In fact, the Russian part was copied from a foreign one
«Kingisepp Machine-Building Plant» (KMZ) imported the A2105-T02 throttle valve from the American manufacturer IMI NORGREN for Russian KamAZ trucks.
«Castings must be made of complex aluminum alloy ATs4Mg. It has very low fluidity, which threatens the appearance of casting defects «underfilling» and «don't sleep». SKB-3 specialists used vacuum casting technology, which made it possible to obtain high-quality castings that meet all the parameters of the design and technological documentation», — explained in KMZ.
It is reported that the prototype must undergo at least 3 thousand hours of testing. One of the key requirements for a domestic damper is trouble-free operation throughout the entire life of the engine or vehicle (at least 1.5 million km in road conditions and at least 25 thousand hours in off-road conditions).