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Anyone recognize these?

Tinman
Tinman Member Posts: 2,808
in THE MAIN WALL
A friend of mine sent me these pics.

I’ve seen some really old B&G zone valves and these don’t look anything like them. They’re decommissioned on an operating radiant system, in series with two pumps in the boiler room.

Numbers on them are SDV-61.

Motorized checks?
Steve Minnich

Comments

  • Tinman
    Tinman Member Posts: 2,808
    Maybe this? But I still don’t know what it is. No further info in this old B & G engineering manual.
    Steve Minnich
  • Ironman
    Ironman Member Posts: 7,563
    Pilot operated flow control valve.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Tinman
    Tinman Member Posts: 2,808
    Thank you. Do you have any document you could share? So kind of a motorized check?
    Steve Minnich
  • Ironman
    Ironman Member Posts: 7,563
    No, sorry I don't. There might be a better technical name; that one came from a distant memory.

    Dan would probably be able to help.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    Tinman
  • Intplm.
    Intplm. Member Posts: 2,209
    @Steve Minnich . Are you sure it said ......"SDV-61"....and not
    "SBV-61"??
    I'm asking cause @Ironman threw me on this one.
    I thought for sure that they are modulating circuit setter balancing valves.
    But now that I read this post....?
  • Tinman
    Tinman Member Posts: 2,808
    I’m not sure. That’s just the information that was given me. I was never on the job. I’m just really curious since he sent the photos.
    Steve Minnich
  • Intplm.
    Intplm. Member Posts: 2,209
    See that, now you got me looking too. Have a vague recollection.
    Dan might know.
  • hot_rod
    hot_rod Member Posts: 23,467
    The B&G site used to have tech sheets on that old stuff, try there. I think they are pilots operated valves.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    Intplm.
  • Mike_Sheppard
    Mike_Sheppard Member Posts: 696
    edited January 2019
    Turn back one page! Picture attached.

    Several more pages before that as well.
    Never stop learning.
    Intplm.IronmanTinman
  • Ironman
    Ironman Member Posts: 7,563
    Thanks, Mike. I couldn't remember what B&G called it.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Mike_Sheppard
    Mike_Sheppard Member Posts: 696
    Absolutely. I love this old B&G Engineering book. So much information in it.
    Never stop learning.
  • Tinman
    Tinman Member Posts: 2,808
    Thank you, Mike.
    Steve Minnich

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