Polyurethane has become an integral part of our daily lives, whether in the construction industry, in leisure activities, in the manufacture of furniture, or in numerous other applications. The precision gear pumps from Oerlikon Barmag, which will be presented at this year’s UTECH Asia / PU China 2024 in Shanghai (booth 230), impress with customized solutions for demanding tasks in the chemical industry. They increase the productivity of the often complex manufacturing processes for this wide range of applications.
Components for all cases
Oerlikon Barmag pumps reliably handle demanding processes in PUR applications, in the chemical, plastics, or paint and lacquer industries. One of the greatest challenges lies in the highly accurate and reliable metering of toxic or low-viscosity media. With the GM and GA series and the associated components, Oerlikon Barmag presents the optimum equipment for these applications. “The magnetic couplings used specifically in the GM series fulfill the expectations of the manufacturing industry with their low maintenance requirements. In addition, they meet the high safety standards of the chemical industry, e.g. for compliance with clean air (“TA-Luft”) regulations,” explains Andreas Heitzer, Sales Director of the Pumps business unit at Oerlikon Barmag. “If personal maintenance of a standard sealing is not possible or only possible to a limited extent due to a critical medium, magnetic couplings are the method of choice,” he continues. If the product chamber of the pump must be sealed airtight to prevent undesirable reactions, magnetic couplings are used. Magnetic couplings are also used in vacuum processes. They also improve the suction behavior of the pump.
GM pump – a series for different operating conditions
Pumps in the GM series achieve precise dosing by feeding the flow with low pulsation. The multi-stage GM pump conveys low-viscosity media even under high pressure and the most difficult operating conditions (e.g. 250 bar, 100 mPas). The standard pump for many dosing tasks is the GM series in a square design. With the development of the multi-stage pump, the range of applications for the GM series has been significantly expanded. The round 2-stage GM pump has been specially developed for use in high-pressure technology. It fulfills the special challenge of pumping small flow rates with low viscosities. The pump serves flow rates from 0.05 to 20 ccm/rev and is therefore particularly suitable for the production of PUR molded parts, block foam, refrigeration unit insulation or sandwich panels.
GA series for higher viscosity media
Making products and processes more efficient is a constant challenge for manufacturing companies. This is why Oerlikon Barmag has added the GA series to the GM series, especially because of the demand for conveying high-viscosity media. The GA series is available in delivery volumes of 1.25 – 30 cm³/rev (0.6-144 l/h). It is designed for pressures up to 200 bar, for viscosities up to 1,500 Pas, and for temperatures up to a maximum of 225°C. With this pump series, Oerlikon Barmag offers customized solutions for process engineering processes where highly accurate and uniform metering is required.
For highly viscous media – the drum pump
The drum pump from Oerlikon Barmag is specially designed for conveying and dosing highly viscous materials such as adhesives, silicones and other highly viscous materials from drums and other large containers and for pressures of up to 250 bar. One of its special features is not only that it discharges highly viscous materials from the drum, but also that the medium can be dosed directly without an intermediate stop.
The gear pump and drum follower plate are synchronized so that the plate effortlessly reaches the bottom of the container, leaving behind only a very small residual quantity of < 1%. This reduces material costs and has a positive effect on the production process.
