Abstract: A static mixing device subassembly that can be joined with other static mixing device subassemblies to form a static mixing device. The subassembly comprises a first pair of intersecting grids of spaced-apart and parallel deflector blades and a second pair of intersecting grids of spaced-apart and parallel deflector blades. The deflector blades in each one of the grids are interleaved with the deflector blades in the paired intersecting grid and have uncut side portions that join them together along a transverse strip where the deflector blades cross each other and cut side portions that extend from the uncut side portions to the ends of the deflector blades. Each of the deflector blades in one of the grids in each pair of grids has a bent portion that places segments of the deflector blade on opposite sides of the uncut portion in offset parallel planes.

Abstract: A valve contact tray for use in a mass transfer or heat exchange column and having a plurality of fixed or moveable valves distributed across a tray deck of the contact tray. Each of the valves includes an opening in the tray deck, a valve cover connected to attachment legs, and a weir surrounding the opening. The valve cover is wider than and extends outwardly beyond the underlying opening in the tray deck and has a perimeter region that extends downwardly. A louvered vent opening may be provided in a downstream one of the attachment legs.

Abstract: A static mixing device subassembly that can be joined with other static mixing device subassemblies to form a static mixing device. The subassembly comprises a first pair of intersecting grids of spaced-apart and parallel deflector blades and a second pair of intersecting grids of spaced-apart and parallel deflector blades. The deflector blades in each one of the grids are interleaved with the deflector blades in the paired intersecting grid and have uncut side portions that join them together along a transverse strip where the deflector blades cross each other and cut side portions that extend from the uncut side portions to the ends of the deflector blades. Each of the deflector blades in one of the grids in each pair of grids has a bent portion that places segments of the deflector blade on opposite sides of the uncut portion in offset parallel planes.

Abstract: A valve contact tray for use in a mass transfer or heat exchange column and having a plurality of fixed or moveable valves distributed across a tray deck of the contact tray. Each of the valves includes an opening in the tray deck, a valve cover connected to attachment legs, and a weir surrounding the opening. The valve cover is wider than and extends outwardly beyond the underlying opening in the tray deck and has a perimeter region that extends downwardly. A louvered vent opening may be provided in a downstream one of the attachment legs.