Die Anfrage
“A gas header pressure control loop: a compressor feeds PV-101, PT-101 measures downstream header pressure, PIC-101 controls the fail-closed valve, and PSV-101 relieves the header to a safe vent at 10 barg.”
Dann probieren SieAdd a high-pressure alarm on the headerChange the relief set pressure to 12 barg
Was diese Zeichnung zeigt
Die dahinterstehenden Entscheidungen verstehen.
01Measurement
PT-101 senses pressure downstream of PV-101.
02Control
PIC-101 modulates the inlet control valve.
03Protection
PSV-101 relieves independently to the safe vent.
04Fail state
PV-101 closes on loss of actuator air.
Use this pattern for a basic regulated gas header; review relief sizing and setpoints for the actual service.
FAQ
Häufige Fragen
What does PIC-101 do?
It adjusts PV-101 to maintain the gas-header pressure setpoint.
Why is a PSV separate from the control loop?
The relief valve provides independent protection if normal pressure control cannot contain overpressure.
What does fail closed mean?
PV-101 moves closed if it loses actuator air.