Unscrew packing gland (9) from the bonnet (2) using a 24ln pipe wrench. NOTE ensure the threads on the bonnet (2) are not damaged by the pipe wrench.

• 用24"管钳从阀罩(2)上拧下盘根压帽(9).；注意不要让管钳伤到阀罩(2)上的丝扣