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ROTRON Regenerative Blowers

PRP195 & PRP230 Application Engineering BasicsThroughout our catalog, you will find terminology used for air moving selection and product sizing. Below are a few of the key terms:

Flow Volume Rate/Time Rotron charts are in SCFM, m3/min, or L/S SCFM = Standard Cubic Feet Per Minute (American) where temperature = 68F, air density = 0.075 lb/cubic foot, and altitude = 0 feet above sea level M3/min = Cubic Meters Per Minute (Metric) L/sec = Liters Per Second (Metric) 1 m3/min = 35.3 SCFM 1 L/sec = 2.119 SCFM See Standard Engineering Conversions for other flows on pg. I-2

Specific Gravity Density Ratio Relative to Air Standard Air SG = 1.0 Methane SG = 0.55 See Specific Gravity Chart for other gases on pg. I-4

Velocity Distance/Time or Flow/Area FPM = Feet Per Minute (American) MPH = Miles Per Hour (American) M/min = Meters Per Minute (Metric) Km/h = Kilometers Per Hour (Metric) 88 FPM = 1 MPH 26.82 M/min = 1 MPH 1.609 Km/h = 1 MPH See Standard Engineering Conversion Chart for other velocities on pg. I-2 See Orifice Flow Calculation Chart for air flow equations on pg. I-7

Pressure Force/Area Rotron charts are in IWG, PSIG, MM of Water, IHG, or mbar IWG = Inches of Water Gauge (American) PSIG = Pounds Per Square Inch Gauge (American) MM of Water = Millimeter of Water Gauge (Metric) IHG = Inches of Mercury Gauge (American) mbar = Millibar Gauge (Metric) PSIA = Pounds Per Square Inch Absolute (American) 27.7 IWG = 1 PSIG 703.58 MM of Water = 1 PSIG 2.036 IHG = 1 PSIG 0.069 Bars = 69 mbar = 1 PSIG Standard Atmosphere = 0 PSIG = 14.7 PSIA See Basic Fan Laws Chart for correcting pressure due to speed or density changes on pgs. I-5 and I-6

Pressure Drop/ Back Pressure/ Impedance Friction causes air to slow down and lost energy is measured in pressure drop terms Typical pressure drop areas include piping, elbows, accessories and system Each fixed system has a fixed system impedance caused by a single or multiple pressure drop points Changing the system impedance will cause blowers work point to change Changing the blower with fixed system impedance will change the working back pressure See Friction Loss Per Foot of Tubing and Fitting Charts on pg. I-8

Density Weight/Volume Standard Air = 0.075 lb/cubic foot See Density Chart for other gases on pg. I-4 See Density Correction Chart due to altitude and temperature changes on pg. I-3

Rev. 2/04

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AMETEK Technical and Industrial Products, Kent, OH 44240 e mail: rotronindustrial@ametek.com internet: www.ametektmd.com

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PRP195 & PRP230 Application Engineering BasicsStandard Engineering ConversionsMULTIPLY Atmospheres Atmospheres Atmospheres Atmospheres Atmospheres Atmospheres Atmospheres Bars Bars Bars Bars British Thermal Units British Thermal Units British Thermal Units British Thermal Units British Thermal Units British Thermal Units Centimeters of Mercury Centimeters of Mercury Centimeters of Mercury Centimeters of Mercury Centimeters/Second Centimeters/Second Cubic Centimeters Cubic Centimeters Cubic Centimeters Cubic Centimeters Cubic Feet Cubic Feet Cubic Feet Cubic Feet Cibic Feet Cubic Feet Cu. Ft. of Water (60F) Cubic Feet/Minute Cubic Feet/Minute Cubic Feet/Minute Cubic Inches Cubic Inches Cubic Inches Cubic Inches Cubic Meters Cubic Meters Cubic Meters Cubic Meters Cubic Yards Cubic Yards Cubic Yards Cubic Yards Feet Feet Feet Feet Feet of Air (1 atmosphere 60F) Feet/Minute Feet/Minute Feet/Minute Feet/Minute Feet/Minute Grams/Cu. Cm. Horsepower Horsepower Horsepower Horsepower Horsepower-Hours Inches Inches Inches of Mercury Inches of Mercury Inches of Mercury Inches of Mercury Inches of Mercury Inches of Water Inches of Water Inches of Water Inches of Water Inches of Water BY 76.0 29.92 33.90 10,333 1.013 x 105 14.70 760 0.9869 1. x 106 1.020 x 104 14.50 0.2520 777.5 3.927 x 10-4 1054 107.5 2.928 x 10-4 0.01316 0.4461 136.0 0.1934 1.969 0.6 3.531 x 10-5 6.102 x 10-2 10-6 10-3 2.832 x 104 1728 0.02832 0.03704 7.481 28.32 62.37 472.0 0.4720 62.4 16.39 5.787 x 10-4 1.639 x 10-5 2.143 x 10-5 106 35.31 61,023 1.308 7.646 x 105 27 46,656 0.7646 30.48 12 0.3048 1/3 5.30 x 10-4 0.5080 0.01667 0.01829 0.3048 0.01136 62.43 42.44 33,000 10.70 745.7 2547 2.540 103 0.03342 13.60 345.3 25.40 0.4912 0.002458 0.07355 25.40 5.204 0.03613 TO OBTAIN Cms. of Mercury Inches of Mercury Feet of Water Kgs./Sq. Inch Pascals Pounds/Sq. Inch Torrs Atmospheres Dynes/Sq. Cm. Kgs./Square Meter Pounds/Sq. Inch Kilogram-Calories Foot-Pounds Horsepower-Hours Joules Kilogram-Meters Kilowatt-Hours Atmospheres Feet of Water Kgs./Square Meter Pounds/Sq. Inch Feet/Minute Meters/Minute Cubic Feet Cubic Inches Cubic Meters Liters Cubic Cms. Cubic Inches Cubic Meters Cubic Yards Gallons Liters Pounds Cubic Cms./Sec. Liters/Second Lbs. of Water/Min. Cubic Centimeters Cubic Feet Cubic Meters Cubic Yards Cubic Centimeters Cubic Feet Cubic Inches Cubic Yards Cubic Centimeters Cubic Feet Cubic Inches Cubic Meters Centimeters Inches Meters Yards Pounds/Square Inch Centimeters/Sec. Feet/Second Kilometers/Hour Meters/Minute Miles/Hour Pounds/Cubic Foot British Thermal Units/Min. Foot-Pounds/Min. Kg.-Calories/Min. Watts British Thermal Units Centimeters Mils Atmospheres Inches of Water Kgs./Square Meter Mms. of Mercury Pounds/Square In. Atmospheres Inches of Mercury Kgs./Square Meter Pounds/Square Ft. Pounds/Square In. MULTIPLY KGS./Cubic Meter Kilometers Kilowatts Kilowatts Kilowatts Kilowatts Kilowatt-Hours Liters Liters Liters Log10N Log N or Ln N Meters Meters Meters Meters Meters/Minute Meters/Minute Meters/Minute Meters/Minute Miles Miles Miles Miles/Hour Miles/Hour Miles/Hour Miles/Hour Miles/Hour Mms. of Mercury Mms. of Mercury Mms. of Mercury Pints (Liq.) Pints (U.S. liquid) Pints (U.S. liquid) Pounds Pounds Pounds Pounds of Carbon to CO2 Pounds of Water Pounds of Water Pounds of Water Evaporated at 212F Pounds/Cubic Foot Pounds/Square Foot Pounds/Square Inch Pounds/Square Inch Pounds/Square Inch Pounds/Square Inch Pounds/Square Inch Pounds/Square Inch Square Centimeters Square Centimeters Square Centimeters Square Feet Square Feet Square Inches Square Inches Square Inches Square Inches Square Inches Square Kilometers Square Kilometers Square Kilometers Square Meters Square Meters Temp. (Degs. C.) + 273 Temp. (Degs. C.) + 17.8 Temp. (Degs. F.) + 460 Temp. (Degs. F.) -32 Watts Watts Watts Watts Watts Watts Watts-Hour Watts-Hour Watts-Hour BY 0.06243 3281 56.92 737.6 1.341 14.34 3415 103 61.02 10-3 2.303 0.4343 100 3.2808 39.37 10-3 1.667 3.281 0.06 0.03728 5280 1.6093 1760 44.70 88 1,467 1.6093 26.82 0.0394 1.3595-3 0.01934 28.87 473,179 16 444,823 453.6 16 14,544 27.68 0.1198 970.3 16.02 4,882 0.06804 27.7 2.036 703.1 6.895 x 10 3 51.715 1.973 x 105 1.076 x 10-3 0.1550 929.0 0.09290 1.273 x 106 6.452 6.944 x 10-3 106 645.2 10.76 x 106 106 1.196 x 106 10.764 1.196 1 1.8 1 5/9 0.05692 107 44.26 1.341 x 10-3 0.01434 10-3 3.415 1.341 x 1010-3 TO OBTAIN Pounds/Cubic Foot Feet British Thermal Units/Min. Foot-Pounds/Sec. Horsepower Kg.-Calories/Min. British Thermal Units Cubic Centimeters Cubic Inches Cubic Meters LogEN or Ln N Log10N Centimeters Feet Inches Kilometers Centimeters/Sec. Feet/Minute Kilometers/Hour Miles/Hour Feet Kilometers Yards Centimeters/Sec. Feet/Minute Feet/Second Kilometers/Hour Meters/Minute Inches of Mercury Kgs./Square Cm. Pounds/Square Inch Cubic Inches Cubic Centimeters Ounces (U.S. fluid) Dynes Grams Ounces British Thermal Units (mean) Cubic Inches Gallons British Thermal Units Kgs./Cubic Meter Kgs./Square Meter Atmospheres Inches of Water Inches of Mercury Kgs./Square Meter Pascals Millimeters of Mercury at 0C Circular Mils Square Feet Square Inches Square Centimeters Square Meters Circular Mils Square Centimeters Square Feet Square Mils Square Millimeters Square Feet Square Meters Square Yards Square Feet Square Yards Abs. Temp. (Degs. C.) Temp. (Degs. Fahr.) Abs. Temp. (Degs. F.) Temp. (Degs. Cent.) British Thermal Units/Min. Ergs/Second Foot-Pounds/Min. Horsepower Kg.-Calories/Min. Kilowatts British Thermal Units Horsepower/Hours Kilowatt-Hours Rev. 2/04

AMETEK Technical and Industrial Products, Kent, OH 44240 e mail: rotronindustrial@ametek.com internet: www.ametektmd.com

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EN 404 Application Engineering BasicsDensity Correction Chart

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AMETEK Technical and Industrial Products, Kent, OH 44240 e mail: rotronindustrial@ametek.com internet: www.ametektmd.com

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EN 404 Application Engineering BasicsSpecific Gravity and Density of Various GasesGas or Vapor Acetylene Air Ammonia Argon Benzene Carbon Dioxide Chlorine Ethane Ethylene Helium Hydrogen Hydrogen Sulfide Methane Methyl Chloride Nitrogen Oxygen Propane Sulfer Oxide Water Vapor Chemical Formula C2H2 NH3 A C6H6 CO2 CI2 C2H6 C2H4 He H2 H2S CH4 CH3CI N2 O2 C3H8 SO2 H2O

Temperature Conversion Chartat 60F (1 ATM) Density (lbs./cu/ ft.) .0686 .0763 .0454 .1053 .205 .1166 .0738 .0799 .0739 .01054 .00531 .0897 .0424 .1356 .0738 .0843 .1180 .1720 .0373

Specific Gravity 0.899 1.00 0.587 1.377 2.70 1.539 2.448 1.038 0.969 0.138 0.0695 1.19 0.555 1.785 0.967 1.105 1.55 2.26 0.622

*In the center column, find the temperature to be converted. The equivalent temperature is in the left column, if converting to Celsius, and in the right column, if converting to Fahrenheit.C -78.9 -73.3 -67.8 -62.2 -56.7 -51.1 -45.6 -40.0 -34.4 -28.9 -23.3 -17.8 -17.2 -16.7 -16.1 -15.6 -15.0 -14