403 - Chapter 10 & 11 Flashcards
1
Q
Types of Pressure Control Valves
A
Pressure Relief Valve Pressure Reducing Valve Sequence Valve Counterbalance Valve Brake Valve
2
Q
Pressure Relief Valve
A
Relieves pressure when it exceeds a certain amount
3
Q
Pressure Reducing Valve
A
reduces pressure
4
Q
Sequence Valves
A
makes sure things happen in order
5
Q
Counterbalance valves
A
keeps control of a cylinder when gravity acts upon it
6
Q
Brake valve
A
sefety approach to stop a load quickly
7
Q
Three factors that affect flow rate through an orifice:
A
Pressure Drop
Fluid temp/viscosity
Orifice size
8
Q
Flow control methods:
A
Meter-In
Meter-Out
Bleeding
9
Q
Meter-In
A
flow control valve is between pump and actuator.
Doesn’t protect against a runaway.
10
Q
Meter-Out
A
flow control is on outlet side of actuator to control flow coming out.
Used if a load tends to runaway.
