Skip to main content

Pumping volume optimised valves (Zero-Pumping Volume)

When switching diaphragm-separated solenoid valves, the separation diaphragm creates a push-back effect, as the separation diaphragm sucks and releases volume through its movement. This pumping effect often has a negative influence on high-tech analytical instruments, such as high-precision dosing using a dispensing needle. By minimising this effect, a highly accurate dosage is possible.

Due to this optimisation, diaphragm-separated solenoid valves from the EXAKN or MTV series offer up to 100 times less pumping volume effect, than conventional diaphragm-separated valves.

Pumping volume EXAKN series

Port ON - 1 (µl) OFF - 1 (µl) ON - 2 (µl) OFF - 2 (µl) ON - 3 (µl) OFF - 3 (µl)
COM + 0,002 - 0,015 + 0,002 - 0,015 + 0,002 - 0,015
NC + 0,024 - 0,010 + 0,024 - 0,010 + 0,024 - 0,010
NO + 0,005 - 0,005 + 0,005 - 0,005 + 0,005 - 0,005