Alex,
Perhaps I should have made it clear from the beginning that even though I address some posts to you, it applies to ALL readers here!
That is my way of up-dating everyone at the same time.
Otherwise, I would receive a large number of emails (and phone calls) with all kinds of questions about practical details which are just common sense!
Take for example the need for a pressure relief valve.
It is a MUST because
IF the pressure control electronics fails to turn off gas production, pressure WILL build up to dangerous levels until something “gives”!
(like electrolyser cracking – fuel injector damage due to over-pressure, etc!)
I would also like to comment on gas volume measurement.
Let's face it, not everyone can afford an expensive 'flow meter' which is really only needed
ONCE (unless experimenting a LOT with different types of electrolysers).
That is why I suggested a DIY type which anyone can make, for a fraction of the price of a commercial flow meter!
Further, most (if not all) readers who have “checked-out” my WFGP ECU design would have discovered by now that it also incorporates a TIMER – switching the electrolyser power supply ON/OFF.
It can also be used for REPEATED gas volume measurements.
OK.
You have asked for minimum/maximum pressures for the electrolyser.
While I have already answered these questions before, here it is all again:
Gas pressure is SOLELY determined by the injector used.In this case – Poliauto-JET21 – recommended working pressure approx.
10 PSI.
So, THAT is the MAXIMUM pressure.
Clearly, there is NO minimum pressure since the working pressure is SET to 10 PSI and only varies a fraction of a PSI. (which is set by 'Hysteresis' on the pressure regulating module)
Since the JET21 is a large capacity injector, the injected gas volume can be reduced either by lowering gas pressure or reducing its opening time - or both!
These are general guides only as generator sizes vary by a very large margin!
You have also asked if I could recommend pressure relief valve types and suppliers.
Again, there is a hell of a selection of those “out there”!
However, we need the type(s) made for gas (air), NOT liquid (water).
I am posting two eBay links here, one is for adjustable pressure relief valve only, the other is for
adjustable pressure relief valve + filter! (both with pressure gauge!)
Check them out!
Both seem SUPERB value for the money!
http://www.ebay.com.au/itm/AR2000-Air-Control-Compressor-Pressure-Gauge-Relief-Regulating-Regulator-Valve-/190776079718http://www.ebay.com.au/itm/Black-Pneumatic-Air-Source-Treatment-Filter-Regulator-w-Pressure-Gauge-AFR-2000-/311355532440?pt=LH_DefaultDomain_15&hash=item487e3c6498Cheers,
Les Banki