Fisher ™ Material of Fisher 119 switch over valve:Threaded NPT cast iron body with aluminum spring case, bonnet, seat ring and disk holder. Nitrile (NBR) disk and O-ring. Nitrile (NBR) diaphragm. Approximate shipping weight is 7 pounds.Type 119EZ comes with 1 NPT. Opening speed adjustment with integrated check valve to allow for quick closing speed.

Model 119 switching valve is used for switching or throttling control of non corrosive or slightly corrosive gases. Its design meets the requirements of low pressure gas applications in many industries. 119ez and 119ezs are used as fuel gas valves for natural draft burners of oil and natural gas. The product has a built-in speed controller, which can adjust the opening speed to ensure the correct ignition in the main burner.

Fisher™费希尔119型切换阀材质：螺纹NPT铸铁阀体，带铝弹簧盒，阀盖、阀座环和阀瓣固定器。丁腈橡胶盘和O形圈。丁腈橡胶（NBR）隔膜。大约装运体重是7磅。119EZ型配有1 NPT。开启速度调节与综合止回阀，以允许快速关闭速度。

119 型切换阀用于非腐蚀性或轻微腐蚀性气体的开关或节流控制。 其设计符合多种行业的低压气体应用要求。 119EZ 和 119EZS 用作石油及天然气自然通风燃烧器的燃料气阀门。 产品带有内置的速度控制器可调节开启速度，确保主燃烧器中实现正确的点火。

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