Homework Answers
Though most of the losses in pipe is due to friction losses but there are minor losses as well which are associated with flow through valves and fittings.
1. Gate valve has very less pressure loss due to no obstruction in the flow path.
2. Swing check valve has less pressure loss than globe value.
3. Disc type gate valve , when it opens the disc removes from the flow that is why there is low resistance to flow.
4.Globe valve has the highest pressure losses in fully opened conditions because fluid changes its direction when it moves through the valve.
So the answer of the question is D that is Globe valve.
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Fluid Mechanics
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A 12-in diameter pipe conveys fluid at 8 ft/s between two tanks. The friction factor f is 0.02. The pipe entrance and exits are both squared edged. The pipe also contains a fully-open gate valve. Dete...
A 12-in diameter pipe conveys fluid at 8 ft/s between two tanks. The friction factor f is 0.02. The pipe entrance and exits are both squared edged. The pipe also contains a fully-open gate valve. Determine what percent of the head loss is due to minor losses for the following three pipe lengths: (a) 4 ft, (b) 80 ft, (c) 1600 ft. Comment on whether minor losses are always “minor”.
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A system using 10-inch (10") internal diameter pipe requires a selection of flanged valves. Consider 10" ball valves, gate valves, globe valves, and check valves in the fully-open position; and butterfly valves in a variety of open positions. FNW has been chosen as the equipment supplier; the relevant data sheets can be found on Desire2Learn (see below for information on valve part numbers and cor- responding files). The data sheets give valve coefficients (C,): flow rates in GPM corresponding to...
Problem 5 A 12-in diameter pipe conveys fluid at 8 ftl/s between two tanks. The friction factor fis 0.02. The pipe entrance and exits are both squared edged. The pipe also contains a fully-open gate valve. Determine what percent of the head loss is due to minor losses for the following three pipe lengths: (a) 4 ft, (b) 80 ft, (c) 1600 ft. Comment on whether minor losses are always "minor".
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Fluid Mechanics
QUESTION 4 (a) What are the Energy Grade Line (EGL) and Hydraulic Grade Line (HGL) in a pipe system? (1 mark) A factory draws its water supply from a mountain lake located 75 m above the factory (a) without pump. The factory is at present been supplied via 300 m of 20 cm diameter cast iron pipe. For control purposes, there are five gate valves and one globe valve in the line, as well as three standard 90...
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