Diaphragm pumps are used both for pumping liquids and for creating suction or pressurization in liquid systems.
Eccentric diaphragm pumps from Schwarzer Precision are driven by electric motors. An eccentric is attached to the motor shaft, which converts the rotational movement of the motor into an oscillating up and down movement of the connecting rod. This connecting rod in turn moves the diaphragm.
The downwards movement of the diaphragm creates a vacuum, which sucks the pumped medium via an inlet valve into the pump chamber. As soon as the diaphragm moves upwards again, the pumped medium is pressurized. The resulting overpressure closes the inlet valve, at the same time the outlet valve opens and the pumped medium flows out.
The diaphragm, which is circumferentially clamped, separates the pumped medium from both the motor and the ambient air, protecting the motor from the medium. This is particularly important concerning aggressive liquids. Further, the highly sealed pump head ensures that the pumped medium is not contaminated by impurities from outside.
For physical reasons, eccentric diaphragm pumps do not generate a completely uniform liquid flow. Oscillating pressure fluctuations occur, which are referred to as pulsations. For applications which do not tolerate pulsations, we successfully use two-headed pumps. The pressure fluctuations generated by the respective heads are "superimposed" in such a way that an almost pulsation-free flow is achieved.
Our pumps' highly efficient valve designs ensure a long working life, very good suction behaviour and safe handling even when liquids and gases are mixed.
Diaphragm pumps from Schwarzer Precision are extremely robust and reliable. In addition, they are completely maintainance and oil-free. Our diaphragm pumps are ideal for all applications that require a leak-free pump design.