Hydraulics systems Flashcards
Flow control valves
Control speed and direction of fluid flow in the hydraulic system.
Selector valves
Control the direction of movement of a hydraulic actuating cylinder or similar device
Check Valve
Allows fluid to flow unimpeded in one direction but prevents fluid in the opposite direction
Orifice type check valve
allows fluid in one direction and restricts flow in the opposite direction us a spring, ball, and set combination as a check valve has a calibrated orifice machine into use in heavy gear at maximum speed
Sequence valves
they set one unit automatically set another unit into motion usually use in two branches of a circuit
Types of sequence valves
valves control by pressure, control mechanically and electrical switches.
Priority valves
Gives priority to the critical hydraulic subsystems over non-critical systems when system pressure is low
Quick disconnect valves
Are installed in hydraulic lines to prevent loss of fluid when units are removed
Hydraulic fuses
They detect a sudden increase of flow, such as a burst downstream, and shut off the fluid flow. by closing it preserves hydraulic fluid for the rest of the system
Pressure control valves
Control pressure for safe and efficient operation of fluid power systems components and related equipment
Relief Valve
Is use to limit the amount of pressure being exerted on a confined liquid, is necessary to prevent failure of components
Pressure regulators
It manage the output of the pump to maintain system operating pressure within predetermined range used ic constant delivery pumps
Pressure reducers
used to lower the normal system operating pressure by specific amount they also provide a steady pressure into a system that operates at a lower pressure
Shuttle valves
Is used to isolate the normal system from an alternate or emergency system
Shutoff valves
Are used to shutoff the flow of fluid to a particular system or component it creates a priority in a hydraulic system and are control by pressure switches
