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MANUALS (1)
Product Highlights
Description
The venting capacity of radiator air vents and main line air vents used in single pipe steam heating systems has an important effect on the operation of these systems. In order to obtain a better understanding of these effects, The Center for Energy and Environment conducted experiments both in the laboratory and in the field to investigate the properties of single pipe steam air venting.
Commercially available radiator and main line air vents were tested and compared. Main line air vents in one building were replaced with open pipe orifices of different sizes, and the resulting fill characteristics of the main steam lines were observed.
The purpose of the main line air vent is to rapidly vent the relatively large quantity of air in the main lines. This allows the main lines to fill more quickly and thus reduces the time difference of steam arrival at the different risers. A larger orifice allows the air to be pushed out at a lower back pressure.
The function of the radiator air vent is to provide a means for air to be driven out of the radiator as steam enters. At a given pressure the fill time of a radiator varies proportional to its heat capacity and inversely proportional to the venting capacity of the radiator air vent.
It is possible to control the speed at which a radiator will fill with steam by installing a radiator air vent with a certain venting capacity. Used in this manner, radiator air vents are helpful in evening out the heat distribution in a building.
Adjustable valves can be installed anywhere in your home and adjusted based on the distance from the valve to the boiler.
Specs
| Application: | Radiator Vent |
|---|---|
| Size: | 1/8" |
| System Type: | Steam |
| Material: | Brass |
| Body Pattern: | Angle |
| Mount: | Angle |
| Adjustability: | Adjustable |
| Thread Type: | Male |
| Temperature Range (F): | 140°F - 240°F |
| Max Temp (F): | 240°F |
| Min Temp (F): | 140°F |
| Thread Size: | 1/8" |
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Flawed Design
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YES!
Work as expected
All Good.
Purchased and got more
Nice adjustable vent
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Product Q&A
2 QuestionsQ: Where should I set the valves for this situation? 3 small bedrooms upstairs, 1 large living rm/dining rm main floor. Thermostat on main floor. I am looking for a balance of heat because it's always way too warm upstairs than down. So much more than "heat rises" can explain.
Asked by Rick 12 years ago
Add your answer
Would help to know how the vent valves are set now. But in general you need to slow the venting upstairs and speed up the venting downstairs. In other words, the vents upstairs should be closed a bit and the vents downstairs opened a bit. It will take a few tries to get the balance right
Hello. A solution to your problem could take a bit of trial-and-error and tinkering. Most issues with single-pipe steam heat have the opposite problem - upstairs rooms remain cold while first-floor rooms are warm. If you go with the Varivalve, I would try opening the vent all-the-way on the radiator on your main floor closest to your thermostat. This will cause that radiator to heat up very quickly and trigger the thermostat to stop your boiler's cycle when the set-temperature is reached. For your radiators in the three bedrooms upstairs, I would close the Varivalve vents half-way at first in order to slow down the rate at which those radiators heat up. If the bedrooms get too cold, you'll need to experiment a bit in order to get the right balance. Eventually, you'll find the right combination between changing the vent settings. Just remember...the more that you open the vent, the quicker the radiator will purge air and the faster it will heat up.
Would help to know how the vent valves are set now. But in general you need to slow the venting upstairs and speed up the venting downstairs. In other words, the vents upstairs should be closed a bit and the vents downstairs opened a bit. It will take a few tries to get the balance right
I assume you have steam heat. I don't know if the valves will help. Maybe a matter of having too big/many radiators upstairs and too small/few downstairs. You can try setting all the upstairs valves to the fully closed position and all the downstairs valves to the fully open position. That is supposed to bring that steam to the "open" radiators faster, but I have not noticed that much control of the heat when I've tried to change the openness on mine. Sorry couldn't be more help.
Q: How do adjust for maximum heat ?
Asked by Rich 12 years ago
Add your answer
At top of the unit, their is a sliding adjustment. Open max for fastest heat flow. Be aware adjusting this to faster heat rise will slow other radiator from getting steams. Needs to balance setting for whole system to warm house up evenly.
Hi. For this vent, simply move the slide all the way to the left for the most open setting. This will allow it to purge air at the fastest setting and for the radiator to warm up quickly. Do not use the maximum (most open) setting on radiators that are in the same room as your thermostat. You'll want those to get hot slowly in order for the radiators in the other rooms in your house to warm up first.