Instruction Handbook KL
Chapter 2
BA KL V11 en 10/2014 page 2-3
2.3 General Description
WANGEN helical progressing cavity pumps are rotating displacement pumps for delivering low to high
viscosity media.
The pump elements proper comprise a rotor made of steel materials and a stator made of elastomer
materials. The rotation of the rotor within the stator causes the delivery chambers to be opened and
closed in a continuous sequence. This causes the medium to be delivered continuously from the
inlet/suction end through to the pressure end.
The special delivery principle of these pumps enables low pulsation and a delivery, which is
approximately proportional to pump speed. A correct dimensioning of the pump is decisive for perfect
functionality. The pump will be customized by the manufacturer in line with the details specified by the
customer regarding the medium to be pumped.
Pumps for use in the foodstuffs and beverage industry are designed and built to the recommendations
of DIN EN 1672-2 ‘Food processing machinery - Basic concepts’. This does not include pipe
connections, which require special cleaning procedures. These must be cleaned manually by the
operator. The cleaning cycle is dependent on the food and the relevant hazard from. This is set by the
operator. Correspond to the pipe connections according to DIN 11864, according to DIN EN 1672-2
there is no health risk. The operator does not define any special cleaning measures.
Non-corroding materials suitable for cleaning and/or disinfection are being used for the product-
contacting parts of these pumps. Elastomer materials and seals correspond to the BfR (German
Federal Institute for Risk Assessment) recommendations and the FDA guidelines respectively (US
Food and Drug Administration) and the Regulation (EC) No 1935/2004.
WANGEN pumps or pump assemblies are designed and constructed to comply with all health and
safety requirements of the EC Machine Directive. When compliance with all requirements has been
shown, each machine will be certified by an EC Declaration of Conformity (including CE marking) or a
Declaration for partly completed machines (if the machine is not yet ready to be used).
The declaration of conformity issued by Pumpenfabrik Wangen applies to the supplied
machine in connection with the use, according to regulations, of the drive (helical geared
motor, helical gear to be assembled to an IEC standard motor) as described in the data sheet
with defined power and defined torque as prime mover of the pump. Subsequent
interventions or changes made on the pump are subject to the sole responsibility of the
customer who, in this event, becomes liable for warranting the conformity with the EC
regulations.
2.4 Distinctive features of hopper pumps
Mediums without flow ability demand a feeding device to the rotor / stator system to assure a
sufficient filling of the pump chamber. It is realized through a feed screw, which is mounted on the
cardan shaft. Instead of a suction housing as a pick-up for the material to be conveyed, a hopper
feed casing with added tunnel is used. There is a large rectangular opening in the hopper feed
casing which picks up the mainly as filling occurring material. In the conic / cylindrical designed
tunnel, a supply pressure in interplay with the feed screw is build up, which supports the filling of the
pump chamber.
2.5 Noise Emissions
Each pump will be manufactured and tested according to the currently applicable technical
documentation. The A-evaluated permanent noise level will normally be < 70 dB (A).
This does not include the drive unit and pipe system.
It is also assumed that the pump operates without cavitation, and that the pump unit is properly
mounted on a level concrete plate or steel construction resistant to torsion flexing.
To Next Page
Loading...
Need help?
General
