弹簧式安全阀,按其阀盘升启高度的不同又可分为Spring type safety valve, according to the diff
erent lifting height of the valve disc can be divided 全启式 开启高度一般为阀通径的1/4~1/3The full opening height is usually 1/4 ~ 1/3 of the valve size 微启式 开启高度一般为阀通径的1/4~1/40Micro-open opening height is usually 1/4 ~ 1/40 of the valve size