01953 609930Back pressure regulators
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. Each back pressure regulator utilises a patented multi-orifice design for friction-free, ultra-wide flow control across aggressive media, supercritical fluids, sanitary processes, and high-temperature environments.
Product range
Comparing Equilibar® Back Pressure Regulator Series
Compare all 10 device configurations below.
| Series / Model | Target Application | Port Sizes | Max Pressure | Max Temp | Key Advantage / Core Feature |
|---|---|---|---|---|---|
| Research Series | Laboratory & Gas Analysis | 1/16", 1/8" and 1/4" | Up to 10,000 psig (690 bar) | Up to 450°C | Ultra-low flow capability with unmatched 1:100,000 turndown ratio for catalysis reactors and analytical R&D. |
| General Service (GSD) | Gas, Liquid & Mixed-Phase | 1/4" to 1" | Up to 2,500 psig (172 bar) | Up to 300°C | 2-piece bar-stock design offering fast, stable pressure control across general process lines and fuel cell testing. |
| Industrial High Flow (IC) | High-Capacity Industrial Lines | 1.5", 2", and 3" | Up to 300 psig (20.6 bar) | Process Dependent | ASME B16.34 compliant cast body; direct drop-in replacement for traditional industrial relief valves. |
| Industrial Service (BD) | High Flow & Viscous Media | 1.5" to 4" | Up to 400 psig (27 bar). | Up to 200°C | Large orifice geometry engineered for high flow rates, slurries, and high-viscosity process liquids. |
| Sanitary Series (FD) | Food, Bev & Personal Care | 1/4" 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 Bioprocessing | 1/8" to 1" (Single-Use) | Up to 60 psig (4 bar) | -40°C to 93.3°C | Designed specifically for tangential flow filtration (TFF) and single-use biopharma dosing lines. |
| Supercritical (BR) | sCO2 & Blockage-Prone Media | 1/4" to 3/8" | Up to 6,000 psig (413 bar) | Up to 300°C | Engineered to prevent Joule-Thomson freezing and phase-change clogging in supercritical extraction. |
| Mity Mite Series | Direct Retrofit / Legacy Replacement | 1/8" to 1/4" | Up to 6,000 psig (413 bar) | Up to 300°C | Direct, 1:1 footprint replacement for traditional, obsolete Mity Mite style regulators. |
| High Temperature (HT) | Extreme Hot Gas / Oven Systems | 1/16" to 1/4" | Up to 5,000 psig (344 bar) | Up to 450°C | Utilizes graphite or metallic diaphragms for ultra-high temperature reaction and combustion research. |
| Vacuum Series (EVR) | Precision Vacuum Control | 1/4" 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
- 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.
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
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Help and advice
A member of our team will be happy to assist with any questions you may have.