Oerlikon Barmag

At this year’s PU TECH, which will be taking place from 12 – 14 March 2014 in New Delhi, India, Oerlikon Barmag will be presenting components used in technologically demanding processes, such as polyurethane applications or in the dye and paints industry (hall B, stand G04).

Polyurethanes cover a broad range of applications, e. g. in the automotive industry and the wind power sector. Today, such strong and resilient components are playing an ever-greater role in an increasingly large number of applications. According to Oerlikon Barmag, the quality of these components depends on the precisely-defined mixing ratio between the various constituents during the manufacturing process. The company says its metering pumps are responsible for the precise metering of the various liquid materials in the numerous chemical processes carried out during the production of these components. They guarantee precise material flows wherever accurate metering of liquids and chemical fluids is essential to the process stability. To this end, the deviation in metering accuracy for a pump lies at ±0.15 %, says the manufacturer. In addition to the high quality of the end products, the pumps ensure that production is highly-efficient – something that is reflected in shorter product conversion times and lower waste rates.
Parallel to the proven GM series from Oerlikon Barmag, the GA range of pumps has been especially designed for conveying media with higher viscosities of up to 1,500 Pa·s as well as for temperatures of up to a maximum of 225 °C. Furthermore, it is characterised by its short flow channels and the utilisation of highly wear-resistant tool steels. With the new range of pumps, the company says it now offers tailor-made solutions for applications requiring accurately-defined, even metering.
Especially tailored to customer-specific processes, the company supplies magnetically-coupled metering pumps for high-precision metering of, for example, toxic materials in hermetically-sealed environments. Shaft seals with stuffing box, shaft sealing ring or slide ring seals are possible for standard applications as well. In addition to the design in rust- and acid-resistant, hardened steel, a wear-protection layer (DLC) for abrasive or poorly-lubricating media protects the pump and can therefore increase its lifespan.
Drum pumps – conveying and metering in a single unit
Oerlikon Barmag’s drum pump has been designed specifically for conveying and metering high-viscosity materials, such as adhesives, silicones, etc., from drums. Thorsten Wagener, the salesman responsible for industrial and chemical application pumps at the company, said: “The drum pump not only removes high-viscosity materials from the drum, it also meters the medium to the mixer head without any additional interim stops and with the customarily-high volumetric degree of efficiency. The advantage here lies in the fact that the scoop-piston pumps used to date can be dispensed with.”
High-pressure gear metering pump for chemical applications
The GM series with the round plate package has been expanded to include an option for the pressure build-up capacity especially for use in high-pressure technology with small throughputs and low viscosities. It is available in 0.05 – 20 cm2/rev feed sizes and guarantees the build-up of the required high operating pressures even at low viscosities. The improved pressure build-up capacity at low viscosities (e. g. 250 bar, 100 mPa·s) permits higher volumetric degrees of efficiency or a greater useable speed range. Hence, in addition to a cost-intensive reciprocating pump, there is now also an inexpensive and robust gear metering pump available, says Oerlikon Barmag. For manufacturers of polyurethane moulded parts, slabstock foam, refrigeration unit insulations, and sandwich panels, this means constant process stability at lower investment costs