六机部第九设计研究院、上海江南造船厂、沪东造船厂等单位在建材部山东工业陶瓷研究所和上海第五焊接厂的协作下,研制成功一种 SA-Y1型干式乙炔回火防止器,见图1。这种回火防止器系中压岗位式,适用于金属气焊、气割和火焰热加工等作业。 该回火防止器具有下列四种作用: 1.熄火 Sixth Machine Design Institute of the ninth, Shanghai Jiangnan Shipyard, Hudong Shipyard and other units in the building materials Department of Shandong Institute of Ceramics and Fifth Shanghai Welding Factory in collaboration with the successful development of a SA-Y1-type dry acetylene back Fire prevention device, see Figure 1. This type of tempering preventer is a medium pressure post type for metal gas welding, gas cutting and flame thermal processing operations. The tempering preventer has the following four functions: 1. Turn off the flame