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Premier Control Technologies Fluid Solutions

Back pressure regulators

Offering a range of Back Pressure Regulators for a variety of applications

Comparing Equilibar® Back Pressure Regulator Series

Equilibar dome-loaded back pressure regulators utilize a patented multi-orifice design for friction-free, ultra-wide flow control across aggressive media, supercritical fluids, sanitary processes, and high-temperature environments. Compare all 10 device configurations below.

Series / ModelTarget ApplicationPort SizesMax PressureMax TempKey Advantage / Core Feature
Research SeriesLaboratory & Gas Analysis1/16", 1/8" and 1/4"Up to 10,000 psig (690 bar)Up to 450°CUltra-low flow capability with unmatched 1:100,000 turndown ratio for catalysis reactors and analytical R&D.
General Service (GSD)Gas, Liquid & Mixed-Phase1/4" to 1"Up to 2,500 psig (172 bar)Up to 300°C2-piece bar-stock design offering fast, stable pressure control across general process lines and fuel cell testing.
Industrial High Flow (IC)High-Capacity Industrial Lines1.5", 2", and 3"Up to 300 psig (20.6 bar)Process DependentASME B16.34 compliant cast body; direct drop-in replacement for traditional industrial relief valves.
Industrial Service (BD)High Flow & Viscous Media1.5" to 4"Up to 400 psig (27 bar).Up to 200°CLarge orifice geometry engineered for high flow rates, slurries, and high-viscosity process liquids.
Sanitary Series (FD)Food, Bev & Personal Care1/4" to 3"Up to 150 psig (10 bar)Up to 150°C (diaphragm dependent)USP Class VI / FDA compliant wetted materials; crevice-free design for rapid clean-in-place operations.
Biopharmaceutical (SD)Single-Use Bioprocessing1/8" to 1" (Single-Use)Up to 60 psig (4 bar)-40°C to 93.3°CDesigned specifically for tangential flow filtration (TFF) and single-use biopharma dosing lines.
Supercritical (BR)sCO2 & Blockage-Prone Media1/4" to 3/8"Up to 6,000 psig (413 bar)Up to 300°CEngineered to prevent Joule-Thomson freezing and phase-change clogging in supercritical extraction.
Mity Mite SeriesDirect Retrofit / Legacy Replacement1/8" to 1/4"Up to 6,000 psig (413 bar)Up to 300°CDirect, 1:1 footprint replacement for traditional, obsolete Mity Mite style regulators.
High Temperature (HT)Extreme Hot Gas / Oven Systems1/16" to 1/4"Up to 5,000 psig (344 bar)Up to 450°CUtilizes graphite or metallic diaphragms for ultra-high temperature reaction and combustion research.
Vacuum Series (EVR)Precision Vacuum Control1/4" to 4"0 to 29.5 inHg (g)Up to 60°C (higher temp models are available)Precision vacuum regulation holding stable sub-atmospheric pressures down to fractional mbar.

Introduction to our range of BPR's

Our range of back pressure regulators (back pressure controllers) are all manufactured by Equilibar. We distribute for a variety of applications which include vacuum, industrial, high temperature, sanitary, general use as well as for research and development.

  • The GS series is our general service back pressure regulator series which is available in a variety of metallic or polymer materials and is suitable for liquid, gas or mixed phase applications.
  • The BD series is available in pipe sizes up to 4” and again is suitable for liquid, gas or mixed phase applications.
  • The FD series are for use within sanitary processes and are CIP/SIP ready with USP class VI traceability.
  • Supercritical fluids can be regulated with the BR series, pressures up to 413 bar and temperatures up to 300C.

1/16" to 1/4" - Laboratory and Gas Analysis Systems

1/4" to 1" - Gas, Liquid and Mixed Phases

1 1/2" to 4" - Larger sizes and higher flows

1/4" to 3" - Biopharma and Hygienic Industry

The Benefits of Equilibar Back Pressure Regulators

The video below shows an exploded view of the Dome loaded back pressure regulator, and how it maintains pressure control downstream of a process

The key benefits of this range of BPR's

  • Very fast stable control
  • Ultra-high precision
  • Rangeability from 1:100,000 up to 1:1,0000,000
  • Vast range of wetted materials
  • Vacuum to positive pressure in one device
  • Control up to 10,000 psi (700 Bar)
  • Temperature capability up to 700 C
  • Suitable for Super-Critical Fluids
  • Suitable for Multi-Phase Service
  • Tolerant of High Viscosity Fluids
  • Direct replacement for obsolete Mity Mite

Frequently asked questions

A back pressure regulator maintains a set pressure upstream by releasing excess pressure downstream. It ensures stable system performance by relieving pressure when it exceeds a defined threshold.
Back pressure regulators are used in analytical instrumentation, chemical dosing, fuel cell systems, bioprocessing, and gas chromatography to maintain upstream pressure stability in low-flow and high-precision environments.
A pressure regulator controls downstream pressure, while a back pressure regulator controls upstream pressure. Back pressure regulators are essential when excess pressure needs to be relieved from a system or process line.
Yes. PCT offers regulators with wetted materials such as stainless steel, Hastelloy, and PTFE to ensure chemical compatibility with aggressive or corrosive media.
Our regulators support a wide range of flow capacities from a few millilitres per minute up to litres per minute, with pressure control ranges from below 1 bar up to 100 bar depending on the model.
Yes. We supply both manual and electronically controlled (closed-loop) back pressure regulators, giving users precise control for static or dynamic pressure applications.
Absolutely. Our back pressure regulators are designed to handle both gases and liquids, provided the correct elastomer and body materials are selected for the media in question.
Depending on the model and application, pressure control accuracy can be as tight as ±0.1% of full scale. Digital control options offer enhanced accuracy and repeatability for sensitive processes.
Yes. Many of our electronic back pressure regulators offer analog or digital communication (e.g., 0–10 V, 4–20 mA, RS232, Modbus), allowing for integration into PLCs, SCADA, or lab automation systems.
Definitely. Our technical team will assist in choosing the right model based on your media type, flow rate, pressure range, and control method. We also support custom configurations for OEM or specialist applications.

To learn about the different applications and uses Equilibar back pressure regulators are often undertaking, read our technical article 20 Industrial & Research Applications for Back Pressure Regulators

Help and advice

A member of our team will be happy to assist with any questions you may have.

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