By opening a high degree of safety valve can be divided into different Weiqi Kai-all-and, Weiqi-security law for liquids occasions, the entire Kai-security law for gas or steam media occasions.

• 安全阀按开启高度的不同可分为微启式和全启式，微启式安全法用于液体介质场合，全启式安全法用于气体或蒸汽介质场合。