Eaton 10 Pressure Controls

Question 1

Relief valves are normally

Answer 1

closed

Question 2

The relief valve’s purpose is to:

Answer 2

limit pressure in the system to a preset maximum

Question 3

Cracking pressure is:

Answer 3

the pressure at which the valve first begins to divert flow

Question 4

Pressure override is:

Answer 4

the difference between cracking pressure and full-flow pressure

Question 5

Back pressure valve can be used as a:

Answer 5

unloading valve

Question 6

With the unloading valve, the primary port pressure is

Answer 6

independent of the spring force because the remote pressure source operates the spool.

Question 7

In the unloading valve, free flow is permitted from the primary to the secondary port as long as:

Answer 7

the control pressure is at least 150 psi above the spring setting.

Question 8

In a sequence valve, if pressure were allowed in the drain passage:

Answer 8

it would add to the spring force and raise the pressure required to open the valve.

Question 9

A brake valve is used in:

Answer 9

the exhaust line of a hydraulic motor

Question 10

A brake valve is used in a hydraulic motor to:

Answer 10

prevent over speeding when an overrunning load is applied to the motor shaft

prevent excessive pressure build up when decelerating or stopping a load

Question 11

When the load is being accelerated, pressure is maximum:

Answer 11

at the motor inlet