Search found 156 matches

by southwestern737
Wed Sep 11, 2019 8:58 am
Forum: Live Steam
Topic: Throttle valve -again
Replies: 2
Views: 918

Re: Throttle valve -again

No clue as to how much if any superheat, but I am getting dry steam. No doubt about the smoke box temp being high, but I see guys firing as hard or harder and they don’t seam to have any trouble with valves. I think i am just going to build a new throttle, it should handle the heat better.
by southwestern737
Tue Sep 10, 2019 3:47 pm
Forum: Live Steam
Topic: Throttle valve -again
Replies: 2
Views: 918

Throttle valve -again

OK here we go again, after burning out the last throttle valve ( ball valve with graphite seats ), on my oil fired 1.6 Mikado, I rebuilt my super heater to reduce the amount of superheat, and replaced the ball valve with a fast opening gate valve. I just fired it for the first time after the change ...
by southwestern737
Wed May 22, 2019 4:37 am
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 6361

Re: Super heated Steam Throttle Lag

I have enjoyed following this thread, I just got my Heavy Mikado fired up a few months ago, it has a superheater. I am in the process of decreasing the amount of superheat because I am destroying throttle valves. Originally my superheater elements ran all the way to the back of the firebox, I am goi...
by southwestern737
Sun Mar 31, 2019 4:01 pm
Forum: Live Steam
Topic: Mikado first run
Replies: 10
Views: 2209

Re: Mikado first run

As for the location of the valve I had a very difficult time deciding if it should be up or downstream of the superheater, I chose downstream for simplicity of piping and I also thought it would be more efficient (steam would have more time in the superheater) and also not be susceptible to runaway ...
by southwestern737
Sun Mar 31, 2019 3:44 pm
Forum: Live Steam
Topic: Mikado first run
Replies: 10
Views: 2209

Re: Mikado first run

The valve I am using came from McMaster Carr, it actually is rated for 550 degrees, I looked at so many that I got all the specs mixed up. It was $188, the 750 degree valve was over $600 from a valve supplier, McMasters price was actually pretty good. I am happy with the new valve, hope it lasts a l...
by southwestern737
Fri Mar 29, 2019 5:18 pm
Forum: Live Steam
Topic: Mikado first run
Replies: 10
Views: 2209

Re: Mikado first run

My original throttle valve was a steam rated 90 degree ball valve, it said not to use it for throttling, and they were right. The problem is that there is only one end of the ball that has a seal on the 90degree valves, and the seal was Teflon so it began to flow and not let the throttle close. I fi...
by southwestern737
Fri Mar 29, 2019 1:33 pm
Forum: Live Steam
Topic: Mikado first run
Replies: 10
Views: 2209

Re: Mikado first run

Ok, the link is fixed. This was the first run and it was short. The ball valve I used for the throttle failed after about 500’. I replaced the valve and branch piping, made a change to the firing valve and have run it about two hours. This is my first attempt at oil firing, I wasn’t so sure after th...
by southwestern737
Fri Mar 29, 2019 12:50 pm
Forum: Live Steam
Topic: Mikado first run
Replies: 10
Views: 2209

Mikado first run

I finally finished my Mikado, here is a short clip of the first run.
https://youtu.be/0wJbtDSl6bQ
Brent
by southwestern737
Thu Nov 15, 2018 9:03 pm
Forum: Live Steam
Topic: Harpur/Allen Mogul Smokebox Configuration
Replies: 5
Views: 1874

Re: Harpur/Allen Mogul Smokebox Configuration

No nuisance at all, mine has been trouble free for years.
by southwestern737
Mon Oct 22, 2018 5:18 pm
Forum: Live Steam
Topic: Trailer w. trains stolen in Texas Saturday
Replies: 23
Views: 4902

Re: Trailer w. trains stolen in Texas Saturday

JT’s trailer and equipment have been found safe. Don’t know any details just got the email. He did have LoJack or similar on his trailer.
by southwestern737
Sun Sep 16, 2018 5:22 am
Forum: Live Steam
Topic: Re-facing Slide Valve & Ports
Replies: 53
Views: 7359

Re: Re-facing Slide Valve & Ports

David,
Sorry to send you down the Rabit hole but that was “Lycurgus” must have been an auto type, or auto correct, mistake. I didn’t see it until now. Just check whatever you are using and it should specify for wet or dry steam, not sure but I think green velvet is only for wet steam.
Brent
by southwestern737
Mon Sep 10, 2018 8:18 am
Forum: Live Steam
Topic: Re-facing Slide Valve & Ports
Replies: 53
Views: 7359

Re: Re-facing Slide Valve & Ports

Something in your last post caught my attention, you said “superheater”, our scale super heaters normally don’t get hot enough, but it is possible that your steam oil is not holding to the the dry steam, you my check the specs on Lycurgus steam oil. Just a thought.
Brent