To size your production machine cooling load use the following
information: Calculate the total lbs/hour of material your
machine uses and divide it by the lbs/ton listed below for
your specific process. This will give you the tons of cooling required
at 50° F leaving water temperature.
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INJECTION MOLDING = 1 LBS/TON
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EXTRUSION = 1 LBS/TON
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30 lbs/hour HDPE
35 lbs/hour LDPE
35 lbs/hour Acrylic
35 lbs/hour PP
40 lbs/hour Nylon
40 lbs/hour Derlin
40 lbs/hour Urethane
45 lbs/hour PET
50 lbs/hour PS
50 lbs/hour ABS
50 lbs/hour PC
50 lbs/hour Acetal
70 lbs/hour PVC
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SHEET CALENDERING
35 lbs/hour PE
60 lbs/hour ABS
60 lbs/hour PS
PROFILE
50 - 60 lbs/hour HDPE
50 - 60 lbs/hour LDPE
50 - 60 lbs/hour PP
50 - 60 lbs/hour PET
60 - 75 lbs/hour ABS
60 - 75 lbs/hour PVC
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FEED THROAT:
1/2 ton up to 400 ton injection.
1 ton over 400 ton injection.
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Barrel = 1 ton/" screw dia
Screw = 2 tons
Throat = 1/2 ton up to 3"
Throat = 1 ton 4" to 6"
Gear drive = 100 hp/ton
(oil cooling)
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BLOW HOLDING = 1 TON
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VACUUM FORMING = 1 TON
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40 lbs/hour HDPE
40 lbs/hour PET
40 lbs/hour PVC
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70 lbs/hour HDPE & LDPE
70 lbs/hour PP
200 lbs/hour PS
250 lbs/hour PVC
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HOT RUNNER MOLDS convert heater watts to btu's and
divide by 2. (watts x 3.414 divide by 24,000 Btu's)
MOTOR COOLING LOAD FOR PORTABLE CHILLERS
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Hydraulic cooling:
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8 hp = 1 ton
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Vacuum pumps:
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8 hp = 1 ton
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Air compressors:
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8 hp = 1 ton (internal oil cooling).
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8 hp = 1 ton (after cooler cooling).
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Chilled water flow rate is 2.4 gpm/ton.
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Chiller ton is 12,000 Btu's
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Chiller operating temperature range with water is from 45°
F. to 60° F. leaving water
temperature.
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Chiller operating temperature range with glycol/water is
from 25 F. to 45° F. leaving
water temperature.
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Cooling
Load Sizing 
