Do not answer the question about drawing a graph PUMP SYSTEM – SYSTEM CURVE AND NPSHThe pumping system shown below consists of a suction pipe of length 3m and diameter80mm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a losscoefficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 and 1.0,respectively; suction and delivery pipe friction factor f = 0.007Darcy. A Robuschi 150-500pump rotates at 1470 rpm and the desired flow rate is a minimum of 200 m3/h.SUCTION PIPEComplete the following tasks:1. Draw the system curve as described above on the Roubuschi pump curve datasheet supplied. Work in increments of Q 50m3/h starting at 0 (7-point curve)O d.aller?If the 400 impeller is used:Assume:the gauge pressure in the suction tank at 115 kPa,the vapour pressure of the water at its average operating temperature at 20Csuction height as 1.5 m.3. Is the pump likely to cavitate? Support answer with a NPSH calculation approach.4. Describe two steps that could be taken to reduce the likelihood of cavitation.

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Engineering

Civil Engineering

4. Describe two steps that could be taken to reduce the likelihood of cavitation.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Do not answer the question about drawing a graph

PUMP SYSTEM – SYSTEM CURVE AND NPSH
The pumping system shown below consists of a suction pipe of length 3m and diameter
80mm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a loss
coefficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 and 1.0,
respectively; suction and delivery pipe friction factor f = 0.007Darcy. A Robuschi 150-500
pump rotates at 1470 rpm and the desired flow rate is a minimum of 200 m3/h.
SUCTION PIPE
Complete the following tasks:
1. Draw the system curve as described above on the Roubuschi pump curve data
sheet supplied. Work in increments of Q 50m3/h starting at 0 (7-point curve)
O d.
aller?
If the 400 impeller is used:
Assume:
the gauge pressure in the suction tank at 115 kPa,
the vapour pressure of the water at its average operating temperature at 20C
suction height as 1.5 m.
3. Is the pump likely to cavitate? Support answer with a NPSH calculation approach.
4. Describe two steps that could be taken to reduce the likelihood of cavitation.

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