No heat build-up
The extremely compact proportional valve VEMP requires very little power at 1 mW: it maintains its current operating status even when de-energised, while very little power is required to change the flow rate. This means that there is no heat generation. At 20g it is very lightweight and thus ideally suited for use in mobile devices such as portable oxygen therapy units.
The VEMP enables extremely precise proportional control of gas flow rates from 0 to 30 l/min, as well as pressure. With a switching speed of 15 ms, it can react very quickly to setpoint changes. It is ideal for oxygen/ventilation therapy, medical mattresses, ophthalmology and dialysis. The flow setpoint can be set using a DC voltage, which means that no pulse-width modulated signal is required for control.
The piezo technology uses a completely different mechanical system to solenoid valves, and is quiet in operation.