Burkert Type 7800

The Type 7800 digital dosing pump is characterized by a driving principle that is completely new for dosing pumps. The drive is carried out by a microprocessor-controlled stepper motor, which is connected directly to the diaphragm by a crankshaft-and-connecting-rod drive. This means that in contrast to conventional dosing pumps, the position and the speed of the diaphragm is controlled by the microprocessor electronics during the complete discharge/suction cycle. The microprocessor-controlled compression stroke results in a dosage that is considerably more even, particularly with small dosages. The 7800 dosing pump always works with the maximum stroke length, whereby a high accuracy for the dosing over the full setting range and lower sensitivity with respect to gaseous media is achieved. Through an optimized clearance volume ratio with the full stroke length, accuracy and function are ensured, even for difficult degassing liquids. Through the anti-cavitation function, the drive is optimally adapted to the dosing of high viscosity liquids. The 7800 dosing pump can be controlled manually, by standard signals (4…20 mA), and by external pulses (e.g., open-collector). Thanks to the wide setting range of 1:1000, it is possible to realize dosing tasks from 0.002 l/h to 48.0 l/h with only 5 pump sizes.