Name: _________________________
AGEN 161
Lab Week 11
The task for this week’s lab will be to create a shopping list for all of the hydraulic components
necessary to create the system depicted in the schematic and answer the questions that follow.
List all of the pertinent information about each of the components and follow the constraints listed
after the schematic. For your engineering of the system assume that only one valve will be
operated at a time.
The system will:
 Be run at 1450 RPM
 Have a working pressure between 1100 PSI and 2500 PSI.
 Allow both the top and bottom cylinders to be able to extend and retract 18,000 lbs of force
 Allow the top cylinder to extend at 0.22 ft/sec or quicker
 Allow the bottom cylinder to extend at 0.17 ft/sec or quicker
 Have all of the hydraulic lines be the correct size to handle the chosen flow at the
appropriate velocity. (pressure, return and suction)
 Will have a flow of less than 9.5 GPM
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Pressures will be listed in PSI, Flow in GPM, Velocities in ft/sec, areas in in2, volumes in in3
Questions:
1. Create a list of the components that would need to be purchased to create the above
system. This list will be created from the attached sheets when possible.
2. What is the system pressure?
3. What is the piston diameter for the bottom cylinder?
4. What is the rod diameter for the bottom cylinder?
5. What is the piston diameter for the top cylinder?
6. What is the rod diameter for the top cylinder?
7. What is the diameter of the line required between the reservoir and the pump?
8. What is the diameter of the line required between the pump and the valve block?
9. What is the diameter of the line required between the valve block and reservoir?
10. What is the diameter of the line required between the valve block and the top
cylinder?
11. What is the diameter of the line required between the valve block and the bottom
cylinder?
12. What is the flow before the valve block?
13. What is the flow after the valve block?
14. What is the displacement of the pump?
15. What is the hydraulic horsepower required to turn the pump?
16. What is the input torque needed to turn the pump?
17. Assuming that the hydraulic pump is 78% efficient, what size motor would be
needed to turn the pump?
18. If the top cylinder has an 18 in stroke, how long will it take to: (include your cylinder
dimensions here)
 Extend
 Retract
19. If the bottom cylinder has an 18 in stroke, how long will it take to: (include your
cylinder dimensions here)
 Extend
 Retract
20. What would occur if both cylinders were extended at the same time with no load?
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