Patent ID: 6591869
Filing Date: 2003-07-15
Classification: E21B,F16K,Y10T

Abstract:
A gate valve assembly which comprises:an elongated body having a longitudinal bore extending therethrough; a plurality of gates slidably disposed in the longitudinal bore across respective flow passages which each extend laterally through the body between corresponding inlet and outlet ports; each gate being movable between an open position wherein an opening in the gate is aligned with its respective flow passage and a closed position wherein the opening is offset from its respective flow passage; actuator means for moving the gates simultaneously between a first position, wherein at least one of the gates is in its open position, and a second position, wherein the at least one gate is in its closed position; each gate being disposed between first and second seats, each of which comprises a through bore that aligns with the flow passage; the first seat being positioned between the body and the gate; and the second seat being rigidly attached to a plug member which is secured over a transverse bore that is formed in the body concentrically with the flow passage.