Becker VRP-SB-PID Series Natural Gas Controllers Instruction Manual | 18
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Example Application #4
Power Plant Station with Globe Style Control Valve
(2” and 3” Size)
2” and 3” Globe Valves are used with VRP-PID controllers
without a low flow start up run.
For this particular setup one controller is used as a monitor
and another as the operating regulator. Monitor serves as a
security device that protects power plant in case of a failure
in the regulator.
TO COMPRESSOR
TURBINE
VRP-SB-PID-40
REVERSE ACTING
VRP-SB-PID-40
DIRECT ACTING
INTEGRAL=12
DERIVATIVE
S=2
DEAD BAND = 0
HIGH GAIN
(SMALL RINGS)
DERIVATIVE
S=3
INTEGRAL=7
DEAD BAND = -1/4
FLOW
HIGH GAIN
(SMALL RINGS)
WORKING REGULATOR
SPRING TO OPEN GLOBE VALVE
MONITOR REGULATOR
SPRING TO CLOSE GLOBE VALVE
KEY
(1)
(1)
ALL LINES ARE SEPARATE, INTERSECTING LINES DO NOT IMPLY CONNECTIONS
OUTPUT PRESSURE
SENSING PRESSURE
Recommended Application:
Small Power Plants (200 MW & smaller)