Multiport Valve Selector

Interesting. Another way could be miniature solenoid valves on a manifold. Would even manual valves be possible?

Pages 6 and 7 may give you some ideas.

Manifold Sampling Valve IOM SPD 5.5.6 - Sentry Equipment

This seems to be just a series of valves and tubes plumbed into a single manifold.

Nothing difficult at all.

Hi nacimroc,

Try www.drallim.com they make a range of multi ported rotary selector valves,

Best of luck,

John

http://www.swagelok.com/downloads/WebCatalogs/EN/MS-02-326.pdf

This Swagelok product will tell you which pipes are closed electronically and is suited for selecting different sample ports to send to an analyzer.

Could you give an indication of flow rate and pressure of the gas lines. Are they all the same pressure and flow rate?

If you do not require the high pressure of chromatography valves, your options increase and the prices reduce.

Thanks for suggestions folks. Didn't expect much of a response so I apologise I was shy on details. It is very low pressure, mostly negative pressure, about -10 to +10 mbar average. Pipe is in suction until valve opens and pump sucks gas through.

It will most probably operate under battery power with a solar panel so I kind of moved away from solenoids because of their constant power requirement to keep them open but a switching one or very low power would be fine.

Flow is about 0.5 litres/min so very low again.

Ok, I've been looking up small solenoids/valves. I don't know what to specify. Taking THIS site for example. Which one would be suitable just to open for 1 min then close again. Would want at least a 2mm oriface and low power usage. The less the flow resistance the better for me.

As you can tell this is way over my head.

Thanks