Actual use, is the apex of stem as a sign that the fixed position, as its fully open position. Temperature appears to consider locking phenomenon, usually open to the vertex position, and then rewind 1 / 2-1 circle, as the location of a fully open valve. Therefore, the fully open position of the valve, the valve processors, according to damper position (ie, travel "to determine. Some valve stem nut located at the gate, handwheel drive stem rotation, leaving the gate to upgrade, valve, this valve is called the rotating rod valve or valve called the dark bar advantages: 1, small flow resistance inside the body media channel is straight, stainless steel valves, medium into a linear flow, flow resistance is small .2, when the headstock more effort. is compared to the cut-off valve is concerned, because either open or closed, the gate movement direction perpendicular to both .3 flow direction of medium height, long opening and closing time. larger gate opening and closing stroke, drop is carried out by the screw .4, easy to produce water hammer phenomenon because the long closing time movement:.. gate valve with the valve stem linear movement, also called clear shot valve Often movements are trapezoidal threaded rod , valve manufacturers, through the valve top nut and the guide groove on the body, the rotary motion into linear motion, which is the operating torque thrust into action when the valve is opened, when the gate valve lift height equal to diameter of the 1: 1 times, the fluid channel is completely smooth, but at run time, this position is not monitored valve manufacturers _ _ Valve Valve Co., Ltd. Shandong Everbright Shandong Everbright valve by valve manufacturers _ _ Shandong Everbright valve valve Shandong. Everbright Valve Co., Ltd. (www.sdgdfm.com) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, for the latest information, Contact: Manager Ma.