[span]到规定压力时不开启：造成这种情况的原因是定压不准。应重新调整弹簧的压缩量或重锤的位置；阀瓣与阀座粘住。应定期对安全阀作手动放气或放水试验；杠杆式安全阀的杠杆被卡住或重锤被移动。应重新调整重锤位置并使杠杆运动自如。[span]R900920508DBE10-5X/100YG24NK4MR90057163DBE10-5X/100YG24NZ4MR900520027DBE10-5X/100YG24Z4MR900550696DBE10-5X/100YG24Z4VR900969650DBE10-5X/200XYG24K4MR900758752DBE10-5X/200XYG24K4VR900570668DBE10-5X/200XYG24Z4MR900579169DBE10-5X/200YG24K4MR900973475DBE10-5X/200YG24K4VR900923188DBE10-5X/200YG24NK4MR900714301DBE10-5X/200YG24NK4VR900536997DBE10-5X/200YG24NZ4MR900521576DBE10-5X/200YG24Z4MR900517820DBE10-5X/200YG24Z4VR901069892DBE10-5X/315XYG24K4MR900924161DBE10-5X/315XYG24NK4MR900579202DBE10-5X/315XYG24Z4MR900916124DBE10-5X/315YG24K4MR900978551DBE10-5X/315YG24K4VR900949005DBE10-5X/315YG24NK4MR901058477DBE10-5X/315YG24NK4VR900534917DBE10-5X/315YG24NZ4M)