3/4 Sarco v-12 rad return gizmo circa 1938 ?

neilc

I need some help,
building is from 1938, may have / likely started as steam,
hot water now,
all rads have Sarco v-12 rad return gizmos on them,
2 aren't flowing, they have in the past, and seem intermittent now,

anyone have literature on these?
how they work?
there is a packing, and slotted stem on the top,
stems turn, don't seem to thread up or down,
I am assuming a ball valve type needle, ??





called Sarco, they don't go back that far,

bburd

That looks like a quarter turn balancing valve. It works the same as a gas cock. When the slot is parallel with the pipe it is open, and when the slot is perpendicular to the pipe it is closed.

neilc

that's what I thought also,
7 work fine, slot aligned with flow,
2 don't work, slot aligned as the 7,
I need pictures of inside before I open them up

mattmia2

I think there is a little ball in there that the stem adjusts the travel of. If it is what i think it is, it is a type of water seal steam trap. there are other threads on sarco systems if you search for them, google seems to work better than the integral search.

neilc

this place, HeatingHelp, is too cool,
it's a SarcoFlow, a balancing valve,
https://heatinghelp.com/assets/documents/59.pdf
pg 6,
just a big ole slotted ball valve,
I told Sarco I would call them back when I found it here so they would know,

neilc

Google searched
sarco v-12 site:heatinghelp.com
thankyou @mattmia2