@arelektroda
In the past, mainly thermostatic valves without pre-regulation were used, as a result, orifice was performed by setting the appropriate number of turns on the screw of the return valve, as described by 1702.
Currently, thermostatic valves with pre-regulation are standard, and valve manufacturers also provide a chart with the characteristics of such a valve, which makes appropriate setting much easier, even for a technically-savvy person.
From what we have established, the author of this thread does not have a valve with initial adjustment, so in this particular case, the description 1702 makes sense, although it generally does not fit new installations.
The correct selection of the number of revolutions should be calculated for a given radiator, and not accidental. Similarly to the initial setting, it should also be preceded by calculations and not random settings, but practice shows that most people do everything on the so-called cock.
Kowalski may be guided by the principle that the smallest radiator and the one closest to the boiler may be more twisted if it has an installation based on tees. Because if it has a distributor, the flow can be limited at the distributor, so additional blocking of the flow at the radiator may be unnecessary.
