Page 227 - Root Cause Failure Analysis
P. 227
Control Valves 215
PUSH ROD TRIPS
SWITCH WHEN
SPWNG HOLDS
VALVE OFFSET
IN NORMAL
OPERATION
A j-w
Figure 17-13 Schematic for a cam-operated, two-position valve.
w
P
T
P
T
~
2-Position Valve
P
P
T
T
3-Position Valve P 1
Figure 17-14 Schematic of two-position and three-position valves.
