Valve unit rectangular

Figures 6.3 and 6.4 show different types of valve trays and valve units. Valves can be round or rectangular, with or without a caging structure. A detailed description is available elsewhere (1), and in manufacturers literature (7-9). The valve disks rise as vapor rate is increased (Fig. 6.2c), The upper limit of opening is controlled by a caging structure or by restrictive legs at the bottom of the valve unit. As vapor rate falls, the disk openings are reduced, or they may settle intermittently over the holes. This stops the liquid from...

Figure 6.4 Types of valve units, (a) An uncaged, mind valve unit. (6) A caged, round valve unit, (c) A caged, round valve unit featuring contoured orifice, fd) A rectangular valve unit it) A futed, round valve unit, if) A fixed, triangular v hre unit, (forts a and e courtesy of Gtiisch Inej parts b, c and f courtesy of Koch Engineering Company, Inc. pari d courtesy of Nutter Engineering.)...

FIGURE 4.75 Rectangular flotation unit with recycle pressurization (1) flash mixing and flocculation, (2) float discharge line, (3) float beach, (4) skimmer, (5) adjustable effluent weir, (6) effluent line, (7) recycled effluent, (8) recycle pump, (9) air-saturation tank, (10) air controls, (11) pressure-reduction valve, (12) settled solids removal and bottom solids discharge line, (13) influent and recycle blending and distribution system, and (14) influent. (Envirex.)... 

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