Lesson 5: Hydraulic Valves Flashcards

1
Q

What are the 2 types of valves?

A

Flow and Pressure

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2
Q

This type of valve selects the route of flow

A

Flow Valve

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3
Q

Purpose of SELECTOR valves?

A

determines the direction of fluid flow

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4
Q

Poppet, rotary, spool, are all types of what?

A

Selector Valve

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5
Q

If fluid does not pass through the valve when OFF what type is it?

A

Closed Centre

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6
Q

Poppet selector valves are controlled by what?

A

CAMS

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7
Q

This type of selector valve has a cylinder inside that rotates

A

ROTARY

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8
Q

This selector valve uses a piston and is used for flight controls/landing gear/autopilot

A

SPOOL

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9
Q

What are the 2 types of check valves?

A

Inline Integral

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10
Q

Purpose of restrictors?

A

reduce fluid flow by reducing passage area

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11
Q

This type of valve is similar to a check valve but follows a series of events

A

Sequence Valve

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12
Q

Similar to pressure activated sequence valves except that they are used to ensure essential systems are given priority over non-essential systems

A

Priority Valves

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13
Q

Purpose of quick disconnect valves?

A

maintenance suction lines

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14
Q

Purpose of FUSES

A

prevent loss of fluid DOWNSTREAM

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15
Q

2 types of fuses?

A

Pressure drop Volume

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16
Q

2 ways of resetting a fuse?

A

manually bleed off self reset

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17
Q

How does the pressure drop fuse work?

A

pressure spring piston

18
Q

WHich type of fuse allows reverse flow?

A

Volume

19
Q

This type of valve is used to provide an alternate route for fluid to travel when required(back-up or emergency operation)

A

Shuttle valve

20
Q

How does a shuttle valve work?

A

piston shift

21
Q

Purpose of shut off valves?

A

shut off supply of hydraulic fluid

22
Q

Where do we use shut off valves?

A

engine firewall shut off maintenance iso inlet to actuators

23
Q

These valves used to regulate or control the pressure in a hydraulic system.

A

Pressure control valve

24
Q

What are the types of pressure control valves?

A

relief regulator reducer

25
Q

Purpose of system RELIEF valve?

A

backup for main pressure reg high pressure check valve

26
Q

Purpose of thermal relief valves?

A

relieve pressure caused by thermal expansion

27
Q

Purpose of pressure regulators?

A

maintain a specified pressure range in a closed-centre hydraulic system powered by a constant displacement EDP

28
Q

Where would you use a pressure reducer?

A

where component or sub-system pressure is less than system pressure (eg autopilot servo)

29
Q

What are the 3 types of IN LINE check valves?

A

Ball

Cone

SWING

30
Q

What type of valve is this?

A

POPPET selector valve

31
Q

What type of valve is this?

A

Closed Centre SPOOL type selector valve

32
Q

What type of check valves are these?

A

IN LINE check valves

33
Q

Identify this type of valve

A

VARIABLE orifice RESTRICTOR valve

34
Q

What type of valve is this?

A

Sequence valve

35
Q

What type of valve is this?

A

PRIORITY VALVE

36
Q

What type of valve is this?

A

QUICK DISCONNECT VALVE

37
Q

What type of valve is this?

A

Volume type FUSE

38
Q

What type of valve is this?

A

SHUTTLE valve

39
Q

What type of valve is this?

A

PRESSURE RELIEF valve

40
Q

What type of valve is this?

A

THERMAL RELIEF valve

41
Q

What type of valve is this?

A

Pressure REDUCER

42
Q
A