trv for steam rad

Bob_36

NO sooner did I post my thread, and the nent post was just what I was asking. But if anyone has any other recomendations, I would like to hear any suggestions.

Bob_36

trv for steam rad

I know it's been discussed before, but I can't find the info I need. I would like to know which company is preferred for steam trvs and where to look for them. I want to regulate the second floor rads. Any help would be appreciated.

Kniggit

Ammark, I've seen the thech on it, looks good, if you need more info post again.

Brad White_9

Steam TRV's

I assume you mean vent type valves for one-pipe steam.

Best one's for my money are Macon (Distributed by Tunstall Associates in MA) and Danfoss. Key feature on any of this type is the vacuum breaker, essential to proper condensate return.

Both manufacturers make valves for 2-pipe steam for the supply side also.

Bob_36

Brad, what do you mean by the vacuum breaker? I assume if one particular rad holds closed, you need a way for the condensate to return to the boiler. Is this breaker at the valve location, or somewhere else?

pipewrench_2

Try:

http://www.statesupply.com/displayCategory.do?cuid=FP_VC_Therm_Rad_Valves

Brad White_9

Vacuum Breaker

Bob, you got it right. The vacuum breaker is in the body of the valve.

You understand how these valves work in that they forestall release of air to the air vent based on room temperature. Let's say the room is satisfied for the moment, the valve is closed. The radiator has a good slug of condensate in it's belly.

The air vent is itself a vacuum breaker (normal down-cycle function). But it is now isolated by the TRV. The vacuum breaker in the body of the TRV now has to do the job independently of the air vent. Sort of a bypass around the vent if you would. Condensate is released. Angels sing. The crowd goes wild. Life is good.

Kniggit

Ammark produces a true TRV for one pipes with a Thermostatic seat on the inlet and condensate openings so that it may return while under pressure or not, i'll post with model #'s in the morning

Kniggit

Ammark beagan producing the Type 90 Radiator valve for one pipe steam radiators, avaliable with any of their thermostatic operators. Sorry it took me so long to dig up the info, most of the houses around here have water in the radiators, not steam, so its not a very common part for us.

Bob_36

Thanks for all the responses. I'll call or look up a few of the brands to get locations and prices. I'll let you know how I make out.

Tom_42

TRV Purchase

Do you know where (Internet, Mail Order, Phone Order) one can get these from? I've looked on the internet and cannot find a site that sells them direct to consumers.

Thanks
tom

Kniggit

Not that I think a consumer would want to do this kind of job, it requires a spud wrench to change a radiator valve, and you need to move the radiator to the side a little then move it back. But contact our Office, 913-682-7776 Chuck's Plumbing & Heating, Inc. Leavenworth, Kansas of all places....