Page 140 - Applied Process Design For Chemical And Petrochemical Plants Volume II
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Distillation 129
Figure 8-73A. Type “T” Flexitray@. Used by permission, Koch Engi-
neering Co. Inc.
Figure 8-718. Nutter LVGTM long, SVGTM short, and MVGTM tray
slots. MVGTM tray slots are always placed in a triangular pattern.
Used by permission, Nutter Engineering, Harsco Corp.
Figure 8-738. Type “A” Flexitray@ with double pass. Used by per-
mission, Koch Engineering Co., Inc.
A Standard valve with integral legs used for most services,
utilizing a sharp-edged orifice in the tray floor.
& Same “A valve, but with a contoured hole in the tray
floor for lower operating pressure drop.
T Round valve retained by a fixed holddown and a sharp-
edged hole in the tray floor for all services, including foul-
ing, slurry and corrosive applications.
To The same “T” valve and holddown with a contoured, low-
pressure drop hole in the tray floor.
S Stationary valve punched up from the tray floor.
The A, &, T and To valves can be supplied either with a
flat periphery for tightest shutoff against liquid weepage
at turndown rates or with a three-dimpled periphery to
minimize contact with the tray deck for fouling or corrosive
conditions.
Figure 8-72. Types of standard Koch valves. Used by permission,
Koch Engineering Co., Inc., Bul. KT-6A.
