Production and marketing butterfly valve, metal seal butterfly valve, high, medium and low pressure butterfly valve Cangzhou Hongyuan Pipe Co., Ltd. Contact: Wang Shan 15,922,054,164 QQ: 1494092364 E-mail: 15922054164@163.com Company Website: www.czhypipe.com/ hard seal butterfly called flap valve, the control valve is a simple structure, but also can be used for low pressure pipeline medium switch control. Hard sealing butterfly valve in the pipe from the cut off and throttling effect. The butterfly valve opening and closing member is a disc-shaped butterfly plate in the valve body around its own axis, so as to achieve the purpose of opening and closing, or adjusting. . Hard seal butterfly valve is suitable furnace, gas, steam, natural gas, city gas, hot and cold air, chemical smelting works and power generation and environmental protection systems transport all kinds of corrosive and non-corrosive fluid medium pipe is used to adjust and cut off media flow. Hard sealing butterfly valve can be divided into manual hard sealing butterfly valve, the pneumatic seal butterfly valve, electric hard sealing butterfly valve.