Member postings for Vagulus

My thanks to all of you. Your input has crystalised my thinking - and I have been barking up the wrong tree.

I have been confusing where I am now (at the experimental stage) with where I want to be (the testing stage). I should be able to use the TIG flow valve to measure the flow needed to make the thing work. Then I can get into designing the double-acting bellows pump I have in mind to give me the right amount of air. Clive is right - I'll let the pressure sort itself out.

I think I know where I am going now.

Much appreciated.

More good thinking.

Thanks

I can't really tell you what the beasty I am prototyping is or does. All I can say is that the air has to blow bubbles at the bottom of a water tank one metre deep. That actually means an operating pressure of 0.1 Bar. I have been saying 0.5 Bar to be on the safe side.

Does XD 351 hint at another Australian?

Good thinking. I actually tried a TIG flow meter but they require minimum OP of 0.35 MPa (3.5 Bar) and I want to work below that. I'll try my art supply shop. They should know something about airbrushing.

Thanks

My project is driven by low pressure air (about 0.5 Bar). In fact its supply is from an air pump rather than a compressor.

Does anyone know where I can obtain a flow meter (0 - 30 l/min) and a relief valve which will operate at that pressure?

Thanks