FIELD: valving systems.
SUBSTANCE: method comprises varying the angle of rotation of the rotating slide valve from the intermediate position in both directions with locking it at positions from zero to a maximum. The device comprises housing with the block-module to be tested, control shaft, and control device made of a mechanism for stepless correction and visual monitoring of the hydraulic amplifier connected with the input shaft.
EFFECT: enhanced precision.
1 cl, 5 dwg
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