Supercritical Back Pressure Regulator

Non-Clogging Supercritical Fluid Back Pressure Regulators

Equilibar is pleased to introduce the blockage resistant BR Series back pressure regulators. This series is ideal for specialty applications, particularly supercritical CO2 extraction applications, but is also useful for any process in which clogging, blocking, or freezing could be an issue.

This series integrates proprietary design features to help customers achieve precision control by reducing the Joule-Thomson effect of supercritical process fluids passing through the unit. A primary design feature in this regulator series is a downstream expansion cavity that provides a continuously increasing cross-sectional area to eliminate 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 series has specially designed O-ring grooves to reduce stress during rapid decompression, increasing O-ring lifetimes. This series has several custom fitting options, including an outlet flange, tube stub, or NPT fittings.

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Watch the BR regulate to a precise pressure even while the unit spits out chunks of ice and oil.

Built to Withstand the Supercritical Extraction Environment

The BR Series (patent pending) is designed specifically to address the demands encountered when rapid cooling occurs as a supercritical gas expands during decompression.

  • The shape of the internal passages prevents the accumulation of ice or viscous oils so the BR is free to regulate at the target setpoint.
  • The body is CNC machined from premium stainless steel 316/316L dual cert alloy bar stock.
  • The diaphragm material options include polyimide, PTFE, and PEEK depending on the co-solvents used and the maximum temperatures reached.
  • O-ring cavities are designed to limit the explosive decompression that occurs when the SCO2 permeates the O-ring material.
  • O-ring material options include Buna-N, Viton, PTFE, and DuPont Kalrez depending on the application.

 Application Spotlight


image of B6R blockage resistant back pressure regulator for supercritical use

Equilibar B6R blockage resistant back pressure regulator designed specifically for use in supercritical applications.

Supercritical Back Pressure Regulator for Fluid Extraction

Equilibar BR series model
with custom tube stub
connections option

ice resistant blockage resistant back pressure regulator

Ice is ejected from blockage resistant BR back pressure regulator while maintaining precise pressure control (Note: Bottom plate removed for visualization. Multiple orifices would typically be used)

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Schematic of pressure control for product filling machine

Application Spotlight: Sanitary Product Filling

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