Transcription of VELOCITY TO GPM CONVERSIONS - ONICON Flow and …
1 VELOCITY TO GPM CONVERSIONSin standard wall pipes*Flow VELOCITY (ft/sec) x Factor (1 ft/sec) = GPMT ypical HVAC Design Maximum Flow = 4 to 8 ft/secNominal Pipe SizeGPM @ 1 ft/secGPM @ 2 ft/secGPM @ 4 ft/secGPM @ 8 ft/secGPM @ 10 ft/secGPM @ 12 * * * * * * *1530601191491793*2346921842302794*40791 593183974766*901803607209001,0808*156312 6241,2481,5601,87210*2464929841,9682,460 2,952123537061,4122,8243,5304,2361443086 01,7203,4404,3005,160165691,1382,2764,55 25,6906,828187281,4562,9125,8247,2808,73 6209071,8143,6287,2569,07010,884241,3232 ,6465,29210,58413,23015,876302,0944,1888 ,37816,75520,94025,133363,0426,08412,168 24,33630,42036,504424.
2 1658,33016,66033,32041,65049,980485,4651 0,93021,86143,72254,65065,583* Standard Wall and Schedule 40 are the same up to 10 11451 Belcher Road South, Largo, FL 33773 USA Tel +1 (727) 447-6140 Fax +1 (727) Flow Meter Site SelectionGeneral Guidelines Acceptable to install in vertical pipe Position meter anywhere in the upper 240 for horizontal pipeFLOWCLEARANCE REQUIRED FOR INSTALLATION(23 to 26 depending on pipe size)30% Downstream70% UpstreamAvailable Straight Run*Evaluating Upstream piping ConditionsStraight PipeSingle BendPipe Reduction or EnlargementOutflowing TeesMultiple Bends in Same PlaneMultiple Bends Out of PlaneInflowing TeesControl ValveWORSE BETTER* Contact ONICON for model specific straight run FormulaeEnergy CalculationsBTU/Hr = 500* x Flow Rate (GPM) x Delta-T ( F)1 Ton = 12,000 BTU/HrONICON Specific Flow CalculationsCalculate Flow Rate from Frequency OutputGPM =Calculate Flow Rate from Current Output (4-20 mA)
3 GPM =Calculate Flow Rate from Voltage Output (0-10 VDC)GPM =* Approximation for water.** Refer to calibration tag or certificate. (Measured Frequency (Hz) x 60)Meter Factor** (PPG)(Measured Current (mA) -4)16 mAxFull Scale Flow Rate**Measured Voltage (DC)10xFull Scale Flow Rate**11451 Belcher Road South, Largo, FL 33773 USA Tel +1 (727) 447-6140 Fax +1 (727)
