Can I Replace a Cast Iron Radiator in Heating Season by Simply Turning Off Valve?

Hello,
I'm starting renovations in my apartment and I would like to change the radiator. Can I do this during the heating season? Would it be enough to turn off the valve and remove the radiator?

If you have a permanent one, it's no problem, but if you have a collective one in a block, it's a big problem.

Write more, what valve you have, where and how many.
To remove the radiator, you need to turn off the supply and return.

You cannot replace the radiator in your apartment (i.e. block of flats) yourself. You must obtain the consent of the manager.

There is such a device called the ice cap freezes the power supply and return and it's ready. You need to come to an agreement with the machers in the housing cooperative or in the hospital and after hours it's done in 30 minutes

Freezing is only possible when there is no flow of heating medium through the radiator.

This would be possible during the heating season if there was a valve in front of the radiator not only on the supply branch, but also on the return branch. You can then cut off the water supply to the radiator. The new radiator should have a vent (then it can be installed and vented easily). Speaking of the administration's consent, I changed the radiator in my bathroom (over 10 years ago) (outside the heating season) and the administration may not even know that I have a different one. I also immediately installed a valve on the return branch (it hadn't been there since new), so that I could later (e.g. repair tiles or paint) remove the radiator regardless of the season. I changed the same thing in the kitchen. It is better not to try this freezing unless a specialized company takes care of it.

replacing the radiator is possible in three cases: if there is no water in the system, return valves are installed or by freezing, best regards