Pressure regulator for CO2 aquarium plant fertiliser system The pressure reducer reduces the cylinder pressure from approx. 60 bar to a low 2 bar working pressure, so that the CO2 supply can be easily regulated Screw the pressure reducer onto the pressurised CO2 cylinder and regulate the amount of CO2 added at the fine needle valve The pressure reducer fits disposable CO2 cylinders (U system) and refillable cylinders (M system). By unscrewing the knurled nut (W21.8x1/14) with an Allen key, the pressure reducer fits the M10x1 thread of the disposable cylinders Very high quality design: anodised aluminium, precisely CNC milled in titanium colour. Reliable sealing washer instead of O-ring Package contents: 1 CO2 pressure reducer for refillable cylinders, with unscrewable adapter - then suitable for CO2 disposable cylinders Easy to installScrew the fitting onto the refillable or disposable CO2 cylinder. Connect the pressure reducer through a hose to a bubble counter/check valve and then to the diffuser/reactor in the aquarium. Adjust the number of CO2 bubbles on the fine needle valve. The CO2 permanent test provides feedback as to whether the amount of CO2 added is correct.Safe to useThe pressure reducer is equipped with a safety relief valve, which provides a safe release of working pressure (in case it has been set too high) without damaging the fitting. The diaphragm control of the pressure reducer guarantees absolute reliability.Tip: Can be easily converted to a disposable cylinder system by unscrewing the knurled union nut with an Allen key.Function of the pressure reducer (pressure regulator): To reduce the pressure from the pressurised gas cylinder, a pressure reducer is screwed on. It reduces the 50-60 bar cylinder pressure to a lower working pressure. This is then dosed by a small handwheel (fine needle valve) so precisely that individual CO2 bubbles can be seen and counted in the connected bubble counter. The cylinder pressure and the working pressure are indicated on pressure gauges on some pressure reducers. These displays are not strictly necessary, as - unlike with diving cylinders with compressed air - the cylinder pressure does not slowly drop, and you do not need to be warned when the cylinder is running low. Instead, the pressure remains at its maximum pressure and then drops to zero in a very short time. So, unfortunately, there is no slow decrease of the cylinder filling pressure. The working pressure would only be important if it needed to be adjusted, though this is normally not necessary. However a lot of people are happier with two pressure gauges giving them readings.
