Pneumatic valve installation has direction

Principle of pneumatic valve: the valve is to rely on the working principle of rotary valve love to keep the valve open or closed. A perforated channels, perpendicular to the axis of rotation of the channel, so as to achieve the aim of opening and closing the channel comparative advantages and disadvantages of pneumatic valves and other valves: valve switch light, small volume; Defect is turned on or off too fast, middle water hammer in pipe ( The pipe flow speed suddenly change when the pressure rises) 。 Classification of pneumatic valve: the valve can be divided into: the form of the structure of floating valve, a fixed valve, flexible valve and oil seal valve; Can according to the channel can be divided into straight type, Angle type and three general formula, etc. , can be divided into the t-shaped and l-shaped three-pass two kinds. According to the connection mode can be divided into the thread type connection, flange connection and welding type 3 kinds. Pneumatic valve application example: valve with type O and V valves. O type valve structure of floating type, flow crossing the same as the pipe diameter, flow capacity, little flow resistance, closing without leakage, generally do switch valve is used, especially suitable for high viscosity, fiber, granular media; V valve adopts fixed structure, core on a v-shaped incision, which can realize proportional control, flow characteristic is approximate equal percentage. Process equipment under different choice of pneumatic or electric actuators, respectively of pneumatic valve and electric valve, pneumatic valve such as must be regulated to achieve proportional valve positioner, such as the electric valve must be regulated to achieve proportional election electronic electric actuators or servo amplifier, etc. Pneumatic valve installation: A, not limited by the installation direction, the flow of medium can be arbitrary. B, to leave the position of the valve handle rotation. C, belt transmission mechanism of the valve should be installed upright. Pneumatic valve note: cannot be used for throttling.