VALVE DEVICE

摘要

A valve device, comprising a valve housing body having a flow passage for a fluid, a valve guide formed in the valve housing body, a valve stem opening and closing the valve by sliding in the valve guide, a hydraulic actuator opening and closing the valve, and a hydraulic control valve controlling the hydraulic actuator. A scraper scraping off deposit adhered to the valve stem is fitted to the flow passage side end part of the valve guide. Also, the hydraulic actuator and the hydraulic control valve are formed integrally with each other in the valve housing body. In addition, the valve device comprises a nozzle with a restricting part for jetting pressurized oil for cooling toward the valve guide.