| 摘要 |
Ball valves are disclosed that are particularly adapted for constructions where their ports are to have conduit ends connected thereto by soldering, brazing, or welding. For such uses, the sealing means of the valves are protected by a heat-dissipating fin arrangement. The valve bodies preferably consist of sleeve-like members with port members threaded into the ends thereof. The bore through each sleeve-like member is eccentric enabling it to have minimum cross-sectional dimensions with its thickest part providing adequate stock for the support of the operating means which preferably consist of a key on a stem insertable through a slot in the bottom of the bonnet into a keyway in the ball valve element and seating the stem when the key is caught under the bottom of the bonnet.
|
