Flue check valve, also known as reflux valve, check valve, back pressure valve, check valve. The type of valve is the force generated by the flow of the medium itself rely on piping and automatic opening and closing, is an automatic valve. The check valves used in piping systems, whose primary role is to prevent the media back to the pipeline can be applied to a variety of media. Check valve installed in the pipeline to become one of the wetted parts of the complete piping, flue valve, also known as the interior wall hood. The Ministry of Construction to promote environmentally friendly products in modern housing construction has been widely applications. Generation of flue check valve to the new high-end residential, to solve a big problem. It can not only prevent smoke backflow, but also play the role of pipe connections. 
 Product Description ? 
 Flue check valve in your family's security guards, it can effectively prevent the people in public in the flue discharge toxic emissions and smoke intrusion into their own home, but can also prevent mosquitoes, moths, flies, flies, and geckos such as reptiles into the home, the most important thing is that it can ensure that your family inside air health, safety. 
 Flue check valve 
 Diameter: 150mm 
 Material: stainless iron 
 Principle: the valve principle of gravity 
 Effect: good 
 Features: convenient and flexible, inexpensive, classic fashion