The electric ball valves produced by Dongfeng have several shapes, including rectangular, round, square, and rectangular round corner electric 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 electric 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, In order to design and manufacture the structure of electric ball valve.
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 electric ball valve is applicable to the occasions where the sectional area is less than 4.6 square meters and one side of the overall dimension of the flue is less than 1.5 m but more than 0.6 mm.