Power Plant Station With T-Ball Style Control Valve - GE Becker VRP-SB-PID Series Instruction Manual

Example Application #2

Power Plant Station with T-Ball Style Control Valve

(4", 6" and 8" Size)
This application is most commonly used when there is a
minimum ΔP < 25 psig (172 kPa) across the station. It is
configured using a main run and Start-up/Trimmer Run with
2" Globe Valves. When minimum ΔP > 50 psig Flexible Element
Regulator are used as start-up run. A Low Flow/Trimmer Run is
used for the start of power plants. It is also used in handling
small variations in the load from power plants.
SPRING TO CLOSE GLOBE VALVE
FLOW
SPRING TO CLOSE BALL VALVE
KEY
(1)
POWER GAS LINE
OUTPUT LINE
SENSING LINE
(1) ALL LINES ARE SEPARATE, INTERSECTING LINES DO NOT IMPLY CONNECTIONS
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VRP-SB-PID-40
REVERSE ACTING
DERIVATIVE
S=2
HIGH GAIN
(SMALL RINGS)
DEAD BAND = 0
MONITOR REGULATOR
VRP-SB-PID-125
REVERSE ACTING
DERIVATIVE
S=2
VB-250
VOLUME
BOOSTER
DEAD BAND = -1/4
MONITOR REGULATOR
Recommended Applications:
A. Low pressure drop for T2 (1-300 psi)
B. High pressure drop for T4 (500-1000 psi)
C. Pipeline Heater and Filter are not required and Strainer is
recommended for trim run.
DERIVATIVE
S=3
INTEGRAL=12
SPRING TO OPEN GLOBE VALVE
WORKING REGULATOR
DERIVATIVE
S=2
HIGH GAIN
(SMALL RINGS)
VB-250
INTEGRAL=12
VOLUME
BOOSTER
DEAD BAND = -1/2
SPRING TO OPEN BALL VALVE
WORKING REGULATOR
Becker VRP-SB-PID Series Natural Gas Controllers Instruction Manual | 16
VRP-SB-PD-40
DIRECT ACTING
INTEGRAL=0
HIGH GAIN
(SMALL RINGS)
DEAD BAND = -1/4
INTEGRAL=6
VRP-SB-PID-125
DIRECT ACTING
TO COMPRESSOR
TURBINE
HIGH GAIN
(SMALL RINGS)