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Question:

Does a valve have to be completely opened or closed?

My house has hot water baseboard heat. In the basement, there is a wood burning stove (now it is like a radiator) that has the pipe system going through it Between the pipe in and the pipe out is a valve. Does it have to be opened or closed all the way? There is no other way to control the heat in the basement I was thinking of opening the valve half way, but I do not want to destroy the valve.

Answer:

If its open all the way it would be hotter so I dont think it would hurt nto keep it half way
you can definitely close the valve half way. Most gate valves or ball valves i install aren't fully open because if its completely open overtime that valve can seize up and never close again.
The amount that the outflow valve is open depends on a number of things. It's function is to regulate the atmospheric pressure inside the pressurized areas of the plane.
you have water baseboard pipe heat running through your Wood burning Fireplace? is that correct? At the end there is a valve? If so these two have no correlation with one another. Your water heating system is pumped through with a circulating pump and the temperature is controled by a thermostat. If If the house is hot then you have a thermostat problem OR there are zone valves located within the piping that opens and closes according to your thermostat setting. If you are not getting comfortable temps then check this little zone valve motor and replace. Just open all the baseboards covers until you locate a little zone valve motor valve. Change this out and see what happens.
There are basically 2 types of valves, gate valves and globe valves. Gate valves are designed to either be opened all the way or closed all the way. Globe valves are designed to be able to throttle flow proportionately. They can control flow from 0% too 100% or anywhere in between. Setting your valve to the halfway position will not harm it, regardless of what type it is. Experiment with it a bit to find the setting that works best for you. Be aware that if you reduce the flow of water through the heat exchanger portion of your wood stove, the heat will have less water to be absorbed into. That could result in the water overheating and turning to steam. That will cause pressure to build in the line or pipe. Too much pressure will burst the pipe and could be hazardous.

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