风道调节阀、风道止回阀。风道密闭阀的作用是在管道中隔断或切断气流。隔断气流时要求阀门内泄露为零，切断气流时则允许有一定的泄漏量。风道调节阀的作用是在通风系统中起平衡流量调节作用，例如维持个系统之间的压力、各厂房内的温度和湿度等，为了达到此目的我们需要根据起流量特性对风道调节阀进行控制。通风蝶阀为风道密闭阀，近年来随着工农业的发展而应用较多。为此，我厂工程技术人员开发设计了的不同规格的系列蝶阀供用户选择。
The air channel valve of a ventilating system covers air channel closing valve air channel adiusting valve and air channel check valve which are of different actions The action of the air channel closing valve comes at cutting offor isolating the airfIow inside of the Pipeline with the inte rnalleak of the valve required to be ze ro at isoIating the airflow while a certain leakage allowed at cutting off the airfIow The air channel adiusting valve acts at flow balance adiusting in the ventilating system，such as to keep the Pressure between the svstems and the temperature and humidifv inside of the factorv house，and，to qet this Purpose，the valve needs to be controlledupon the flowproperty The ventilating butterfly valve is to be the air channel closing valve and much more applied along with the development of both indusfry and agriculture in the recent years The refore the technicians in this Co have designed and developed series butterfly valves in different specifications for users to select.

型号：D941W-0.1C、QD941W-0.1C

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