---
title: "Three-Phase Separator Control System — asset register"
doc_type: pid-asset-register
source: "instrumentationtools.com_piping-and-instrumentation-diagram.jpg"
tags: [V-100, PSV-1, PT-1, PC-1, PV-1, LT-1, LC-1, LV-1, LT-2, LC-2, LV-2]
summary: "This P&ID shows a three-phase horizontal separator with dedicated control loops for level and pressure regulation. It displays a water outlet with a level control loop (LT/LC/LV), an oil outlet with its own level control loop (LT/LC/LV) separated by an internal weir, and a vapor outlet regulated via a pressure control loop (PT/PC/PV)."
---

# Three-Phase Separator Control System

This P&ID shows a three-phase horizontal separator with dedicated control loops for level and pressure regulation. It displays a water outlet with a level control loop (LT/LC/LV), an oil outlet with its own level control loop (LT/LC/LV) separated by an internal weir, and a vapor outlet regulated via a pressure control loop (PT/PC/PV).

**Source:** instrumentationtools.com_piping-and-instrumentation-diagram.jpg · **Components:** 11 (1 equipment, 6 instrument, 4 valve)

## Equipment (1)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| V-100 | 3-Phase Separator | Equipped with Demister Pad, Weir, and Vortex Breakers | LT-1, LT-2, PT-1, PSV-1 |

## Instruments (6)

| Tag | Function (ISA 5.1) | Description | Details | Connects to |
|---|---|---|---|---|
| PT-1 | PT = Pressure Transmitter, field-mounted | Pressure Transmitter | — | V-100, PC-1 |
| PC-1 | PC = Pressure Controller, shared display/control | Pressure Controller | — | PT-1, PV-1 |
| LT-1 | LT = Level Transmitter | Level Transmitter | Left side interface / water level measurement | V-100, LC-1 |
| LC-1 | LC = Level Controller, shared display/control | Level Controller | — | LT-1, LV-1 |
| LT-2 | LT = Level Transmitter | Level Transmitter | Right side oil level measurement | V-100, LC-2 |
| LC-2 | LC = Level Controller, shared display/control | Level Controller | — | LT-2, LV-2 |

## Valves (4)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| PSV-1 | Pressure Safety Valve | Vents to atmosphere or safe location | V-100 |
| PV-1 | Pressure Control Valve | Controls vapor outlet flow | PC-1 |
| LV-1 | Level Control Valve | Water outlet control valve | LC-1 |
| LV-2 | Level Control Valve | Oil outlet control valve | LC-2 |