Rototec AG – Pumpen, Verschleisstechnik und Revisionen

RotoTwin Screw Pump

For the foodstuffs, pharmaceutical, cosmetics and chemical industries

Pathogens don't stand a chance! In order to meet the stringent requirements of the foodstuffs industry, companies working in this sector needequipment such as the RotoTwin® screw pump which was designed to meet the strict EHEDG hygiene requirements.
Two intermeshing rotating feed screws reliably convey products with high to low viscosity as well as gaseous or volatile products. Due to the axial movement and low acceleration the RotoTwin® never fails to impress with its powerful suction capability and gentle product delivery. The contactless operation of thefeed screws makes the pump safe even when running dry. Even major air bubbles in the pipe will not harm the pump. The pump's ability to reverse the direction of rotation enables the medium to be pumped in both directions, making it possible to use the pump for filling or emptying.

TECHNICAL HIGHLIGHTS

  • Max. output 200 m³/h
  • Max. temperature +130 °C
  • Max. pressure difference of 30 bar
  • Viscosity up to 1'000'000 mPas
  • Powerful suction capability
  • Reversible direction of flow
  • Wide viscosity range
  • 60 % gas content possible
  • Low pulsation
  • Safe dry running

OPTIMAL DELIVERY

POWERFUL SUCTION CAPABILITY
The axial delivery and the low acceleration of the product in the pump provide excellent NPSHR values < 2 m.

  • For emptying tanks
  • For low suction line height to the pump
  • For conveying viscous products or products with low boiling points

REVERSIBLE DELIVERY DIRECTION
Delivery in both directions by reversal of direction of rotation.

  • For delivery and subsequent emptying of the pipework
  • For use as a filling and emptying pump

WIDE VISCOSITY RANGE
Viscosities of up to 1'000'000 mPas are possible through the axial delivery and low kneading action in the product. Good delivery performance from the high rotational speed even at low viscosities of 0.5 mPas.

  • Delivery of all low to high viscosity products
  • Delivery of an extremely broad range of products from just one pump

60 % GAS CONTENT POSSIBLE
The high rotational speed enables even compressible products to be delivered.

  • For delivery and subsequent emptying of the pipework by suction
  • For use as a filling and emptying pump

LOW PULSATION
The axial delivery and the low acceleration of the product in the pump ensure a low pulsation level. Any pulsation which occurs is rapidlydispelled by the high rotational speed.

  • Minimal shear forces maintain the structure and appearance of the products
  • Ensures gentle conveyance of sensitive media
  • The pumped distance can be extended by pumps working in tandem
  • For applications where high quantity accuracy is needed

SAFE DRY RUNNING
The contactless operation of the feed screws and a flushed/blocked axial face seal make the pump safe if it runs dry.

  • The pump continues to work even with a high proportion of gas in the pipework