TFS Takasago Fluidic Systems

Zero-Pumping-Volume Valves

March 28, 2020

The diaphragm produces a pumping effect on a fluid as the diaphragm valve opens and closes. This is because the up-and-down movement of the diaphragm increases and decreases the volume inside the valve chamber as the valve acts. The volume of the fluid pulled in and pushed out is called the pumping volume. As some valve models pump several microliters of fluid at one time, the pumping volume forms a negative factor in metering an accurate fluid volume, and also in preventing fluid from dripping from a dispensing nozzle.

Some of the valve models we provide have remarkably small pumping volumes due to their unique internal structures or miniaturized dimensions. The EXAK series has a distinctive design called a "zero-pumping-volume structure" that allows the pumping volume to run 100 times smaller than our standard valves. Rocker valves and non-diaphragm inert valves (made of inert materials like stainless steel) have very small pumping volumes due to no volumetric change in the valve chamber during an operation. We also provide Slider Valves with pumping volumes that have been ultimately reduced to an immeasurable level.

Zero-pumping-volume Valves:

EXAK Series, EXAKN Series

Rocker Valves:

RVA Series

Non-diaphragm Valves:

UDV Series

Slider Valves:


Zero-Pumping-Volume Valves table takasago original

If you are looking for a valve with small pumping volume valves, our experienced staff will be of help to offer you the best models including customized valves to meet your requirements. Please feel free to contact us.