Abstract: The collar of a one piece liner for a gate of a gate valve includes inwardly sloping entry surfaces for urging packing compressed by a packing gland against the gate to effect a seal about the gate without an increase of packing gland pressure. Bead seals disposed upon the inwardly sloping surfaces cooperate with the packing to prevent leakage intermediate the sloping surfaces and the packing. Further bead seals extending about the interior of the throat of the chest bear against the gate to serve a sealing function and to discourage migration of the packing into the throat.

Abstract: A dual legged pedestal extending upwardly from the chest of a gate valve rotatably supports a pinion gear. The pinion gear, including a shaft having one end extending penetrably lateral to a leg of the pedestal, is in mesh with a rack affixed to the top of the rectilinearly translatable gate. A detachable tool is engageable with the extending end of the shaft for imparting rotary motion thereto resulting in translation of the rack. A combined spacer and thrust member adds rigidity to the legs of the pedestal and maintains the rack in mesh with the pinion gear.