Behind the Scenes: The Technology of the Valveless Metering Pump

The valveless, ceramic, piston metering pump. This patented technology has been the heart and soul of our company, Fluid Metering, Inc., for over fifty years, and continues to be the focus of our business. Originally created for more accurate fluid transfer, discrete dispensing, and fluid sampling, the valveless pump differentiates itself from other pump solutions, such as conventional piston, diaphragm, and syringe pumps. How so? The unique technology behind the pump.Valveless technology

Unlike conventional pump technologies, which rely on either internal or external valves to ensure unidirectional fluid flow, the valveless metering pump only uses one moving part—a rotating, reciprocating ceramic piston to accomplish both the pumping and valving functions. In the case of conventional pumps, valves need to be maintained on a consistent basis, and in some cases, completely replaced if not properly working. Having a pump that doesn’t have valves not only cuts down on recalibration, but also reduces downtime since the pump doesn’t need to be taken out of a process in order to be maintained or fixed. Why ceramic materials? Ceramic is wear resistant and chemically inert, which helps with the functionality and accuracy of fluid metering. By using sapphire-hard, dimensionally-stable internal components in a pump, 0.5 % precision for millions of cycles is maintained without maintenance or recalibration. With increased accuracy, you are also receiving more bang for your buck—as fluid concentrations and volumes are increasing, the importance of precise dispensing increases as well.

How does this technology work? Simply put, the valveless pumping function is accomplished by the synchronous rotation and reciprocation of the ceramic piston in the precisely-mated ceramic cylinder liner. One complete piston revolution is required for each suction and discharge cycle. As the makers of this technology, we can’t stress enough how paramount the valveless pump is to so many applications—why not use the more accurate technology?