Building Industry

Rotary lobe pump meets the challenge of highly abrasive bonding primer and achieves three times longer service life

One of the products which the building materials manufacturer Knauf makes in Iphofen is a concrete primer.  

 

Background

What is intended to ensure that plaster evenly bonds onto smooth walls in construction does however create problems when filling: the plaster primer contains dispersion and has a mineral solid content of around 60 percent, which has an effect like emery paper in the rotary lobe pump feeding the filling station.  

 

Challenge

The high annual production capacity on the mixing system meant a considerable maintenance effort. "At busy times we were repairing the pump every 3 to 4 weeks," reports the Maintenance Manager of the company. Reason enough to look round for an alternative and this was found with NETZSCH.  

 

Solution

A TORNADO® T.Proc 08/45 BD-E was installed in April 2012. So as to be equipped for challenges of this kind, the whole materials concept of conventional rotary lobe pumps was reversed when the TORNADO® was redesigned: two lobes made of hardened steel are used here, which rotate in a geometrically adapted elastomer insert, instead of the standard elastomer lobes. This means energy is saved, wear is reduced and the service life of the pump is increased overall. At the time of the first inspection, the pump had already delivered double the volume of the conventional rotary lobe pump used up to this point. Only 60% of the maximum speed had been reached at this time. "So we still have a lot more potential," said an NETZSCH Expert. "Based on the operating time so far, the T2 can certainly achieve three times the service life." This supposition has now been confirmed after six months' operation: with 3-4 times the conveyance there has been more than three times the service life.

Technical Data

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NETZSCHTORNADO® T.Proc 08/45 BD-E
MediumPlaster primer
Throughput volumeBetween 1.500 and 5.000 kg/h

Products

NEMO® SY Industrial Construction in Bearing Block Design with Free Shaft Extension

The NEMO® SY Progressing Cavity Pump is used for demanding applications in every branch of industry around the globe. In bearing block design with free shaft extension, this pump can be run with any type of drive, such as servo motors, diesel motors or hydraulic drives.

NEMO® Pump BY

NEMO® BY Progressing Cavity Pumps can be used in any area of industry where a great variety of different substances must be pumped or very precisely dosed.

NEMO® C.Pro®

The NEMO® N-Ipos CY C.Pro® Dosing Pump is a fully synthetic pump for the precise dosing of a great variety of chemicals in environmental technology and the chemical industry. Its synthetic construction makes it perfectly suited for the gentle and low-pulsation conveyance and dosing of aggressive or non-aggressive chemicals.

TORNADO® Industrial Rotary Lobe Pumps T2

The TORNADO® rotary lobe pump is a positive displacement pump. The pumping action is generated by the contra-rotation of two rotors within the pump chamber which are synchronised externally. The media enters the pump chamber through the inlet port and is carried around the chamber by the rotors to the outlet port where it is discharged.


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