Pavel.......a question......
The valve on the right side appears as a rotating spindle [globe valve or needle valve with the bonnet bolted to the body] & typical of an Isolation Valve which you have shown on previous builds.......
The valve on the left appears as a rising spindle valve with the bonnet screwed into the body, [and actuated via an external mechanism bolted within or to the connected hoop ?] so if this is the case is an early version of a speed Control Valve?
We also see you have changed from a 4 bolt pattern to a 5 bolt pattern.........any reason for this?
Derek