Flanged butterfly pneumatic valve and pneumatic valve rod movement patterns

brake pneumatic valve disc is to do rectilinear motion with pneumatic valve stem. For this type of lift not only rotating pneumatic valve stem is called a lift pneumatic valve stem. Because the flange butterfly pneumatic valve opens when the pneumatic valve stem out in pneumatic upper body, so they are called pneumatic valve stem. To facilitate the manual operation and positioning ( Stop in the designated position, often in a driven disc of the pneumatic valve stem and trapezoidal thread, and used in pneumatic valve at the top of the stem nut to convert rotary motion to the linear motion of the pneumatic valve stem, also the operating torque thrust into operation. On the manual operation of pneumatic valves, with hand wheel drive pneumatic stem nut. And on the electric pneumatic valve, made with electric device to drive the air valve stem nut.
when you start the pneumatic valve, pneumatic valve stem nut rotation movement of the pneumatic valve rod ascension along with damper to the pneumatic valve cover, the upper part of the fluid channel open. When hoisting height is equal to the pneumatic valve nominal diameter of the gate. Times, the fluid channel is completely open, pneumatic valve is equivalent to a brake pipe, which is flanged butterfly pneumatic valve in full open position. But this position under the condition of pneumatic valve operation is unable to monitor, so in actual use in pneumatic valve stem, check point on the fixed position, as a pneumatic valve in full open position. Considering the pneumatic valve lever in this position will appear because of temperature change, the phenomenon of lock, so as to affect the normal operation of the pneumatic valve, pneumatic valve so often when open after the top dead center ( Opening of an ugly back to pneumatic stem nut / - Ring, and with this as a pneumatic valve in full open position. Thus, pneumatic valve in the full open position is according to the location of the damper ( The trip to determine.