11 - Stirring and Dispersing - HiTec Zang GmbH
11 - Stirring and Dispersing - HiTec Zang GmbH
11 - Stirring and Dispersing - HiTec Zang GmbH
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12<br />
<strong>Stirring</strong> <strong>and</strong> <strong>Dispersing</strong><br />
Stirrer type Recommended Application Speed Range Principal Viscosity Limit Diameter Ratio<br />
approx. rpm** Current approx. mPas (cSt) D/d<br />
Cross-arm stirrer Shea flows in several<br />
fields, medium viscous<br />
liquids, good exchange of<br />
heat<br />
400 ... 800 tangential 10,000 1.1 ... 2<br />
Slanted blade good axial mixing effect , 500 ... 2500 radial 1,000 2.5 ... 3.5<br />
stirrer<br />
shear flow, prevention of<br />
layer build-up<br />
Grating stirrer Medium viscosity, strong<br />
shear flow, good<br />
exchange of heat<br />
200 ... 700 tangential 5,000 1.4 ... 2<br />
Paddle stirrer Low rotation speed, strong 20 ... 100<br />
shear flow, very sparing at<br />
low rotation speeds<br />
tangential 100 1.5 ...3<br />
Helical ribbon Powerful shear flow, for 50 ... 200 axial 50,000 1.1 ... 1.5<br />
stirrer<br />
high-viscous liquids,<br />
suspensions, pastes<br />
**with D of approx. 20 cm<br />
The stated values do strongly vary within literature<br />
by more than one order of magnitude <strong>and</strong> are used<br />
for a first orientation. Our project department will<br />
gladly help you to find a suitable stirrer-drive.<br />
To help you, we require the following information<br />
Order Code Description<br />
IR-RBL-rt-rd-ws-wl-wd Stirrer blade<br />
rt = stirrer type:<br />
AN Anchor stirrer<br />
PR Propeller stirrer<br />
SC Plane or turbo stirrer<br />
IP Impeller stirrer<br />
MI MIG-stirrer<br />
ZA Toothed disc stirrer<br />
TU Turbine stirrer<br />
KR Cross arm stirrer<br />
ST Slant blade stirrer<br />
GI Grating stirrer<br />
BL Paddle stirrer<br />
SP Spiral stirrer<br />
rd = blade diameter in mm (d)<br />
ws = material:<br />
ES Stainless steel<br />
EG Glass coated stainless steel<br />
GL Glass<br />
wl = shaft length<br />
wd = shaft diameter<br />
Ordering example:<br />
Anchor stirrer of glass, diameter 15 cm, shaft<br />
diameter 10 mm, shaft length 30cm<br />
Order code: IR-RBL-AN-150-GL-300-10<br />
from you:<br />
Stirrer type used, rotation speed, viscosity (or<br />
comparative information like water, motor oil,<br />
honey ...), mixing pot D, used stirrer D.<br />
Projecting Aide:<br />
Estimation of Viscosity<br />
Material Viscosity in mPas<br />
approx. at 20 ° C<br />
Acetone 0.33<br />
Alcohol 0.6<br />
Benzene 0.65<br />
Water 1<br />
Liqueur 3<br />
Condensed milk 7,5% 12<br />
Condensed milk 10% 45<br />
Olive oil 80<br />
Edible oil 85<br />
Apple juice concentrate 300<br />
Egg liqueur 600<br />
Yogurt 900<br />
Glycerine 1,500<br />
Honey 2,000-10,000<br />
Mustard <strong>11</strong>,000<br />
Print colours 100,000 – 100 Mill.<br />
30 Years of Excellence in Lab Scale Technology · Over 1.000 Products around the Laboratory Reactor
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