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Type 7800 data sheet | Digital dosing pump for continuous dosing
Christian Bürkert GmbH & Co. KG
The Type 7800 digital dosing pump is characterised
by a drive 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 a lower sensitivity with respect to gaseous
media is achieved. Through an optimised clearance
volume ratio with the full stroke length,
the accuracy and function is ensured, even for
difficult degassing liquids. Through the anticavitation
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 realise dosing tasks from 0.002
l/h to 48.0 l/h with only 5 pump sizes.
Bürkert
burkert
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