Old cast iron baseboard radiator valve question

gr8dane

I have old cast iron radiators, the stand up radiators have valves with knobs, but the baseboard rads have a hex head and flat head in it.

How can I turn off / adjust the flow.

The first floor is all one zone, and the front room has all of the electronics so gets much warmer, with no heat on the front room can be 5 degrees warmer than the back rooms, and I would like to restrict the flow of the front room radiator.

Intplm.

That picture looks like an air bleed valve and not a form of shut-off.

Some more pictures of your heating system of this and other radiators would help in answering your other questions.

gr8dane

This is the bleed valve, I can see all the pipes for the first floor and see all of the loops on the first floor zone

gr8dane

I'm pretty sure it's a n old butterfly valve, and the notch of the flathead slot shows the direction of the flow, just want to make sure

pecmsg

You can try and turn it. You might have to loosen the nut as well.

Easiest thing is placing some aluminum foil in the fins and slow the air flow.

Grallert

With a good adjustable wrench hold that nut and back it off slightly. while keeping ahold of that nut use a good flat head screw driver and try to turn that screw, it indicated the direction the valve is in and should restrict the flow.