Abstract: A valve comprising a slidable internal shuttle that is shiftable between a valve closed and a valve open configuration is provided. The valve can be configured so that minimal force is required to effect shifting of the shuttle, even though the valve can be of a large diameter. In the valve closed configuration, the shuttle blocks communication between the valve inlet and outlet. Sliding of the shuttle to the valve open configuration permits fluid to flow through the valve. The shuttle can be configured with internal surfaces that provide some or no biasing forces acting upon the shuttle in the valve closed direction.

Abstract: A passive explosion isolation valve (10) is provided that comprises vertically-oriented gate members (40, 42) configured to close automatically in response to an energetic event occurring downstream of the valve. The valve (10) may be optionally equipped with a valve seat cleaning assembly (46) configured to removed accumulated particulate material away from the area of the valve seat (48) and/or one or more latch assemblies (44) configured to secure the gate members (40, 42) in the closed position following closure of the valve (10) in response to an energetic event.

Abstract: A passive explosion isolation valve (10) is provided that comprises vertically-oriented gate members (40, 42) configured to close automatically in response to an energetic event occurring downstream of the valve. The valve (10) may be optionally equipped with a valve seat cleaning assembly (46) configured to removed accumulated particulate material away from the area of the valve seat (48) and/or one or more latch assemblies (44) configured to secure the gate members (40, 42) in the closed position following closure of the valve (10) in response to an energetic event.