- The limit of applications of transfer gear pumps has been reached when the transfer medium does not have the required lubricity for a proper function of the pump and a high working pressure is needed at the same time
- Such problematic fluids are for example silicates (sodium silicate), isocyanates and polyols with hard fillers as can be found in the PUR-technology
- Under air or humidity influence, crystallisation of these fluids occurs and agrivates the lack of lubricity
- The gear (gear wheel and shafts) is surrounded by SIC bearing bush
- The gear is high-rigid protected against wear taken the requirements regarding material, heat treatment, surface geometry into consideration when using this coating technology
- Depending on the medium to be transferred, working pressures up to 150 bar are possible with driving speeds of about 1500 1/min
- Solid body parts with a size < 50 μm and a hardness acc. to Vickers < 2500 will be accepted in the transfer medium
- The main field of application for the DuroTec® pumps DT are mainly multi-component-systems in the PUR-technology
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