12、承压设备与安全阀之间不得装有任何阀门，对盛***、***、***或粘性介质的容器，为便于更换、清洗，可装截止阀，其结构和通径尺寸不应妨碍安全阀的正常运行。正常运行时，截止阀必须全开并加铅封。安全阀属于自动阀类，主要用于锅炉、压力容器和管道上，控制压力不超过规定值，对人身安全和设备运行起重要保护作用。R9012299773DREME10P-7X/200XYG24K31A1VR9009486213DREE10P-6X/200YG24K31VR9009545173DREE10P-6X/100YG24K31VR9009545233DREE16P-6X/200YG24K31VR9009429513DREM10P-6X/200YG24K4V-1R9009436313DREM10P-6X/315YG24K4V-1R9009645183DREM10P-6X/315YG24K4VR9007690603DREM16P-6X/250XYG24K4V-2R9009489503DREM16P-6X/200YG24K4V-1R9009491253DREM16P-6X/200XYG24K4V-1R9009504033DREM16P-6X/100YG24K4V-1R9009588613DREM16P-6X/200YG24K4VR9002443313DRE10P-6X/315YG24K4VR9009429753DRE10P-6X/200YG24K4V-1R9009430903DRE10P-6X/200XYG24K4V-1R9009503033DRE10P-6X/100YG24K4V-1)