Solving the Mystery of How our Valveless Piston Pumps Work

At Fluid Metering Inc., we’ve been on the forefront of metering pump and dispenser design for over half a century. Adding to our list of achievements is our patented CeramPump® line of valveless piston pumps represents true innovation in metering pump technology. The design is valveless because it utilizes one moving part to provide both the metering and valving functions. With a design as groundbreaking as this we get a lot of questions such as, “how does it work?” and “what makes it better than other pump technologies?” To answer these questions, we released a new video featuring a 3D animation of the metering and dosing action so customers can see exactly how our pump works and learn how it can benefit their application.

How It Works

The valveless design uses just one moving part to accomplish all fluid control tasks. It consists of a piston with simultaneous, synchronous rotating and reciprocating action. A flat is machined onto the piston, as it rotates within the flow the flat acts as the valve opening and closing the inlet and outlet ports of the pump. At the same time, the reciprocating action provides the pumping function. The metering flow rate is from 0-100% and is adjusted by setting the angle of the pump head relative to the drive. The adjustment varies the piston stroke length, and in turn, the volume pumped per stroke.

The internal components are composed of sapphire-hard ceramic which delivers a high level of dimensional stability. This means high precision dosing, extreme wear resistance, and chemically inert characteristics.

Benefits of a Valveless Pump

The unique technology of the valveless pump means that customers will receive a more accurate pump, with a longer service life, that won’t need to be recalibrated. Traditional metering systems utilize valves and many more moving parts that wear overtime, even during normal operation. This means that recalibration and system failure is a way of life. Users must keep spare parts on hand and track wear and calibration activities to ensure uninterrupted service.

Our valveless design has fewer moving parts which equal less wear, and less wear means less downtime. Because ceramic parts are more wear resistant than other materials, our pumps can last for millions of dispenses providing the same precision every time. CeramPump® metering pumps are ideal for R&D laboratory, instrumentation, industrial process, and environmental applications. To find the pump that best suits your application, visit our website or contact us directly. We also post more Fluid Metering news on our Twitter and LinkedIn pages.

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