How is the connecting rod of a plunger metering pump typically used?

The connecting rod of a plunger metering pump is primarily used to transfer the motion from the motor to the plunger, allowing for the precise control of the plunger's stroke. By doing so, it directly determines the length of the plunger's stroke. The stroke length is crucial because it affects the volume of fluid being displaced with each cycle, which is essential for the metering application. As the plunger moves back and forth, the connecting rod helps maintain a consistent stroke length, ensuring accurate and repeatable dosing of the fluid.

Measuring the stroke length is critical for maintaining the accuracy of the pump, which is why understanding the role of the connecting rod is essential for anyone working with or designing plunger metering pumps. This function distinguishes it from aspects related to flow rate regulation or motor speed control, as these functions are typically managed by different components or systems in the pump design.