The new generation 5 piston diaphragm pumps of the series R 510.1 and R 511.1 deliver 65 l/h to 1900 l/h at pressures up to 220 bar with improved accuracy and ease of use. The operating range for the 510.1 is 65-1300 l/h at up to 200 bar and for the series 511.1 from 100-1900 l/h at up to 220 bar. These new piston diaphragm pumps qualify for a wide range of applications including the chemical industry with various combinations that make them suitable for many applications.

The newly designed stroke mechanism is the basis for this performance and incorporates variable eccentric drive design, which gives the following benefits:

* It enables a linear and precise stroke length setting and thus very precise metering even with large flow rates and high pressures.

* Due to the harmonic movement sequence even for partial stroke operation, these pumps produce significantly less pulsation than other metering pumps.

* As a result, the wear and the complexity for pulsation damping are minimised.

* Noise emission in comparison with simpler stroke mechanisms, particularly in the high flow rate and pressure range, is significantly reduced.