Hydraulic Valves

Question 1

The pressure control valve that is normally open and externally drained, effects its actuator by

Reducing speed
Reducing pressure
Sequencing
Increasing pressure

Answer 1

Reducing pressure

Question 2

What is done to minimize the effects of the slight compressibility of hydraulic fluid to proportional and servo valves, and their actuators

Answer 2

Connections are ridged and short

Question 3

What is a typical application of the pilot to open check valve

Answer 3

One way directional control

Question 4

In a (brake) pressure control valve which is internally and externally piloted what prevents the motor from running away

Answer 4

External pilot

Question 5

A bleed off circuit is usually used

For meters out
Widely fluctuated loads
Runaway loads
Metering in to increase system efficiency

Answer 5

For metering-in to increase system efficiency

Question 6

What condition would determine if a pressure control valve needs and external pilot drain

Answer 6

Outlet port pressure

Question 7

Stacker valves are supplied and drained through a

Sub plate
Flow control valve
Pressure relief valve
DCV

Answer 7

Sub plate