Fluid FlowHEAD LOSSTABLE 1Typical Values ofLeqDItemLeqDGlobeValveConventionalY-PatternGateValveFully Open75% Open50% Open25% OpenStandardTeeFlow through RunFlow through Branch90° Standard Elbow45° Standard ElbowReturn Bend40016010351509001060301650Example:A fully-open gate valve is in a pipe with a diameter of 10 inches. What equivalent lengthof pipe would cause the same head loss as the gate valve?Solution:From Table 1, we find that the value of Leq/D for a fully-open gate valve is 10.Leq= (L/D) D= 10 (10 inches)= 100 inchesBy adding the equivalent lengths of all components to the actual length of pipe in a system wecan obtain the Leq value for the entire piping system.Rev. 0 Page 35 HT-03
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