The electric butterfly valves produced by Dongfeng have several shapes, rectangular, round, square, rectangular round angle electric butterfly valves have full height, half height, according to the flue size, stress and strain requirements, users can choose multi knots.
1. After the user has selected a suitable electric butterfly valve according to the thermal displacement of the pipe system, at least the flow medium in the pipe, the design pressure of the flue gas 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 gas duct must also be provided, In order to design and manufacture the structure of electric butterfly 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 butterfly valve is applicable to situations 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.