Heat treatment
  • Leak detection
  • Metallurgy
  • PET processing
  • Pharmaceuticals
  • Thermal processing
  • Transformer drying and cable fluid conditioning
  • Vacuum coating
  • Vacuum melting
  • Many other industrial applications

Features and Benefits

  • Mechanical shaft seal offers improved life and serviceability
  • Ringfeder® keyless gear locking system provides stronger, faster timing
  • Drive end roller bearing which resists belt pull and thermal effects
  • Over-sized anti-friction bearings allows increased uptime and longer service intervals
  • Horizontal gas flow configuration
  • Belt drive or Direct drive capability
  • Rugged proven design and construction
  • Large shaft diameters allowing improved performance at high pressures
  • Quiet operation
  • Unique impeller design which is dynamically balanced to minimize vibration
  • High volumetric efficiency
  • High differential pressure offering operation capability
  • Bypass technology to increase pumping capacity

Technical Data

Horizontal flow Vertical flow
Displacement V belt (2750 rpm) 3375m3h-1 / 2000ft3min-1 3375m3h-1 / 2000ft3min-1
Displacement direct drive (1800 rpm) 2210m3h-1 / 1300ft3min-1 2210m3h-1 / 1300ft3min-1
Displacement direct drive (3000 rpm) 3685m3h-1 / 2170ft3min-1 3685m3h-1 / 2170ft3min-1
Displacement direct drive (3600 rpm) 4420m3h-1 / 2600ft3min-1 4420m3h-1 / 2600ft3min-1
Inlet/outlet flanges 8” ASA/ANSI flange 8” ASA/ANSI flange
Motor option US TEFC 10hp 10hp
By-pass available Yes Yes
Oil capacity 1.9liter / 0.51gal 4.1liter / 1.1gal
Max temp rise 135°C / 275°F 135°C / 275°F
Max discharge temp 191°C / 375°F 191°C / 375°F
Foot print TEFC direct drive (L x W x H) 1524 x 543 x 757mm / 60 x 21.4 x 29.8in 1524 x 757 x 543mm / 60 x 29.8 x 21.4in
Weight TEFC direct drive 530kg / 1170lbs 530kg / 1170lbs

Dimensions 2

A 8" pipe flange connection 13 1/2" (343 mm) OD x  8” (203 mm) ID 8 x 3/4-10 NC-2B x 1 1/8" (29 mm) holes straddle both CL both flanges