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Page 2 <br /> FLOW EQUATIONS DIFFERENTIAL PRESSURE EQUATIONS <br /> ' 1. Any Liquid1 Any Liquid <br /> Q (GPM) = 5 668 x K x Dz x QPISf Z�F (in WC) = Q2 x Sf <br /> K2xD4x3214 <br /> ' 2 Steam or Any Gas <br /> Q Ob/Hr) = 3591 x K x D2 xp x LP 2 Steam or Any Gas 2 <br /> AP (in. WC) - Q <br /> ' 3. Any Gas K2 x D4 x p x 128,900 <br /> Q (SCFM) = 128 8 x K x D2x P x AP 3. Any Gas 2 <br /> (T+460) x Ss AP (in WC) = a x Ss x {T+460) <br /> K2 x D4 x P x 16,590 <br /> ' TECHNICAL NOTATIONS <br /> The following notations apply <br /> ' AP = Differential pressure expressed in inches of water column <br /> Q = Flow expressed in GPM, SCFM or PPH as shown in equation <br /> K = Flow coefficient — See Values Tabulated on page 3 <br /> D = Inside diameter of line size expressed in inches For square <br /> & rectangular ducts use D= 4 x Height x Width <br /> 1 � <br /> P = Static Line pressure (psia) <br /> T = Temperature in degrees Fahrenheit (plus 460=°Rankin) <br /> t p = Density of medium in pounds per cubic foot <br /> Sf = Sp Gr at flowing conditions <br /> Ss= Sp Gr at 60OF <br /> y <br /> 1 <br /> ' SCFM TO ACFM EQUATION <br /> SCFM — ACFM x ( 14 7 4 P SIG 1 460 20 °F <br /> ' ACFM — SCFM x 147 460 + °F l <br /> ( 147 + PSIG 520POUNDS PER J <br /> UBC FOOT STD — CUUNDS PER BIC C FOOT ACT x 147( 147 + PSIG ) 4605 0 °F } <br /> ' � POUNDS PER <br /> CUBIC POUNDFOOTR ACT CUBIC OOT STD x ` 147 4 PSIG 1( 460520 <br /> -x- -F }1 CUBIC FOOT OF AIR � 0 076 POUNDS PER `CUBIC FOOT AT 60°F AND 14 7 PSIA <br /> ' ;(520 — 460 + 60°} Std Temp Rankine <br /> " DWYER NSzTRUMENT xIN <br /> Sri <br /> �� r ^C�;B z37 is iga ^ ndiana� 6:i_ r <br /> �F !?tSone=Z'19'IS7� y4 X29'3 790 Teiez 2591E �^ �- <br />