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The function of a Helical Oil Separator is to remove oil from the

discharge gas and return it to the Compressor either directly or

through an Oil Management System.


Helical Oil Separators are typically used on multi-compressor refrigeration

racks or air conditioning units. They are primarily intended for use with scroll

and reciprocating type compressors, and not intended to be used with screw

or rotary vane compressors. Helical Oil Separators are intended for Low

Pressure Oil Management Systems. Helical Oil Separators are suitable for

use with HCFC and HFC refrigerants, and their associated oils, as well as

other industrial fluids non-corrosive to steel, copper and brass.

Main Features


*Patented Henry Technologies’ Design


ODS refrigerant connections


SAE flare or ODS oil connection


High oil removal efficiency - up to 99%


Low pressure drop


No moving parts within oil separation zone


Serviceable models available, S-52** series


1/8 NPT oil drain


Magnet on oil float to collect debris


Replacement parts available

Standard 3/8” flare oil return connection; 3/8” ODS oil return connection

available by ordering an “X” suffix (i.e. S-5292X).

Materials of Construction

The main components; shell, end caps and connections are made from

carbon steel. The float assemblies are made from stainless steel, brass and


Technical Specifications

Maximum working pressure = 450 PSI (31 Bar)

Allowable operating temperature = +15°F to +300°F (-10°C to +149°C)

Henry Technologies’ Helical Oil Separators are UL and C-UL Listed by

Underwriters Laboratories, Inc. Additionally, Helical Oil Separators are

designed and registered for use in Canada. Please contact Technical

Support at 1-800-627-5148 for CRN details and list of approved provinces

and territories.

How it Works

The Helical Separator does not rely on any moving parts for oil separation.

As the oil laden hot gas enters the separator it is directed in a spiral motion

around a helical flighting. The centrifugal forces act on the gas/oil mixture

causing heavier oil particles to spin to the perimeter where they impact an

internal screen. The screen layer functions as both an oil stripping and

draining medium. Separated oil flows downward along the boundary of the

shell through a baffle and into an oil collection chamber. The specially

engineered baffle isolates the oil collection chamber and eliminates oil re-

entrapment by preventing turbulence. The virtually oil free refrigerant gas

then exits through a screen fitting just below the lower edge of the helical

flighting. Oil flow out of the separator is controlled by an oil float assembly in

the bottom of the collection chamber. The oil may be returned directly to the

compressor or to an Oil Management System.

Installation - Notes

Full instructions are given in the Oil Level Control Manual, included with each



Selection Guidelines

Henry Technologies' Helical Oil Separators rely on adequate gas velocities to

allow for oil extraction from the hot gas so sizing according to the DCFM

rating is important. The Helical Oil Separator DCFM Rating table shows the

min/max ratings allowed for sufficient separation and low pressure drop.

When sized correctly the helical models will separate up to 99% of the oil

from the hot gas. Please contact Technical Support at 1-800-627-5148 for

assistance or recommendations when selecting Oil Separators.