Pressure Vessel Engineering Manual - Evapco

Vertical Surge Drums 250# DWP
Mounting Clips
(Typ. 2 Places)
Notes: All dimensions are given in inches.
Surge volume calculated between 6" OPL and HLCO 6" below suction inlet elbow.
Consult factory for certified drawings.
Vertical Surge Drum Capacity–Tons of Refrigeration R-717
Evaporator Temperature °F
Single Stage* Two Stage*
Model No. 30°F 20°F 10°F 0°F -10°F -20°F -20°F -30°F -40°F -50°F
VSD12-48 35 32 29 25 22 19 23 19 16 14
VSD16-54 64 58 52 46 40 35 41 35 30 25
VSD20-60 101 92 83 73 64 56 66 56 47 40
VSD24-60 147 135 120 107 93 82 96 82 70 59
VSD30-72 232 212 189 168 147 129 152 130 111 94
VSD36-78 333 305 271 242 211 185 218 187 159 135
VSD42-84 452 415 369 329 287 252 296 254 217 184
* Single stage capacities based on +96°F liquid supply temperature.
** Two stage capacities based on +25°F liquid supply temperature.
C B
A B C D E F G H J (Ft 3 ) (lbs.)
Overall Shell Suction Gas Liquid Liquid Level Surge Vessel
Model No. Diameter Length Length Inlet Outlet Outlet Make-Up Column Relief Volume Weight
VSD12-48 12 48 37 2-1/2 2 2-1/2 3/4 1-1/2 1-1/2 1.3 250
VSD16-54 16 54 41 3 2-1/2 3 3/4 1-1/2 1-1/2 2.8 370
VSD20-60 20 60 45 4 3 4 1 1-1/2 1-1/2 5.1 525
VSD24-60 24 60 43-1/2 5 4 5 1-1/4 1-1/2 1-1/2 6.8 600
VSD30-72 30 72 53 6 4 6 1-1/2 1-1/2 1-1/2 14 935
VSD36-78 36 78 56 8 5 8 2 1-1/2 1-1/2 22 1,200
VSD42-84 42 84 59 8 6 8 2 1-1/2 1-1/2 30 1,560
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