Patent ID: 9453578
Filing Date: 2016-09-27
CPC Classification: F16K

Claim Text:
1. A gate valve assembly comprising: an upstream sealing valve body having a channel extending from a distal end of the valve body to a proximal end of the valve body; a gate configured to be moved from a first position to a second position, the second position being when the gate is positioned in the channel between the distal end and the proximal end; at least one seat insert configured to be threaded into a pocket of the valve body; a seat configured to be positioned within the seat insert; a trash ring, including a plurality of holes, positioned within a first groove of the seat insert and the seat; and a seal within a second groove of the seat insert positioned between the valve body and the seat insert, wherein the seal is a fixed static seal providing no gaps between the seat insert and the valve body allowing no debris to corrupt the seal; wherein a disc spring, positioned between the seat and the seat insert, is configured to flex and seal the seat against the gate when valve body pressure in the valve body is lower than a channel pressure in the channel.