Screw Blowers

At AERZEN, we also develop bulk vehicle blowers for installation in silo trucks and tankers, with extended pressure differentials reaching up to 1.5 bar. Cement manufacturers have the option of getting cement blowers with either a three-lobe or two-lobe rotor design.

Three-Screw Design

The design with three-lobe rotors features a cylinder with cast-in, pre-inlet channels at the discharge side. This design minimises the sound thanks to its pulsation reduction and has a speed range between 1450 and 4800 1/min. However, you can install it only vertically since its flow direction is vertical.

his model seals the conveying chamber with a carbon ring labyrinth seal and the driving shaft with a radial seal ring.

Two-Screw Design

In the two-lobe rotor design:

  • There is a space that completely separates the conveying chamber from the oil sumps 
  • The operating speed ranges between 1350 and 3200 1/min
  • The drive side needs grease lubrication, while the gear side requires splash oil lubrication
  • You can position it in various ways, either upright or suspending it from the top, right, or left
  • Both vertical and horizontal flow are possible
  • Several options feature an integrated gearbox, with a speed set-up ratio of i=2,1
  • Four piston rings seal the conveying chamber in combination with oil slingers next to the vent space

The robust three-lobe blower systems present three-lobe rotors and two cast-in pre-inlet channels in their discharge-sided cylinder section, minimizing the sound through pulsation reduction. These blower systems suit a broad range of challenging applications, including the oil-free conveying and compression of gases and air.

The blower comes in 22 different sizes, from GM 3 S to GM 1080 L. The blower cylinders in the GM 3 S up to the GM 400 L models are undivided while, from the GM 430 S models onwards, the cylinders are divided horizontally. The feet at the blowers are bolted on up to the GM 80 L, while those on larger sizes are cast on.

Four piston ring labyrinths seal the conveying chambers with oil singers at every shaft end. However, you can get four radial seal ring-piston labyrinth seals on request. A radial seal ring seals the blower’s driving shaft.

Screw Blowers Delta Hybrid

Type of technology
Screw Blowers
Design
Positive pressure
Volume flow
100 to 9,000 m3/h
Medium
air
Conveying / Compression
oil-free

Screw Blower Stage Delta Hybrid D 98 V

Type of technology
Screw Blowers
Volume flow
450 to 5,400 m3/h
Medium
air , neutral gases
Conveying / Compression
oil-free