Cold spots on steam radiator

Big Ed

Maybe the radiator steam vent was installed incorrectly in the upper hydronic tap ?

SC

Cold spots on steam radiator

One pipe system, the radiator has several cold spots. Pitch is good. Any ideas.

T-O

I don't understand "several cold spots" - Usually if a raiator had a cold spot is lower half sections from about the the middle to the air vent section.
T-O

chuck_6

Cold spots - may need more venting capacity

Sean:

You may need more venting capacity on the radiator. I would only go with Gorton vents. Try a Gorton C or D. The D is the most open. You may also want to make sure that your main vents are properly vented. Speak to Ken at Gorton. His number is (908) 276-1323.

Chuck

soot_seeker_2

Radiators

...do not heat evenly.

On a one pipe steam radiator, the steam enters the bottom and rises into the first few columns. It works its way along the bottom nipples rising up columns as it goes from supply to vent. It usually rises up the last column, lkeaving several of the last columns cool on top before it closes the vent.

These cool sections represent an air bubble which will work itself out as the vent opens and closes, as long as the boiler's pressurtrol setting does not exceed the vent's drop away pressure.

So it's normal for a one pipe steam radiator to have cold spots unless the day is cold enough to require a long run time of the boiler.

Long Beach Ed