Flue gas baffle doors, like baffle doors, are mainly used in the flue gas desulfurization systems of thermal power plants to prevent the flow of flue gas. It is mainly used in smoke and air ducts with relatively high isolation requirements for operation. Designed with zero leakage both inside and out. The sliding door adopts a double-layer sealing structure of wedge-shaped contact type soft seal and rhombic or planar composite hard seal. It is a single-layer baffle door and does not require a sealing air system. The designed sealing efficiency is no less than 99.5%. The sliding door has multiple functions such as full opening, full closing and adjustment, and features a sliding opening and closing structure. Flue gas plug door not only use in the desulfurization system, can also be used in strict isolation of cases, the selection and ordering, should provide the relevant data and requirements for manufacturers, and related technical information was obtained from the factory according to plug door use and location in the pipeline, choose different structure form and seal form, and provide use. When ordering flue gas plug door should be provided under items: plug door size, round (or other) nominal diameter, rectangular (length x width x thick installation distance, need to offer the axis) installation location: (horizontal flue vertical, horizontal flue installed side, vertical flue level) connected to the flue form: (flange connection flange, old must provide the original data, welding flange connection) drive form: electric, pneumatic, hydraulic, hand wheel, the turbine; Allow the leakage or sealing efficiency: (0% ~ 0.5% = 100% ~ 99.5%) or less or less working medium: flue gas composition; Work pressure (P):Pa; Operating temperature (t):℃ Material: flue gas corrosion. (carbon steel, stainless steel, carbon steel stainless steel coating) electric control requirements; Voltage, current. Other special requirement: pointed out alone. As defined by the desulfurization system design factory smoke wind pipe nominal diameter specifications and manufacturing supply. We are now offering 10 specifications. Specifications outside the series can be designed and ordered according to the requirements of the buyer.