The Series 5A precision metering valves regulate even the smallest flow rate with high precision. Worth mentioning is the exact, linear flow rate characteristic. Different spindle types, precisely matched to the media and the flow range, make numerous applications possible. Additional safety and reliability are achieved by means of the spindle thread outside the media flow. The precision metering valve is available in the materials PP, PVDF and PTFE and is suitable for the usage of aggressive media. Various types are available: the manually operated precision metering valve Series 5A is available with and without adjustment scale. At constant pressure and/or constant density, the adjustment scale enables liquid or gaseous flows to be exactly and reproducibly adjusted. Even more variable are the precision metering valves with electrical actuator Series 5E. The actuator can be opened and closed, stopped at any intermediate position and then opened or closed further – precise and reproducible for the specific application.