1.2 Flow Control

Question 1

Answer 1

Standard Fixed Orifice

Question 2

Answer 2

Knife Edge Fixed Orifice

Question 3

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Answer 3

Variable Needle Valve

Question 4

Answer 4

Variable Flow Control with Check Valve

Question 5

Pressure Compensated vs Non-Compensated valves

Answer 5

Non-compensated: Both pressure and flow rate change.

Compensated: Pressure changes, flow rate stays same.

Question 6

Bypass Type Pressure Compensated Valve

Answer 6

Excess pressure will cause flow to divert through a bypass back to the tank. This is used in bleed-off method of flow control.

Question 7

Restrictor Type Pressure Compensated Valve

Answer 7

Restricts inlet flow but pressure will build up across the valve. This is used for Meter-In and Meter-Out method of flow control.

Question 8

What are the 3 methods of flow control?

Answer 8

Meter-In
Meter-Out
Bleed-Off

Question 9

Meter-in vs. Meter-out

Answer 9

Metering-in is when you control the flow before the load. This lets you operate the load at lower pressure.

Metering-out is when you control the flow after the load. This lets you operate the load at higher pressure.

Question 10

Meter-in or Meter-out on Extension

Answer 10

Meter-in on Extension

Question 11

Meter-in or Meter-out on Retraction?

Answer 11

Meter-In on Retraction

Question 12

Meter-in or Meter-Out on Extension? On Retraction?

Answer 12

Meter-In on Extension and Retraction

Question 13

Meter-In or Meter-Out on Retraction?

Answer 13

Meter-Out on Retraction

Question 14

What method of flow control is this? How does it work?

Answer 14

Excess flow is diverted back to the sump.

Question 15

Meter-In or Meter-Out on Extension? Retraction?

Answer 15

Meter-Out on Extension and Retraction

Question 16

Meter-in or Meter-Out on Extension?

Answer 16

Meter-Out on Extension

Question 17

Answer 17

Question 18

What does this circuit do?

Answer 18

Rotary Actuator Speed Control