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Premier Control Technologies Fluid Solutions

Supercritical BR Series

  • Non-Clogging, Blocking and Freezing
  • Precision within 2%
  • Pressure up to 413 Bar
  • Temperature up to 300°C

Non-Clogging Supercritical Fluid Back Pressure Regulator

In response to the challenges faced by customers involved with such diverse applications as solvent replacement, active ingredient extraction and nanotechnology research Equilibar has designed a blockage resistant back pressure regulator. This unit is ideal for specialty applications, particularly supercritical back pressure CO2 extraction applications as mentioned above, however, it is also highly effective within any process where clogging, blocking, or freezing could be an issue.

This unit integrates proprietary design features to assist customers in achieving precision control by reducing the Joule-Thomson effect of supercritical process fluids passing through the unit. A primary design feature of this regulator is a downstream expansion cavity that provides a continuously increasing cross-sectional area that eliminates convergence points for ice buildup. Additionally, this large thermal mass provides increased heat transfer area to heat the outlet fluid through several different means. Lastly, this unit has specially designed O-ring grooves to reduce stress during rapid decompression to increase O-ring lifetimes. This unit has several different fitting options, including an outlet flange, tube stub, or NPT fittings.

Built Tough to Withstand the Supercritical Back Pressure Extraction Environment

The Supercritical BR1 series is not a standard back pressure regulator simply being pressed into service for supercritical back pressure let-down in supercritical extraction systems. The BR1 (patent pending) is designed from a clean sheet to specifically address the demands encountered when rapid cooling occurs as a supercritical gas expands during decompression. The body is CNC machined from premium stainless steel 316/316L dual cert alloy bar stock. The diaphragm material choices include polyimide, PTFE, and PEEK depending on the co-solvents used and the maximum temperatures. O-ring cavities are designed to limit the explosive decompression that occurs when the SCO2 permeates the o-ring material. O-ring choices include Buna-N, Viton, PTFE, and DuPont Kalrez as determined by your application. The flexible diaphragm membrane is the only moving part. This membrane directly seals against field of multiple parallel orifices. The shape of the internal passages prevents the accumulation of ice or viscous oils so that the BR1 remains free to keep the pressure regulated at your target set point.


Common process applications and industrial uses include:

  • Supercritical CO2 extraction process
  • Mixed phased applications
  • Ultrapure and aggressive chemicals
  • Blockage resistance regulator

For more information on the Supercritical BR Series please feel to contact us.

Other features

Supercritical CO2 Pressure Regulator Resists Blockage

Port Sizes:

  • 1/4" NPT (B6R-2E & B6R-2K)
  • 3/8" NPT (B6R-3E & B6R-3K)

- 6000 PSI max pressure

- Max temperature up to 300C

Useful article


The Supercritical BR Series is widely used in the following industries:

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