FK 40 - Tri-Canada

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Loss of head calculation Loss of head in straight pipe runs Already during design of the plant and piping layout in front of and behind the pump, losses can be limited when considering: • the pipe diameter is sufficiently dimensioned, • less fittings are used, • fittings with low friction loss are selected, • short pipe runs are planned. The diagram shows the loss of head for straight pipe runs as a function of a pipe length of 100 m and a given flow velocity v depending on the flow rate and the pipe diameter.
Example: Flow rate Q = 25 m≈/h Pipe diameter From the diagram results: d = 50 mm Flow velocity v = 3.5 m/s Loss of head H = 35 m/100 m V The loss of head in fittings can be determined almost exactly when using adequate pipe lengths. The loss of head in a fitting is considered equal to a straight pipe with corresponding length. This calculation is valid only for water and fluids similar to water. With the same diameter of pipes and fittings we can simplify the calculation. Equivalent pipe lengths in meter for fittings (valid for Re ⊕ 100,000 and roughness k ∪ 0.04 mm) Loss of head calculation Loss of head caused by fittings
Page 2 and 3: Content Pump technology terms . . .
Page 4 and 5: Pump technology terms Flow rat e [m
Page 6 and 7: Pump technology terms Flow behaviou
Page 8 and 9: Pump technology terms Types of flow
Page 10 and 11: Pump technology terms NPSH value [m
Page 14 and 15: Loss of head calculation Example: F
Page 16 and 17: Centrifugal pumps Feat ures of t he
Page 18 and 19: Centrifugal pumps Correction of the
Page 20 and 21: Centrifugal pumps Pumps connected i
Page 22 and 23: Centrifugal pumps Centrifugal pump
Page 24 and 25: Centrifugal pumps Centrifugal pump
Page 26 and 27: Centrifugal pumps Power consumption
Page 28 and 29: Centrifugal pumps Self- priming cen
Page 30 and 31: Centrifugal pumps Multistage centri
Page 32 and 33: Positive displacement pumps Perform
Page 34 and 35: Positive displacement pumps Selecti
Page 36 and 37: Positive displacement pumps Case 1:
Page 46 and 47: Positive displacement pumps Rotary
Page 58 and 59: Mechanical seal selection Double me
Page 60 and 61: Mechanical seal selection “Face t
Page 62 and 63:
Mechanical seal selection Elastomer
Page 64 and 65:
Pump cleaning SIP After CIP cleanin
Page 66 and 67:
Index Cavitation . . . . . . . . .
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FK 40 - Tri-Canada

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