I picked up a small used electronic ignition foundry with a sand table and all the goodies. I am unsure of the orface whether it's propane or natural gas. How can I determine this?

I have no casting experience, but have read a few books on the process. Any recommendations would be helpful.

thanks,
Kenny

I don't know anything about gas furnaces either, mine is electric. My best recommendation is THINK CAUTION AND SAFETY AT ALL TIMES! Ron

I'm with ya, I would hate to scortch my beard...

If you want to guess you can hook it up to natural gas. Of the two, natural gas takes the larger orifice. Your risk is that the flame will blow out if it can't feed enough gas.

Kenny,

Natural gas will have a much larger orifice and a blower because of the low supply pressure. My natural gas burner uses a .5" inlet that is 90 degrees to the burner body. The propane orifice will be quite small, probably in the neighborhood of .035". Most propane burners use high pressure regulators eliminating the need for a blower and they shoot right down the center of the burner.

Check out Ron Reil's (http://www.reil1.net/design1.shtml) site for burner design. It has a wealth of information that should help you.

Mike

GREAT web-site, Thanks. Just added it to my favorites list! :cheers:

Hello,

Also check out the hobbicast Yahoo group. Lots of info and knowledgeable guys there...

http:groups.yahoo.com/group/hobbicast

Ballendo

Thanks eveyone for the links and advice, it's appreciated.

Kenny