Exam (elaborations)
IHS - p2 - Hydraulic pressure control valves Questions and Answers
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IHS - p2 - Hydraulic pressure control valves
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IHS - p2 - Hydraulic pressure controlvalves
what do relief valves do - answer relief valves limit the maximum system pressure ,
which will protect system components , pipping ,tubing.
they also limit the maximum output of the hydraulic system
what are the 2 types of relief valves - answer direct acting and pilot operated type relief
valve
direct acting relief valves balances the hydraulic pressure by - answer direct acting relief
valve balanced the hydraulic pressure by the direct force of a heavy spring , which is
adjustable
direct acting relief valves are usually used for - answerfor low volume pump capacity
if a higher pump capacity for a larger relief valve, a _____ is used - answera pilot
operated type is used for larger relief valves
explain cracking pressure - answerthe pressure in which the valve just begins to let oil
escape through the relief valve
explain full flow pressure - answerthe pressure needed to pass all of the output flow
from the pump through the relief valve
pressure override - answerthe difference between full flow pressure and cracking
pressure for any particular valve
what is reducing valve - answerreduces the pressure in a circuit
sequence valve - answerit assures that one operation has been completed before
another function can be performed. the valve is set to a certain pressure, and when that
pressure is hit , the sequencing valve will allow water to pass through
unloading valve - answerused to allow fluid to flow through it to the reservoir at partically
zero pressure
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