Action principle and control oil generation of AST solenoid valve GS061600V: After pressure oil passes through a throttle orifice of 0.8 (at the pressure oil inlet of servo valve), it enters under the pistons of the main valve oil engine cylinders, and also into the bottom of unloading valves on the main valve oil engine manifold blocks; under the action of anti-fuel oil pressure, the main valve oil motors overcome the friction force, steam action force and valve self-weight of the valves. At the same time, the pressure oil sent to the lower part of the unloading valve throttles through a hole on the unloading valve, forming an automatic emergency interruption control oil (AST control oil).

 

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