How to judge the working principle of pneumatic butterfly valve? How to adjust if the video cannot be closed properly? The pneumatic ball valves produced by Dongfeng have several shapes, including rectangular, round, square, and rectangular rounded pneumatic ball valves with full height and half height. According to the flue size, stress and strain requirements, users can select multi knots.
1. After the user selects the appropriate pneumatic ball valve according to the thermal displacement of the pipe system, at least the flow medium in the pipe, the design pressure of the flue and air duct, the * high temperature during operation, the waveform (full height 216 mm, half height 108 mm) and wave number (single wave number does not exceed 6 waves) selected for the overall dimensions (length and width) of the cross section of the flue and air duct must also be provided, To facilitate the structural design and manufacturing of pneumatic ball valves.
2. Large allowable expansion per wave: full height type α= ± 24mm half height type α= ±12mm。
3. Ash baffle: it can not be used for air duct or pipe with little dust, and it should be used for flue with much dust.
4. In order to reduce the number of wave nodes of the pipe, 50% cold drawing shall be considered.
5. The pneumatic ball valve is applicable to the occasions where the sectional area is less than 4.6 square meters and the overall dimension of the flue and air duct has one side less than 1.5 m but more than 0.6 mm.
