If necessary, the stem and stem seal may be removed from the bonnet by removing the retainer ring and handle and screwing the stem out the under-side of the bonnet.

• 如果必要的话，阀杆和阀杆密封可能要从阀帽上拆卸下来，要在阀帽的下方先拆卸挡圈和手柄，以及阀座上的螺丝。