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The mechanism of operation of these pumps is such that it allows to control the volume of pump outputs during pumping. The amount of pump flow control varies depending on the mechanism of operation. Recirculating pumps in piston and diaphragm types, rotary pumps in spiral and hose types are among the most used in the industry.
Volume control in reciprocating pumps (piston and diaphragm) is accomplished in two ways, by controlling the piston or diaphragm rotation rate or the frequency of their rotation (pulse rate), while in rotary pumps the volume control is performed. It is possible to control the pump rotation speed.
Course length control in mechanical reciprocating pumps is accomplished by controlling the diagonal of the rod connected to the diaphragm or piston by means of a cam mounted in the gearbox. These pumps are usually controlled manually using the Vernier ruler to adjust the course length. This is why converting these pumps into electronic methods for connecting to intelligent control and remote control systems will be very expensive.
In solenoid reciprocating pumps, the pump output volume is regulated by the number of beats controlled by the electronic system. This mechanism is suitable for low capacity pumps.
In rotary pumps, the basis of pump control is its rotational speed, which can be achieved by using manual variable gearboxes or electronic remote control systems such as frequency inverters or servo motors. . Unlike reciprocating pumps, electronic remote control methods in these pumps (due to the development of these systems) are very economical.
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