The invention discloses a valve device and belongs to the field of valve devices. The valve device has the beneficial effect that losses of heat energy of hot water in a pipeline are reduced. The valve device comprises a valve and a water pipe. The valve is arranged at the starting end of the water pipe. A valve rod of the valve is connected with a soft metal rod. The soft metal rod extends synchronously along with the water pipe and is clamped on the surface of the water pipe through spaced buckles up to a controller at an elbow of the water supply terminal and connected with the controller. The controller is fixed to the elbow through a circular locking ring on the lower portion of the controller. A hand wheel rod of a hand wheel penetrates downwards into a support located on the locking ring and is in thread-locking connection with the support through a lock nut. An axial locking hole is formed in the lower end face of the hand wheel rod. The soft metal rod penetrates through the locking hole and is locked through a lock screw. The valve device is applicable to devices in houses.