What type of pumps are most metering pumps classified as?

Metering pumps are primarily designed to accurately dispense a specific volume of liquid, often in applications that require precise flow rates. They are most commonly classified as reciprocating pumps because of their mechanism of operation. Reciprocating pumps work by utilizing a piston or diaphragm that moves back and forth within a cylinder, allowing them to draw in the fluid on one stroke and discharge it on the next.

This design is essential for metering applications, as it ensures a consistent and controlled flow of the liquid being pumped. The precise movements of the reciprocating action allow metering pumps to handle a wide range of fluid types and viscosities while still maintaining accuracy, which is a critical requirement in many industrial processes.

While diaphragm and rotary pumps can also be used for similar applications, they represent specific designs that do not generally align with the primary classification of metering pumps. Diaphragm pumps can function as metering devices, but they are a subset of the more general category of reciprocating pumps, which encompasses a broader range of devices recognized for their dependable volumetric delivery.