本阀门适用于工作温度≤350℃的蒸汽、水等介质的设备和管路上。作为超压保护装置。连接法兰标准按JB/T......94的系列 ,主要零部件材料说明：A38Y、A43H、A37H型安全阀除三通（材料为WCB）外，欺余零件的材料均和A47H、A48Y型弹簧式安全阀相同。 A38Y、A43H、A37H型双联安全阀是在Y型接头上装设两个同样规格的A48Y或A47H型安全阀而构成，其公称通径系列指Y型接头进口通径其组合情况如下表：A38Y型相应的A48Y型5032×28050×210065×2150100×2 A43Y型相应的A47Y型5032×28050×210080×2125100×2150125×2 A37Y型相应的A47Y型5032×28065×210080×2125100×2150125×2 ■主要外形尺寸：型号公称通径doDKgg1bff1Z-?dDN’D1K1g2b1f’Z1-?d1LL1L0hHA37H-16C A43H-16C5025165125100/203/4-1832140100781824-181151101652355478040200160135/203/8-18501651251001634-181351201902857958050200160135/203/8-18651851451201834-1814013020531083510065220180155/223/8-18802001601352038-1816013525535589012580250210185/223/8-181002201801552238-181701602604101170150100285240210/243/8-231252502101852238-181901902754301240A37H-25 A43H-255025165125100/203/4-1832140100781824-181151101652355478040200160135/223/8-18501651251001634-181351201902857958050200160135/223/8-18651851451201834-1814013020531083510065230190160/243/8-23802001601352038-1816013525535589012580270220188/283/8-261002201801552238-181701602604101170150100300250218/303/8-261252502101852238-181901902754301240A37H-40 A43H-4050251651251008820344-1832140100781624-18115110165235547804020016013512122348-18501651251001634-18135120190285795805020016013512122348-18651851451201834-18140130205310835100652351901601502434.58-23802001601352038-18160135255355890125802702201881762834.58-261002201801552238-1817016026041011701501003002502182043034.58-261252502101852238-181901902754301240A38Y-16C5020165125100/203/4-1840150110851634-181981001652256368032200160135/203/8-18651851451202034-1823012019026581710040220180155/223/8-18802001601352038-1829314026526592115080285240210/243/8-231252502101852238-183201752504201097A38Y-255020165125100/203/4-1840150110851634-181981001652256368032200160135/223/8-18651851451202034-1823012019026581710040230190160/243/8-23802001601352038-1829314026526592115080300250218/303/8-261252502101852238-183201752504201097A38Y-4050201651251008820344-1840150110851634-18198100165225636803220016013512122348-18651851451202034-18230120190265817100402351901601502434.58-23802001601352038-18293140265265921150803002502182043034.58-261252502101852238-183201752504201097 ■安装说明：①各种安全阀及双联弹簧式安全阀都应垂直安装。
②双联弹簧式安全阀出口处应无阻力，避免产生受压现象。
③双联弹簧式安全阀在安装前应专门测试，并检查其官密封性。
④对使用中的双联弹簧式安全阀应作定期检查。