The method using movable metal baffle and control valve near watersealed well to block the drain of oil tank group is unreliable and it will widen flowing fire area.
用活动金属挡板及水封井附加控制阀门封闭油罐组排水沟的方法既不可靠又会使流淌火面积扩大。
2
Though there is no condensate water that uses ball-type sealed lever to make the valve clack tightly adhesion to the valve seat, it can prevent the fresh vapor from leakage.