CONTROL VALVE

摘要

A control valve includes a poppet valve 61 moving in an axial direction relative to a seat hole 21 so as to change a flow-path cross-sectional area of the seat hole 21 and a spring disc 40 biasing the poppet valve 61 in a valve opening direction against the return spring 12. The spring disc 40 includes: a secondary-pressure receiving surface 48 being a portion moving along with a movement of the poppet valve 61, the secondary-pressure receiving surface 48 configured to receive secondary pressure introduced to the secondary port 77; and a pilot-pressure receiving surface 49 configured to receive pilot pressure serving as a reference pressure. The spring disc 40 deforms elastically in accordance with pressure difference between the secondary pressure and the pilot pressure to cause the poppet valve 61 to move in the axial direction.