Eccentric Diaphragm Pumps

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.

Customising is our standard: all pumps can be adapted exactly to your specific requirements. And that within only a few days. Our modular system allows you to choose from a variety of components and materials.
 

Connections:

Conical fittings, internal threads and manifold connections with free choice of outlet direction.
 

Valves:

Various types, resistant materials, as well as pressure or vacuum optimized versions are available.
 

Diaphragm:

Various types and resistant materials available.
 

Eccentric and connecting rods:

Connecting rods available in different lengths. Stroke selectable. Eccentric bearing as desired.
 

Motor:

Iron core, coreless, shaded pole and brushless motors available. Operating voltage and individual wiring as desired.
 

Pump housing:

With individual mounting options and freely selectable installation positions.
 

In addition to adjusting the hydraulic performance, diaphragm pumps should always be adapted to their specific application regarding required working life. The working life of a diaphragm pump depends to a large extent on the motor used, which in turn has a strong influence on the costs of the pump. In applications with intermittent duty cycles, the pumps are sometimes only used for a few minutes each day. In such cases, inexpensive iron core motors offer an optimal cost-benefit ratio. Particularly high-quality motors ( e.g. coreless and BLDC motors) are available for applications requiring continuous pump operation

We also adapt the plastics and elastomers used to the desired application and the required working life of the pump. Our modular system allows you to choose from a variety of materials. In this way, we can quickly and easily provide pumps for complex applications and very special environments (e.g. pumping aggressive liquids).