Witt, with US headquarters located in Georgia, now offers the PMV Precision Metering Valve. The valve is designed to meter very small gas flow rates down to 30ml/min. The precise flow adjustments can be made in the pressure range up to 20 bar using a rotary knob, and its spindle with 14 full rotations is generously sized to allow very fine flow gradations, according to the company.
A digital knob with 1499 divisions and a locking ring is an alternative option, which aims to allow any target value to be set rapidly, precisely and with high repeatability. Witt can also supply the valve as a valve cartridge for installing in machines and other apparatus. All commercially available gas types can be used – including hydrogen and oxygen.