초록 ▼

A gate valve structure having a pair of opposed spacer carriers (72,74) fitting within the valve chamber in abutting relation to each other and spacing the floating upstream and downstream seats (60, 62) from each other a predetermined minimum distance. Each carrier (72, 74) has an annular base (76)

A gate valve structure having a pair of opposed spacer carriers (72,74) fitting within the valve chamber in abutting relation to each other and spacing the floating upstream and downstream seats (60, 62) from each other a predetermined minimum distance. Each carrier (72, 74) has an annular base (76) adjacent one of the flow passages and a pair of spacers or guides (78, 80) secured to the base and extending from the base (76) in a direction axially of the flow passage. The spacers (78, 80) on opposed carriers are in abutting relation to each other and form a smooth continuation. An expanding gate assembly (28) fits between the spacers and moves between open and closed positions relative to the flow passages.

대표청구항 ▼

A gate valve structure comprising: a valve body having a valve chamber therein and axially aligned upstream and downstream flow passages communicating with the valve chamber; a bonnet detachably connected to an upper end of the valve body over the valve chamber and permitting access to the valve cha

A gate valve structure comprising: a valve body having a valve chamber therein and axially aligned upstream and downstream flow passages communicating with the valve chamber; a bonnet detachably connected to an upper end of the valve body over the valve chamber and permitting access to the valve chamber when removed; a pair of opposed spacer carriers fitting within the valve chamber, one of the carriers being positioned adjacent the upstream flow passage and the other carrier being positioned adjacent the downstream flow passage, each spacer carrier including an annular base ring in alignment with the associated flow passage and a pair of generally parallel spacers extending from the ring in a direction axially of the flow passages, the spacers on one of said opposed carriers being aligned with and in abutting relation to the spacers on the other of said opposed carriers; a gate mounted between the spacers for movement between open and closed positions; and an annular seat around each of the flow passages between the valve body and adjacent spacer carrier for sealing against the gate in the closed position thereof, the seats being spaced from each other by said spacer carriers a predetermined minimum distance.