sight glass or moisture indictor? is the question.

[sprmktrefertech]

I believe I read once that, on a hill rack they used to use a sight glass,but, it is NOT inline w/ the liquid line, but, instead it has 2 -1/4 " lines that attach it to the side of the liquid line.

Is it true that this style of piping the s/g it is used solely for moisture indicating only and NOT for determining liquid content.

I can try and dig out my old Hill books, but I'm trying to avoid that If possible.

[Phase Loss]

You mean like on page#2?

http://www.sporlanonline.com/SD-21_22011.pdf

[sprmktrefertech]

yes, exactly what I mean...

Thanks, Phase Loss.

[steveoo]

is it a 3/8 line? thats how they did it way back,something to look at and a lot less than a saddle type.

[zw17]

When you start getting into the large pipe they use the "bypass" to cut down on cost. Can you imagine the price tag on a 2" moisture indicator fitting?

It is used solely for moisture indication not as a liquid indicator.

[seemungaln]

yes you are right those hill rack have a sight glass on the liquid line that is a 1/4ins line connected to the shightglass at the side of liquid line so that a mositure indicater did not know that throught that was for liquid.

[bob_scheel]

When you start getting into the large pipe they use the "bypass" to cut down on cost. Can you imagine the price tag on a 2" moisture indicator fitting?

It is used solely for moisture indication not as a liquid indicator.

If installed as recommended it will indicate liquid. The turbulence caused by the small lines and curves will cause liquid with low subcooling to flash in the glass more than the relatively open path in the larger pipe.

[seemungaln]

but in the newer rack they do have sightglass in the liquid line weather it 7/8 1 1/8

[steveoo]

sightglasse's are nice to look at but subcooling is the best way to check charge.

[stanbyyourword]

it will indicate solid column as well