Search found 123 matches

by daves1459
Fri Jul 19, 2019 8:26 pm
Forum: Live Steam
Topic: Lubricator
Replies: 17
Views: 917

Re: Lubricator

My Torrington catalog says for full one way clutch capacity and life the shaft should be Rockwell "C" scale 58-62. That hardness is about the same as a dowel pin. Oil hardening, water hardening, and air hardening tool steels will work. Although the quench temperature is quite high. Not just red hot,...
by daves1459
Wed Jul 17, 2019 9:58 pm
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 1034

Re: Air Compressor control

Hello Richard, Thank you for taking the time to draw your schematic and it's description. I now understand your intent. I see possibilities. Do you think the control piping for the "Normally Closed Valve" could come directly from the "Main Control Valve"? If so I could make the "Normally Open Valve"...
by daves1459
Wed Jul 10, 2019 10:07 pm
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 1034

Re: Air Compressor control

RET, My air compressor is actually is a single stage single cylinder design. The prototype application is 1893. I don't believe the cross compound designs arrived until 20 or more years later. It crossed my mind that stalling the compressor would cause pipe, steam chest, and cylinder to fill up with...
by daves1459
Sun Jul 07, 2019 8:06 pm
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 1034

Air Compressor control

I'm building a Winton Brown 1 1/2" scale Westinghouse 9 1/2" air compressor for my NYC & HR 999 project. I plan to install straight air brakes to as close as practical emulate the original air brake system. One of the items to that end is a governor to regulate the air compressor. I have acquired a ...
by daves1459
Thu May 23, 2019 10:18 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

Re: Super heated Steam Throttle Lag

Why is ptfe a concern? The only place I can see where it would be used would be if a ball valve is used for the throttle valve. Why not use an all-metal gate valve if the throttle is in the smokebox? I’ve seen such ball valves get cooked in the smokebox, even without superheaters. The concern is no...
by daves1459
Wed May 22, 2019 9:58 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

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 go...
by daves1459
Tue May 21, 2019 10:20 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

Re: Super heated Steam Throttle Lag

Steam from the dome throttle enters the center tube of the SH at the smokebox and goes to the firebox tee fitting. Then around the other 2 legs of the SH and back through the flues to the smokebox and to each cylinder. The pipe unions come up to a tee and are the exhaust blast. for some reason i ca...
by daves1459
Tue May 21, 2019 10:15 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

Re: Super heated Steam Throttle Lag

Dave, Looks excellent, well done! I'm using this method of welding the SH return ends, too some 40 years now with best results :) But I don't recommend enlargeing the back ends into the firebox due to the risk of overheating! Please think about of firing by means of the blower at standstill. One ca...
by daves1459
Tue May 21, 2019 9:48 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

Re: Super heated Steam Throttle Lag

Just an idea but would it be possible for the dry pipe to run directly from the steam dome to the back of the firebox as per Fred's pic then have a few back and forth loops across the top of the firebox, then two pipes, again per Fred's pic back to the smokebox, then combine at the throttle valve, ...
by daves1459
Tue May 21, 2019 9:40 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

Re: Super heated Steam Throttle Lag

Looks great! The return bends are the only part of my boiler that I did not make myself. I had a professional welder do that for me. To keep the inside of the return bend free from weld, I think he flooded the tube with an inert gas, maybe nitrogen, I'm not sure though. My fire box is pretty short ...
by daves1459
Wed May 15, 2019 8:42 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

Re: Super heated Steam Throttle Lag

With the process development out of the way I proceeded to make the five elements needed for my loco. At present each element will be 29" long depending upon how far they protrude into the fire box area. The photo looking straight down into the fire box shows my thought on how far that protrusion sh...
by daves1459
Wed May 15, 2019 8:22 pm
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4684

Re: Super heated Steam Throttle Lag

I'm proceeding with the installation of a super heater. My dry pipe connection in the smoke box allows me to remove the super heater and convert to saturated steam with out a horrible amount of work in the event the super heater becomes a problem. A question: Since one of the main efficiency improve...