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CE 320: Stirring

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Stirring

Stirring Stirring Stirring

Product Details


Technical Description
During stirring, the continuous phase is liquid. With CE 320, the production of solutions (solid dissolved in liquid), emulsions (mixture of non-inter-soluble liquids) and suspensions (insoluble solid in liquid) can be investigated.
Mixing takes place in a tank which is resistant to chemicals and heat-resistant. With the high-performance stirring machine even high-viscosity mixtures can be produced. The speed is adjustable. The torque is indicated on the unit’s digital display. This enables the power demand to be determined.
9 different, easily interchangeable stirrers are provided. With a plastic which is dispersed in the water it is possible to observe the characteristic flow fields of the different stirrer types. Flow impeders can be inserted in the tank to investigate their influence on the mixing process. To determine the mixing time and mix quality of solutions, a conductivity meter is available. The device can also be used to measure temperatures.
A removable tube coil serves as a heat transfer medium. It can be used for heating or cooling with water from the laboratory supply. A valve with precise adjustment is used to adjust the flow rate. This enables the influence of mixing processes on heat transfer to be investigated.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments
- Flow fields of various stirrer types
- Power demand, mixing time, mix quality dependent on
  + stirrer type
  + speed
  + materials used (density, viscosity)
  + insertion of flow impeders
- Observation of the suspension state of suspended solids when using different stirrers and at different speeds
- Observation of the droplet size of emulsions when using different stirrers and at different speeds
- Influence of mixing processes on heat transfer

Features
* Visualisation of flow fields when using various stirrer types
* High-performance stirrer with speed control
* Determination of mixing time of solutions
* Mixing of emulsions and suspensions
* Influence of mixing processes on heat transfer
* Power demand during stirring
Specification
[1] Investigation of mixing processes during stirring
[2] Transparent stirred tank with 4 removable flow impeders
[3] Speed-controlled agitator with digital torque indicator
[4] 9 interchangeable stirrers:
axial-, radial-, tangential-conveying
[5] Removable tube coil for cooling or heating with external water supply
[6] Portable device for measuring conductivity and temperature

Technical Data
Stirred tank
- capacity: approx. 20L
- material: DURAN glass and PVDF (base)
Stirring machine
- speed: 50...2000rpm
- max. power output on shaft: 105W
Stirrers
- 5 propeller stirring heads
  2x 3 blades, D=70mm / 100mm
  1x 4 blades, D=70mm
  2x 2 blades (angled), D=70mm / 100mm
- 3 paddle stirring heads
  2x paddle: 70x70mm with 3 / 6 holes
  1x paddle: 70x100mm with 10 holes
- 1 turbine stirrer with shaft: D=50mm
Tube coil
- diameter: approx. 140mm
- material: stainless steel
Measuring ranges
- conductivity: 0...200mS/cm
- temperature: 0...85°C
- speed: 50...2000rpm

Dimensions and Weight
l x w x h : 850 x 600 x 1600 mm
Weight : approx. 100 kg

Connections
230V, 50/60Hz, 1 phase or
120V, 50/60Hz, 1 phase
Water connection for tube coil: 200...300L/h

Scope of Delivery
1 experimental unit, 8 different stirring heads, 1 threaded shaft, 1 turbine stirrer, 1 conductivity meter in case, 1 Allen key ,1 set of instructional material

Order Details
083.32000  CE 320  Stirring

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
E-Mail:
info@selkagmbh.com   |  Internet: http://www.selkagmbh.com

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