Hard Sealed Rising Stem Gate Valve Z41T-10Q/16Q

Z41T rising stem gate valve, also known as rotary stem gate valve ( non raising stem wedge gate valve). The valve stem nut is located on the gate plate, and the hand wheel rotates to drive the valve stem to rotate, thereby lifting the gate plate. Usually, there is a trapezoidal thread at the bottom of the valve stem. Through the thread at the bottom of the valve and the guide groove on the valve disc, the rotational motion is transformed into linear motion, that is, the operating torque is transformed into operating thrust. When opening the valve, when the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid channel is completely unobstructed, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position that cannot be opened, as its fully open position. To consider the phenomenon of locking due to temperature changes, it is usually done by opening to the top position and then reversing 1/2 to 1 turn as the fully open valve position. Therefore, the fully open position of the valve is determined by the position (i.e. stroke) of the gate.