Oil Coalescer/Separator Systems

Remove moisture and particulate contamination from turbine lube oils. Hilco coalescer/separator systems protect bearings, extend oil life, and reduce unplanned maintenance across power generation, refinery, chemical, and heavy industrial applications.

99.5%
Particulate @ 3 µm
< 25 ppm
Free water content
< 150 ppm
Total water
10–100
GPM flow range

Measured moisture reduction

In a 2,000-gallon steam turbine reservoir with a 10-GPM Hilco coalescer/separator installed, the system reduced moisture content from 3,174 ppm to natural saturation in 16 hours of operation.

3,174 → 270
PPM at 8 hours
Over 91% moisture reduction in the first 8 hours of continuous operation.
3,174 → 121
PPM at 16 hours
Reduced to natural saturation point — the lowest achievable without vacuum dehydration.
Download HSS-2 Coalescer Separator Brochure (PDF)

Stand-alone coalescer/separator systems

Each stand-alone system includes pump, motor, controls, pre-filter, coalescer/separator vessel, sampling ports, and automatic water drain. Connect to the reservoir and operate.

Standard system includes

Positive displacement oil pump with integral relief valve
TEFC pump motor
NEMA 4 electrical enclosure with controls
ASME code pre-filter vessel
ASME code coalescer/separator vessel
Clean and dirty sampling ports
Inlet basket strainer
Automatic pneumatic water drain valve
Manual moisture drain
Liquid level sight gauge

Sizing guide

Flow capacity should be at least 1/2% of total lube oil volume.

ModelFlow RateMax Reservoir
02CS1010 GPM2,000 Gallons
02CS2020 GPM4,000 Gallons
02CS3030 GPM6,000 Gallons
02CS6060 GPM12,000 Gallons
02CS100100 GPM20,000 Gallons

Options: explosion-proof electrical controls, low-watt-density oil heaters, CRN or PED vessels.

Portable models and single-element vessels

Multi-unit service

Portable Models

Flow capacities from 1 to 30 GPM. Designed to service multiple oil reservoirs with customized electrical requirements. Integral particulate filter and coalescer filter arrangement.

1–30 GPM · Wheeled or forklift-movable · Custom electrical
Side-stream

Single or Multiple-Element Vessels

Flow capacities to 20 GPM. Designed to side-stream part of the existing lube oil pump flow. Available in ASME code and non-code designs, with duplex configurations for uninterrupted flow during element changeout.

To 20 GPM · ASME or non-code · Duplex available · Auto drain optional

Coalescer and separator elements

Large inventory of replacement coalescer/separator elements available for immediate shipment.

Fuel Coalescer HC628-01-C

Originally developed for the U.S. Air Force for refueling B-1 bombers. Reduces moisture contamination in jet fuel from 5,000 ppm to under 10 ppm at 71 GPM per cartridge. Similar performance in No. 2 diesel at 36 GPM and ISO VG 32 lube oils at 5 GPM per cartridge.

Fuel Separator HS611-200-C

Hydrophobic screen element installed downstream from the coalescer. Its function is to prevent coalesced water drops from being swept out of the vessel by the fluid's velocity — ensuring complete water separation before oil returns to service.

Where coalescer/separators are installed

Power Plants

Steam turbine and gas turbine lube oil reservoirs. Combined-cycle and simple-cycle installations.

Refineries & Chemical

Process equipment lube systems, turbo-expanders, and compressor trains.

Compressors

Hydrogen compressors, wet gas compressors, and reciprocating compressor lube systems.

Need a coalescer/separator system sized for your reservoir?

Give us the reservoir volume, oil type, and current moisture levels. We'll confirm the right model and flow rate.

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