Site Map Email Us  
 
   
 
A.S.T.M Standard Viscosity Temperature Chart
*For viscosities less than 35 SSU use 35 SSU in sizing the heat exchanger
 
Fin-Cool® Air Static Pressure Drop - 12 FPI


Hose Diameter vs. Fluid Flow





Hose I.D. (inches) Flow - Return Line (GPM) Flow - Pressure Line (GPM)
½ 2 - 3 5 - 8
¾ 4 - 6 10 - 20
1 8 - 12 10 - 35
1 ¼ 12 - 20 30 - 55
1 ½ 20 - 30 45 - 90
2 35 - 60 75 - 150
 

 

 Conversion Factors & Formulas
 
STEP 1:

To convert to the desired units, go to the appropriate table.
STEP 2:

Go to the column of known units down to the cell with a one (1).

STEP 3:

Go across to the column of the desired units.

STEP 4:

Multiply known units by this factor to obtain the number with the desired units.
 
  Example: Convert energy of 15 kW to BTU/Hr
 
  Example: Convert energy of 15 km to BTU/Hr

Energy		  
Step1
BTU/Hr HP Ft-Lbf/Sec Kilowatt(kw)
1 3.929 X 10-4 0.2161 2.930 X 10-4
2545 1 550 0.7457
4.6272 1.818 X 10-3 1 1.356 X 10-3
3413 1.341 737.6 1
Step2
 
Step3
  
 
  Flow(GPM) X Pressure(PSI)
HP = ---------------------------------------------------------------
  1714
 
Velocity
SSU Feet2 /Sec Meter2 /Sec Centistoke
1 2.32 X 10-6 2.16 X 10-7 0.216
4.31 X 10-4 1 9.29 X 10-2 9.29 X 104
4.635 x 10-5 10.76 1 1 x 106
4.635 1.076 x 10-5 1 x 10-6 1

Pressure
PSI Inches H2O cm Hg kPa (kN/Meter2 )
1 27.68 5.171 6.895
3.613 X 10-2 1 0.1868 0.249
0.1934 5.353 1 1.333
0.145 4.015 0.75 1

Temperature

Fahrenheit (°F) Celsius (°C)
1 5/9 (°F - 32)
9/5 (°C) + 32 1

Fluid Factor

Fluid Fluid Factor
Oil 210
Air 1.10*
Water 500
Water/Glycol (50/50) 440
To determine temperature change of fluid through heat exchanger:
  HEat Transfer (BTU/Hr)
T (°F) = ---------------------------------------------------------------
  Fluid Factor*Flow (GPM)

*Use flow in CFM

Flow
Gallons/Min (GPM) Feet3 /Min (CFM) Inches 3/Sec (CIS) Liters/Min
1 1 3.85 3.785
7.48 3.472 x 10-2 28.8 28.31
0.26 3.531 x 10-2 1 0.983
0.2642 0.134 1.017 1
Volume
Gallons Feet3 Inches 3 Liters
1 0.134 231 3.785
7.48 1 1728 28.31
4.33 x 10-3 5.787 x 10-4 1 1.64 x 10 -2
0.2642 3.531 X 10-2 61.02 1
Length
Inches (in) Feet (ft) Centimeters (cm) Meters (m)
1 8.333 x 10-2 2.54 2.540 x 10-2
12 1 30.48 0.3048
0.3937

3.281 x 10-2

 1 1 x 10-2
39.37 3.281 100 1

Air Velocity & Air Flow

To determine air velocity in Feet/Minute (FPM) through the heat exchanger from known air flow in Feet3/ Minute (CFM):
  Air Flow (CFM)
Air Velocity(FPM) = ---------------------------------------------------------------
  Heat Exchanger Finned Core Area (Feet2)

Altitude Adjustment

Performance Curves are based on sea-level conditions. Derate heat transfer performance for tube and fin heat exchangers by 2.5% for every 1000-foot gain in altitude.

Helpful Hint

3.5 BTU/Hr are required to raise one gallon of oil 1 in 10 F hour.

 
© Copyright 2006 Hayden Industrial Products, A Division of Hayden Products LLC. All rights reserved. Site created by NDIC