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Right Angle Cast Iron Hot Water Radiator Valves 1/2 Turn
Comments
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Those valves were for "balancing" the radiators, adjusting the flow so that each room got the right amount of heat. It was a fool's game because the heating load in different parts of the house depends upon conditions, and changing the valve on one radiator affects the flow in the entire system. Also, if you look at a curve of water flow vs. heat output it's not at all linear, so there are parts of the curve where minute movements of the knob cause big changes, and parts of the curve where big movements don't really change anything.
They went out of fashion when thermostatic valves became available.0 -
DCContrarian said:Those valves were for "balancing" the radiators, adjusting the flow so that each room got the right amount of heat. It was a fool's game because the heating load in different parts of the house depends upon conditions, and changing the valve on one radiator affects the flow in the entire system. Also, if you look at a curve of water flow vs. heat output it's not at all linear, so there are parts of the curve where minute movements of the knob cause big changes, and parts of the curve where big movements don't really change anything. They went out of fashion when thermostatic valves became available.
The small opening was to allow a small water flow to prevent Freezing.0 -
We use ball valves today.
There was an error rendering this rich post.
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Probably because machining the pieces to seal without some sort of gasket material is more costly than using a washer or other seal and is fairly prone to damage from minor corrosion.0
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The sleeve type valves were never meant to seal, they were meant to slow the flow of water.mattmia2 said:Probably because machining the pieces to seal without some sort of gasket material is more costly than using a washer or other seal and is fairly prone to damage from minor corrosion.
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