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* Heat exchangers with marine waterboxes have heavier dry and operating weights than heat exchangers
with nozzle-in-head waterboxes.
Table 14 — Marine Waterbox Cover Weights*
Heat Exchanger Size
Design Maximum
Water Pressure
Cooler Condenser
psi kPa lb kg lb kg
41 – 48
150 1034 2236 1015 1275 579
300 2068 3060 1389 1660 754
51 – 57
150 1034 – – 1643 746
300 2068 – – 2243 1018