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Old 01-04-2013, 02:33 PM   #21
ColoHox
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I'm about to build a single tier brew system, it will be fired with propane. Am I correct in thinking that gas grill propane bottles are high pressure and that the electronic gas valves are generally low pressure, or does it have nothing to do with the container and all about the regulator?
It depends on the regulator. Electronic gas valves need a set 11" WC regulator, aka low pressure.
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Old 01-05-2013, 02:00 AM   #22
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It depends on the regulator. Electronic gas valves need a set 11" WC regulator, aka low pressure.
If your using Honeywell gas valves the regulator doesn't mean as much, due to the ability of the gas valve to control inlet pressure and and outlet pressure. You do need to make sure the regulator is big enought to handle the required BTU's for your burners. I have included the link for the electronic ignition gas valve. Let me know if you need the standing pilot link instead.

https://www.forwardthinking.honeywel...ll/69_2013.pdf
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Old 02-09-2013, 08:54 PM   #23
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If your using Honeywell gas valves the regulator doesn't mean as much, due to the ability of the gas valve to control inlet pressure and and outlet pressure. You do need to make sure the regulator is big enought to handle the required BTU's for your burners. I have included the link for the electronic ignition gas valve. Let me know if you need the standing pilot link instead.

https://www.forwardthinking.honeywel...ll/69_2013.pdf
Hey de3isit. I saw your post with your setup on a different thread and I was confused about what pressure you were running into your Honeywell valves. Are you saying you can run high pressure (10-30 PSI) into your Honeywell valves and you get 11"WC coming out of them? I'm sure I'm misunderstanding you here somewhere.
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Old 02-10-2013, 04:25 PM   #24
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While impatiently waiting for a reply I did manage to uncover this document detailing a huge amount of what people want to know about gas valves. So, I thought I'd share.

http://www.invensyscontrols.com/spaw...0SYSTEMS_1.pdf

The important detail that is relevant to my question is that it implies that most gas valves are designed to take a range of inlet pressure (11-14" WC) and adjusts it to about 10" WC on outlet. I can only assume that it does so with the integral regulator. Also it does say that valves will not fail or lock up if used with excessive pressure, it will merely regulate poorly.

So far, I'm concluding that you could probably design a high pressure system and then use a needle valve to step down the pressure leading into a gas valve since you don't need an exact pressure for them to function correctly. Though I guess it's only a tiny price advantage over just using a single stage 11"WC regulator.

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Old 02-10-2013, 05:05 PM   #25
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You can run high pressure LP into the valve as long as you convert the gas valve to LP with the spring kit that comes with it. The outlet pressure is adjustable with an allen wrench.

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