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