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6. Gear pump
The smaller the pseudoplasticity index n, the more sensitive the screw flow Q is to pressure variations ΔP.
with :
- h :
-
screw depth in the pumping zone.
For most polymers, n is of the order of 0.3, so that a 1.5% variation in pressure results in a 4.5% variation in flow.
A gear pump is capable of a more stable flow than a screw: this is why its...
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Gear pump
Static mixer
Bibliography
Software tools
Contour TM Die (EDI)
BEMflow, Boundary Element Fluid and Heat Transfer Simulation Program
Inverted preland Die (Cloeren)
Websites
Octal
Rauwendall
The Madison Group
Verbruggen...
Standards and norms
- Management environnemental. Exigences et lignes directrices pour son utilisation. - ISO 14000 - Nov. 2004
- Food safety management systems – Requirements for all organisms in the food chain. - NF EN ISO 22000 - Oct. 2005
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Manufacturers – suppliers (non-exhaustive list)
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Statistical and economic data
Figure 1 compares the performance of two equivalent systems in terms of instantaneous available flow:
1 production unit, 1,300 kg/h, investment value €1.5 M ;
2 production units...
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