There was some discussion awhile ago about regulators for propane.
I searched, but didn't find anything useful.
Where can I get a regulator, and what should the pressure range be?
It's usually given in 'bars', how does that convert to psi?
I assume a bar is one atmosphere, or about 14.7 psi?
The valve I'm using doesn't seem to deliver enough propane volume, it starts quicker if I invert the bottle momentarily.
Maybe a regulator would work better?


Thanks

http://www.chromatography.co.uk/TECH...r/Pressure.htm

The CJM air pressure meters that I use are in bars, so I just edited the above chart down to the pressures that I was interested in, and pasted that on the side of my compressor.

Gordon

Hi Pete,

We've found a regulator that we feel is ideal. It regulates to roughly 15PSI, and I've had excellent results using it on all the SimJet enignes I've tested. We're adding them to our lineup of accessories at Great Northern Models. I'll let you know as soon as they come in.

Hi Pete,

On my Simjets I use 0.8 Bar pressure and never missed a start. My Gas mix is 70% Butane to 30% Propane.

BRG
Chris

High Pete:

Hope your well.

The pressure conversion is 14.5038 psi = 1 Bar.

Kerry S.
SIMJET of Penn.
[email protected]

Thanks for the responses guys.

I've never tried the Butane mix, that's at a lower pressure right?
I know it's required for the on-board propane start, because of the lower pressure.
Any advantage as far as the heat it burns at etc.

Kevin, let me know when you get them in.

You're absolutely correct about the lower pressure of the propane/butane mix. SimJet engines will start on Powermax (and other blends) just like the other guys, but I prefer the cheaper and more readily available propane.

I believe the blended gas does in fact burn hotter, so you should come up to temp more quickly.

Will do on the regulator...

I have used two different types of Bernzomatic propane torch reg's with good results. They are available at most hardware stores, and screw on a standard propane bottle. Cheap and easy.

Andrew

I've been building them for some time now. Can regulate all the way down to 0 psi. Has a simple On/Off so that you don't change your regulated settings. Works great! Here's some pics.

.

If you are interested in purchasing these - go to the Product Announcement & Manufacturer News, that's out on the main page almost all the way to the bottom. You'll see the subject: Regulated Propane Valves. All the information with pricing is located there.

I've been trying to figure this stuff out for the last 40 gallons of flying my AMT 180 Kangaroo.. I have access to alot of premium valving and flow regulators and pressure regulators since I'm into high tech industrial automation pneu/hydr, and here are a few things I have observed. On a straight propane can from Walmart I need about 30 psi . Problem is with the heat of the sun the internal pressure in the can can exceed 100psi and then when cool can be down below 50psi. A standard air regulator as pictured above still cannot regulate well with such a varied extreme on the input side. I've tried the low budget approach and it still is not a set and forget. it is a difficult task and I have finally solved it for me, but it is way too expensive, it involves a high tech 2 stage pressure regulator ($180), with a course side screw adjustment that feeds into a secondary chamber with a fine adjustment screw..this is then plumbed into a patented one of a kind (not my claim but the OEM's) adjustable constant flow metering device ($150). This has gotten me to a set and forget setup no matter what the the temperature of the propane bottle becomes.... Just my .02 based on trial error approach

Another thing I found intersting on the subject is Festo has no ratings on their products outside their use with air. Atleast thats what my rep claimed.......They do have a nice miniature pressure regulator with a built in regulator in bars and has QD fittings on inlet/outlet that works decent, but still needed adjusting based on inlet pressure extremes. Hope to meet some of you @ Superman!!!!!! 8 days and counting.........

.

Pressure chart

Grainger, Clippard, SMC, Festo, Beswick............

I think that I may be able to help you. Please e-mail me at:
[email protected]


Best Regards,
Todd