止回阀 ARMGIDROPROM SCH20，HSHG，GGG40，GGG50等。

止回阀 被设计成安装在管道上作为防止工作介质沿相反方向流动的安全装置。 工作介质: 水、蒸汽、油、石油产品、气态介质和其他爆炸性和化学介质相对于阀门的主要部件中性。

模型: 铸铁:SCH20,VChShG,GGG40,GGG50.19H19R,19h19br,19H21R,19H21R,19h24r,19H24R,19H22R,19nzh70nzh,19s70nzh,19h25nzh19s38nzh,19ls38nzh,19nzh38r,19ls38r,19nzh38r,19S76NZH,19ls76nzh,19nzh76nzh,19s53nzh,19ls53nzh,19nzh53nzh,19s47nzh,19ls47nzh,19nzh47nzh,19s49nzh,19ls49nzh,19nzh49nzh,19nzh49nzh,19S11NZH,19LS11NZH,19NZH11NZH,19s16nzh,19ls16nzh,19s10nzh,19ls10nzh,19nzh10nzh,19ls10bk,19s20nzh,19ls20nzh,19ls20nzh,19nzh20nzh,16s48nzh,16ls48nzh,16NZH48NZH,16s10p,16ls10p,16nzh10p,16s10nzh,16ls10nzh,16nzh10nzh,16ch42r,16s42r,16nzh42r16s13nzh,16ls13nzh,16nzh13nzh，16nzh13p。