Process packages

Process Units

Two- and three-phase separation equipment and process packages.

Equipment overview

Engineered for the application.

Process separation equipment divides incoming streams into their gas and liquid phases. Pars Technic supplies two- and three-phase units with vessel configurations and internal arrangements tailored to the process requirements.

Engineering scope

Two- and three-phase separation
Horizontal and vertical vessel arrangements
Process-specific separation internals
Package integration with project piping and instrumentation

At a glance

Process Units — equipment summary
Equipment	Two- and three-phase process separators
Separated phases	Gas, oil, and water as required by the service
Design inputs	Stream composition, flow range, and operating conditions
Delivery scope	Equipment and package scope agreed for each project

How it works

Three phases out of one stream.

A three-phase separator gives a well stream time to come apart: gas rises out of the liquid, oil droplets rise out of the water and water droplets sink out of the oil. Change the water cut and watch the interface, the retention time and the droplet sizes follow one calculation.

The part each step explains (the interface while settling)Shell 1,800 mm inside × 6,000 mm T/T, 2:1 headsIllustrative case: 24 m³/h of oil (850 kg/m³, 10 mPa·s) with produced water (1,030 kg/m³, 0.8 mPa·s); the weir holds the liquid at half the diameter over a 3.84 m settling length, and the interface is set so oil and water get the same retention time (liquid volume ÷ liquid flow). Stokes' law, v = g·d²·Δρ / (18·μ), gives the droplet speeds; droplets are drawn at 20× speed. Values are illustrative; each separator is sized on its own process data.

Separation sequence

Follow the stream

Each step lights the part that does the work. The water cut drives the interface, the retention time and the smallest droplets removed.

Incoming water cut30 %

Water cut: 30 %
Liquid in (oil + water): 34.3 m³/h
Interface above bottom: 373 mm
Retention time: 8.6 min
Oil droplet 200 µm rising: 4.9 mm/s
Water droplet 500 µm settling: 2.5 mm/s
Smallest oil droplet out of the water: 77 µm
Smallest water droplet out of the oil: 323 µm

Design referencesAPI 12J (oil and gas separators); ASME Section VIII, Division 1 for the pressure vessel.

Technical documents

Equipment resources.

Full technical library

2 & 3 Phase Process UnitsPDF · 1.4 MB · Opens in a new tab

From our archive

Equipment in focus.

Process Units: Equipment photograph 01 — Process UnitsEquipment photograph 01

Process Units: Equipment photograph 02 — Process UnitsEquipment photograph 02

Process Units: Equipment photograph 03 — Process UnitsEquipment photograph 03

Process Units: Equipment photograph 04 — Process UnitsEquipment photograph 04

Process Units: Equipment photograph 05 — Process UnitsEquipment photograph 05

Process Units: Equipment photograph 06 — Process UnitsEquipment photograph 06

Equipment demonstrations

A closer look at the equipment.

6 Ways to Separate an Oil and Water EmulsionVIDEO · Opens in a new tab

4 Types of 3-Phase Separator TankVIDEO · Opens in a new tab

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