Provides eight positions whereby a keyed or combination padlock can be used to lock the gear operator into position to prevent accidental or deliberate tampering with valve posture.

• 具有八个位置,据此一把钥匙或数码锁可以用来将齿轮操作机构锁定在某个开启位置上,防止阀门开启位置受到意外或故意的破坏。