Hydroid – Series User Manual
23 04/19
TEMPERATURE CORRECTION FACTORS FOR MEMBRANES
A membrane’s stated PRODUCT (purified water) production rate is based on a water
temperature of 77°F. Temperature above or below 77°F will increase or decrease the
membrane’s production rate.
Find the temperature correction factor (TCF) for your water temperature on the table located
on the next page. Divide the rated PRODUCT (purified water) flow (This can be found on the
System Specification Chart on Page 20 of this manual under the maximum PRODUCT (purified
water) flow rate category) by the temperature correction factor. The result is the nominal
PRODUCT (purified water) flow rate the system should achieve at actual water temperature.
PRODUCT (purified water) flow should be within 20% of the rated production, after correcting
the feed water temperatures above or below 77°F. Check your PRODUCT (purified water) flow
meter to determine the flow rate.
Example:
Rated PRODUCT (purified water) Flowrate = 2 GPM @ 77°F
Actual Water Temperature = 55°F
Temperature Correction Factor @ 55°F = 1.541
PRODUCT (purified water) Flowrate @ 55°F = 2 GPM ÷ 1.541 = 1.297 GPM
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