Location of valve for pressure gauge with ring syphon on a steam line
Location of valve for pressure gauge with ring syphon on a steam line
(OP)
Why place the valve between the syphon and the pressure gauge as shown in Figure 5 on page 7 of the following link?
http://www.spiraxsarco.com/pdfs/IM/p027_02.pdf
An arrangement with the valve between the pipe and the syphon (about 3/4 down the page, third image from the bottom, in the link below) seems safer to me.
http://www.instrumentationtoolbox.com/2013/02/an-i...
I would omit the drain valve in the second link for my application.
Why place the shut-off valve at the end of a relatively flimsy tube? Why not place it on the pipe-side of the syphon, as in the second link? This would allow replacing the syphon without shutting down the main.
The valve location at the top of the syphon puts it outside the pipe insulation, but a nipple between the pipe and the valve would do that with material that is less vulnerable to damage.
Thanks. W.
http://www.spiraxsarco.com/pdfs/IM/p027_02.pdf
An arrangement with the valve between the pipe and the syphon (about 3/4 down the page, third image from the bottom, in the link below) seems safer to me.
http://www.instrumentationtoolbox.com/2013/02/an-i...
I would omit the drain valve in the second link for my application.
Why place the shut-off valve at the end of a relatively flimsy tube? Why not place it on the pipe-side of the syphon, as in the second link? This would allow replacing the syphon without shutting down the main.
The valve location at the top of the syphon puts it outside the pipe insulation, but a nipple between the pipe and the valve would do that with material that is less vulnerable to damage.
Thanks. W.





RE: Location of valve for pressure gauge with ring syphon on a steam line
if you put shutoff valve on top of the syphon, you can detach pressure gauge for calibration. saving some space is not negligible issue if pipes are run in tight space as height of this setup will define level of piping.
RE: Location of valve for pressure gauge with ring syphon on a steam line
Good question and good post! CB
RE: Location of valve for pressure gauge with ring syphon on a steam line
Here's typical company standard:
RE: Location of valve for pressure gauge with ring syphon on a steam line