Mounting Water Glass

This forum is dedicated to the Live Steam Hobbyist Community.

Moderators: Harold_V, cbrew

trivettj
Posts: 50
Joined: Mon Sep 03, 2012 10:01 pm
Location: banner elk north carolina

Re: Mounting Water Glass

Postby trivettj » Fri Nov 17, 2017 5:40 pm

I always run 3/4 glass of water on flat and right at full uphill so when I turn down hill I usually see 1/4 or more in the glass so would that keep me safe? I just measured and the bottom of my glass is right at 1" above the crown sheet.

User avatar
Marty_Knox
Posts: 1204
Joined: Thu Jan 09, 2003 6:50 pm
Location: Michigan, USA

Re: Mounting Water Glass

Postby Marty_Knox » Fri Nov 17, 2017 5:51 pm

trivettj wrote:I always run 3/4 glass of water on flat and right at full uphill so when I turn down hill I usually see 1/4 or more in the glass so would that keep me safe? I just measured and the bottom of my glass is right at 1" above the crown sheet.

Sounds good to me!

User avatar
Fred_V
Posts: 4093
Joined: Sun Jan 12, 2003 3:26 pm

Re: Mounting Water Glass

Postby Fred_V » Sat Nov 18, 2017 8:18 am

trivettj wrote:I always run 3/4 glass of water on flat and right at full uphill so when I turn down hill I usually see 1/4 or more in the glass so would that keep me safe? I just measured and the bottom of my glass is right at 1" above the crown sheet.

It is the down grade you have to worry about not the upgrade.
Fred V
Fred V
Pensacola, Fl.

User avatar
Bruce_Mowbray
Posts: 637
Joined: Sat Jan 04, 2003 7:45 pm
Location: Pennsylvania

Re: Mounting Water Glass

Postby Bruce_Mowbray » Sun Nov 19, 2017 9:56 am

jlakes85 wrote:Hi all,

I think I know what needs to be done, but I'm assuming that the glass will need to be cut to length, unless it can be mounted on an angle, for which I don't think I will have the required real estate. The gauge I'm looking at has both a valve and shutoff cock on the bottom to allow for blowing down properly. I would just need to add a valve on top to complete the setup. Any input is greatly appreciated as always

-jlakes85


Usually (without the use of a water column) the top water gauge valve is mounted to the upper area of the outer wrapper sheet with a soft copper tube leading to the top of the water gauge body. That gives the gauge some relief from the forces of unequal expansion and contraction between the top and bottom of the water gauge and the boiler.
Bruce Mowbray
Springville & Southern RR
TMB Manufacturing & Locomotive Works

trivettj
Posts: 50
Joined: Mon Sep 03, 2012 10:01 pm
Location: banner elk north carolina

Re: Mounting Water Glass

Postby trivettj » Sun Nov 19, 2017 2:54 pm

Sorry for interrupting the post but I want to thank Marty for helping me out with my gauge glass questions im young and want to learn more about what I'm doing the safe way .

jlakes85
Posts: 134
Joined: Thu Feb 23, 2012 6:07 am

Re: Mounting Water Glass

Postby jlakes85 » Fri Nov 24, 2017 10:00 pm

The glass I bought seems to be too tall. Should this be shortened or just used as is?

jlakes85
Posts: 134
Joined: Thu Feb 23, 2012 6:07 am

Re: Mounting Water Glass

Postby jlakes85 » Wed Dec 06, 2017 7:47 am

I've got the water glass mounting location all mapped out. Now I'm trying to figure out how to tie everything in on the topside of the glass, which is tapped 1/8 npt. I believe the largest PM research fittings can accept 1/16 npt, necessitating the use of a reducing bushing. mc masters selection at that size seems to be limited to only high/extreme pressure brass. These fittings are only rated for 1 ksi at 72 F. Since zinc melts at about 780 F I'm just curious why these don't get at least a moderate steam service rating.

-jlakes85

User avatar
Fred_V
Posts: 4093
Joined: Sun Jan 12, 2003 3:26 pm

Re: Mounting Water Glass

Postby Fred_V » Wed Dec 06, 2017 8:05 am

Make your own fitting 1/8 npt on one end and a copper tube union on the other end. Then run copper to the top of the boiler and install with a 90 deg. flare fitting. i can send you CAD drawings for all sizes of unions you can make. They are very handy when doing plumbing and easy to make.
Fred V
Pensacola, Fl.

jlakes85
Posts: 134
Joined: Thu Feb 23, 2012 6:07 am

Re: Mounting Water Glass

Postby jlakes85 » Wed Dec 06, 2017 9:03 am

Hi Fred,

Sounds good. I would greatly appreciate it.

Regards,

-jlakes85

User avatar
Fred_V
Posts: 4093
Joined: Sun Jan 12, 2003 3:26 pm

Re: Mounting Water Glass

Postby Fred_V » Wed Dec 06, 2017 9:30 am

send a PM with your email address so i can send the files.
Fred V
Pensacola, Fl.

jlakes85
Posts: 134
Joined: Thu Feb 23, 2012 6:07 am

Re: Mounting Water Glass

Postby jlakes85 » Wed Dec 06, 2017 11:08 am

Hi Fred,

PM sent.

-jlakes85


Return to “Live Steam”

Who is online

Users browsing this forum: Yahoo [Bot] and 12 guests