Danfoss valve heads

bigpete638

I’m working on a college campus and there are danfoss valves everywhere missing their hats. They must be older models because all the replacement heads we have are threaded. Is there a website that could point me in the direction of which heads could use on these valves?

Bill_17

The Danfoss valves on your radiators are the old RAV series (likely 1980s or earlier), you'll need an 013G8072 adapter along with an 013G8252 operator (assuming you want a valve mounted dial with integral room temperature sensor) The packing gland, if there is stem leakage is 013U0070.

STEVEusaPA

You mean like danfoss.com?

bigpete638

Thank you Bill_17!

Bill_17

Correction, you should use 013G8250 if you want a valve mounted dial with integral temp sensor, the 013G8252 has a valve mounted dial with remote temp sensor.

bigpete638

We just need to adjust manually. It’s tough getting parts around here. I was told the adaptors were ordered. I doubt it but I’ll just push for new valves if possible. The pins in half the valves don’t move. The t stat guy mentioned those can be replaced as well but after purchasing all material, it might cost same as new valves.

JoeEngineer

The pins often get stuck, especially over the summer. Before replacing all the valves try (gently) freeing them up.

bigpete638

@JoeEngineer is it safe to use a solvent such as yield or wd40 to assist in freeing them?

gfrbrookline

It might not be cheaper but within the ballpark and you would have all new parts and you won't be replacing the valve bodies next year, thus reducing labor cost taking them apart and putting them back together.

Bill_17

You should not use any oil based lubricants on the valve stems, it will destroy the EPDM O-ring seals. Replace the entire packing gland assembly or consider replacing the valves with a current generation.

bigpete638

@Bill_17 thanks again. Material is in short supply. The budget doesn’t allow much and I’m working on a campus with 32 buildings. The heating systems in all of them should have been replaced twenty years ago. I’m going to need a lot of help. It’s great to be working on a high pressure plant though. I really appreciate all the information from this site.

Alan (California Radiant) Forbes

Will silicone work on those valves?

gfrbrookline

I would replace the worst offenders, or the ones in the president's office. If you can get buy in by showing results you will likely see improvements in your budget to do the rest. Over time as more valves are replaced you should also be able to show improvements in operating efficiency which will help your cause.

Intplm.

The trouble with replacing all of them is that they are in a college dorm.
The college kids will do this all over again. I've been in a similar situation. Is there a alternative valve that is more sturdy? More vandal proof?

bigpete638

I’m lucky to not have to deal with dorms. None on our campus. I think they have manual danfoss valves. Just an adjustable cap as opposed to a head that looks to be easily damaged.

bigpete638

https://www.supplyhouse.com/Danfoss-013G8020-3-4-Straight-Thermostatic-Radiator-Valve?gclid=CjwKCAiAzuPuBRAIEiwAkkmOSFuYdAWkVqan8BfUtc15ILDY_rw_6k8J5aFWcYlbj0v140w2fDU8TBoCpnEQAvD_BwE
Think this is it off a supply house website

bigpete638

It appears I forgot to say thank you for all the information.  Sorry for the delay.