Chemical Dosing Pump

Chemical Dosing Pump

For maximum metering accuracy and reliability

This description is given by the reciprocating movement of the displacer, in the form of a plunger or a diaphragm, which alternately increases and decreases the working space. In order to prevent return flow of the conveyed medium, the working space has to be closed by two valves.

During the backward movement of the displacer, the working space increases and a vacuum is formed relative to the pressure in front of the automatic suction valve. Due to this pressure difference, the suction valve opens and the conveyed fluid is sucked into the working space. Once the displacer reaches its rear dead-center position, the suction stroke ends. The suction valve closes by its own weight or by an additional spring load. During the forward movement of the displacer, the working space decreases. As a result, the pressure increases. When the pressure increases to slightly above the discharge pressure, the automatic discharge valve opens and the fluid volume is now discharged from the working space. In the front dead-center position, the pressure valve closes. Then the next stroke cycle begins.


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