- Light Weight, Compact

- Integral Trap

- High Efficiency Over Wide Flow Range

- No Required Maintenance

- Economical Choice for Most Applications

- Removes 99% of Liquid and Solid Entrainment Particles Larger Than 10 Micron

- Gas, Steam or Air Applications


- Trap Heater

- ASME UM or U Code Stamp

Low Profile Design

The Type 31L-ST is a horizontal, in-line separator. It is very compact and can be supported by the line in which they are installed, no cumbersome, expensive support stands are required. The compact design of these separators take up little more than the space of the pipeline. An important consideration in space restricted applications.

Vortex Containment Plate

Moisture laden gas enters the inlet of the separator where it is deflected by Eaton’s unique CenpellarTM into a centrifugal motion. The entrained solids and moisture droplets are separated out by a reduction in velocity. Separated liquid and solids fall into the separators integral drain trap where Eaton’s exclusive Vortex Containment Plate (VCP) ensures that they cannot be re-entrained. The VCP is constructed with a series of carefully placed rings and plates that shield the separated liquid from the vortex action within the separator to prevent re-entrainment . The VCP also helps direct the liquid to the drain trap while at the same time moves the clean, dry gas to the separator outlet. With Eaton’s exclusive VCP the need for expensive, delicate baffles that are used in ordinary separators is eliminated.

Integral Drain Trap

All Eaton Type 31 L-ST Separators come with standard, integral drain traps. This design saves space, reduces installation costs and eliminates the need to properly size and source a properly designed drain trap to work with the separator. The integral trap automatically ejects the condensate at predetermined levels without loss of line pressure. Internal trap parts are made of stainless steel and include a non-magnetic 18-8 stainless steel valve and seat. Removal of a flange releases the trap mechanism for inspection. A heater option, Type STH, is also available for applications below freezing. A 50 watt, 100 volt, self limiting heating element keeps the reservoir fluid from freezing. The heater does not increase the line temperature and can be easily removed for inspection.

Expert Help is Available

Choosing the right gas/liquid separator can present unique problems not encountered in choosing other pipeline components. Why not take advantage of Eaton’s over 100 years of application experience with gas/liquid separators? Application specialists are available to help you every step of the way…from initial selection, to installation and through start-up…just contact us.

Engineering Specification

All gas/liquid separators shall be constructed of cast iron with (threaded or flanged) connections (with ASME Code Stamp. Separators will remove 99% of entrained liquid or particles 10 microns in size or larger when correctly installed. All separators shall have integral drain trap (with heater). Re-entrainment will be prevented by a Vortex Containment Plate. Separators shall be Eaton Eaton Type 31L-ST.

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