Hydraulic Cylinders Flashcards
Ram type cylinders are ____________ acting cylinders
single
How do stroke control devices work?
After the stop valve closes, two small bleed holes in the valve allow a limited flow of oil out of the cylinder.
By holding the control lever in retract position, the __________ can be retracted further.
piston
When there is a cushion at the end of the stroke, the ____________ is closed
oil outlet
A _____________allows a cylinder to provide a rapid starting stroke with low force and a slower, more powerful working stroke.
stepped piston
____________are installed with pressure gauges to eliminate pulsations within the hydraulic system flows and pressures.
Snubbers
What are the five different designs that snubbers come in?
- Sintered inlet,
- threaded plug
- porous element
- metering pin
- small Bourdon tube.
Anti- Cavitation valves are also known as _________ valves.
make up
Anti- Cavitation valves are designed to prevent cylinder cavitation by: ________________
drawing oil directly from the reservoir whenever the cylinder moves faster than what the pump can supply
Quick Drop valves are installed in cylinders to:
speed up lowering cycles
Load check valves are also known as __________________
counterbalance valves
Load check valves provide which three basic functions?
- Load holding
- Load control
- Load safety
Load ___________ prevents the uninitiated movement of an actuator on a machine.
holding
Load ___________ prevents uncontrolled movement of an actuator in the event of a hose failure.
safety
Load __________provides a counterbalance when lowering a load.
control
