Fire Butterfly groove between the United states and Germany are the introduction of similar design and manufacture of advanced products and a series of new connection valve. It has installed Express,simple, safe, reliable, not subiect to restrictions on the installation site, piping and valves to facilitate maintenance, noise and vibration have acertain perspective of the scope has to overcome the pipeline to connect the different axis arising from poor imition to solve the temperature difference expand with heat and contrad with cold have advantages. Widely used in transmission fluid to the drainage pipes, fire, air-conditioning, gas, petroleum, chemicals, water treatment, municipal, pipeline engineering and ship building role as the control fluid.