燃气安全阀的结构与原理：图a为活塞式安全阀，阀芯是一平板。气源压力作用在活塞A上，当压力超过由弹簧力确定的安全值时，活塞A被顶开，一部分压缩空气即从阀口排入大气；当气源压力低于安全值时，弹簧驱动活塞下移，关闭阀口AH42F燃气安全阀产品广泛应用于市政建设、农田、燃气、水利、火力发电、石油化工、冶金矿山、消防环保、食品、航运、医药和轻纺等各个领域。AH42F、A42F适用于工作温度在-40～80℃的液化***的液相出口管上，当进出口压差0.5MPa时液化***能自动回流入罐。主要零件材料：NO.零件名称AH42F-CA42F-C材料1阀座2Cr132阀体WCB3调节圈2Cr134反冲盘2Cr135阀瓣2Cr13+PTFE6导向套2Cr137阀盖ZG230-4508弹簧50CrVA9阀杆2Cr1310调整螺杆4511阀帽ZG200-400AH42F-40201510525515516244-142511585651624-1411095378A42F-40251611585586516244-1432140100781824-18110953783220140100667818244-1840150110851834-181151003784025150110768518344-18501651251002034-1812011040650321651258810020344-18651851451202034-18135120450654018514511012022348-18802001601352038-18160140520805020016012113522348-181002201801552238-18170135525100652351901501602434.58-231252502101852238-18195175690125802702201761882834.58-261502852402102438-232101907801501003002502042183034.58-261753102702402638-232552308382001253753202602823834.512-3025040535532030312-263002609922501504503853133454234.512-3430046041037530412-263503201266阀门型号编制方法http:///News/T2/ml氧气截止阀http:///Products/T118/ml)