CH.02
Fisher Control Valve — Interactive Trainer
← FIELD MANUAL
Input Signal Control
// 4–20 mA → positioner → pneumatic actuator → valve plug
4–20 mA
12.0 mA
Supply PSI
20 PSI
ACTION:
ATO
ATC
FAIL:
FAIL CLOSED
FAIL OPEN
// Live Valve Visualization
FISHER EW SERIES
PLUG
ACTUATOR
POSITIONER
12.0mA
9.0 PSI OUT
AIR IN
VALVE OPEN
50%
12.0
mA INPUT
9.0
PSI OUTPUT
50%
% OPEN
50%
FLOW RATE
⚡ Fault Injection — Simulate Field Problems
✗ SIGNAL LOSS (0 mA)
✗ AIR SUPPLY FAIL
✗ VALVE STUCK MID
✗ SIGNAL SATURATED
✓ CLEAR ALL FAULTS
Live Status
ACTUATOR
AIR-TO-OPEN
FAIL SAFE
FAIL CLOSED
AIR SUPPLY
20 PSI — OK
SIGNAL
12.0 mA — OK
POSITION
50% OPEN
FAULT
NONE
Position Trend
ATO Signal → Response
mA
PSI
% Open
Flow
4.0
3.0
0%
CLOSED
8.0
6.0
25%
LOW
12.0
9.0
50%
MID
16.0
12.0
75%
HIGH
20.0
15.0
100%
FULL
// Field Analysis
Adjust the signal slider or inject a fault to see real-time analysis.