Radiator vent install in wrong place?

paul77

Hi,



I just noticed that one of my radiator is not getting fully hot.

The first area that gets hot is the section where the vent is attach, opposite of all my other radiator.



The vent shut after that and the radiator does not get all hot.

 There is some kind of screw on the rear top right corner, anyone know the function of that?

Jean-David Beyer

wrong place?

You seem to have a 1-pipe steam system; so I, as a non-expert would say your vent is in the right place. If you mean the place at the top right of the radiator, as you face the end where the pipe does not go in, that is where you would put a bleed valve if you were running a hot water system.

The Steam Whisperer (Formerly Boilerpro)

Venting

Your vent is in the right place, but may be too big.  It looks like a Maid O Mist, and these usualy have adjustable orificed that screw out the top.  Try using the smallest orifice.  Also, make sure the supply valve is fully open.

paul77

venting

yes, it is a Maid O Mist, and i have try small and bigger one.







The strange thing is, this radiator start to get hot from right to lift.



The right side is where the vent is attach, once steam hit there it close and air can't get out anymore. 

SBoston

The size of the radiator

Maybe it is due to the size of the radiator. The steam is taking the path of least resistance and is scooting across the radiator right to the vent closing it early. Maybe an adjustable vent would allow more control of the vent rate.

SBoston

D

crash2009

Those radiators are very powerful

once you get them vented correctly.  As Boilerpro suggested slow the venting and make sure the valve is all the way open.

paul77

vent size

ok, thanks everyone for their help.

I went and got the smallest vent available in the store, Maid O mist #5.

well see want happen when the next heat cycle comes on.

crash2009

You might need to get the 4

The maidOmist 5, vents at 0.158, at 2oz

The maidOmist 4, vents at 0.045, at 2oz (about three times slower)

MaidOmist also has a hardware store model that comes with all 5 orfices (1 vent-5 speeds)

try the 5 and if you have to, get the 4.  A couple others that vent real slow are Ventrite #1, Hoffman #1A, What number or letter did you have on before? there are 5 speeds D,C,6,5,4.

Oak Park Electric

Just for info...

The screw in the corner is a plug in a 1/8 tapping for a manual vent valve, if this rad were to have been used on a hot water system.  

paul77

Radiator vent install in wrong place?

Thank you everyone for their help.

The #5 Maid O Mist worked like magic, that radiator is fully hot like all other now.

crash2009

Glad it worked out for ya.

Boilerpro Rocks!  That rad really puts out doesn't it?  I have one very similar.  I think its called a Tube type.  Yours can be used for steam or hot water systems.  That screw on the top right corner is for the bleeder valve if it was hooked up to a water system.  If they are vented too fast the steam slips straight through to the vent without warming it up.  Some people have put the air vent in the bleeder hole, then only a third or half the radiator gets hot.