Back Pressure Regulator

Unique pressure control technology for highly demanding applications.

Unique pressure control technology for highly demanding applications.

Our patented back pressure regulator design uses a flexible diaphragm with multiple orifices to maintain an incredibly sensitive pressure balance between the inlet port pressure and the pilot reference pressure.

Equilibar Performance Comparison

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Equilibar Custom Solutions

Custom Back Pressure Regulator Made to Your Specifications

Port Sizes: Any Pipe Size, Any Fitting Type

Pressure Ranges: As low as 0 – 1 in WC, As High as 10,000 psig

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Key Advantages of Equilibar Back Pressure Regulators

High Precision

Inlet pressure matches reference pressure within 1-2% through wide flow range - better than 0.5% in most research applications. Frequenty used in industrial test benches for liquids and gases. See performance curves.

Aggressive Chemistry Compatibility

Our many material options include 100% PTFE construction as well as Hastelloy C276 and SS316L. Our products can be made compatible with virtually every aggressive chemical known. Details on chemical compatibility.

High Pressure

Our back-pressure regulator has maximum pressure up to 5000 psig. Somewhat higher for custom applications. Learn details about our Research Series regulators.

Low Dead Volume

Our 1/16" tube fitting option provides for total dead volume in our back pressure regulator of 0.2 ml. Useful for High Performance Liquid Chromatography and gas analysis services requiring low dead volume.

Wide Flow Range

Our unique technology allows for precision across a 1000:1 flow range in most applications. Up to 10,000:1 in many research applications.

Two-Phase Flow

Our unique design allows for liquids and gases to flow together while maintaining incredible inlet pressure stability. Our multiple orifice design is ideal for minimizing pressure disturbances in two-phase flow.

High Temperature

Our stainless diaphragms can be used to 300C in many applications. We also have a beta regulator for applications to 450C. Useful in petrochemical gas analysis and research that use high temperature reactors.

Ultra Low Flow

By far the lowest flow rate available, down below Flow Coefficient 1E-8 (<0.1 ml/min gas or 0.001 ml/min liquid). Details on our ultra low flow rate performance.

Ultra Low Pressure

Using delicate diaphragms, our technology gives precision down to 0.02 psig (0.5 inWC). See details of our low pressure regulators.

Learn more

Click Here to learn more about how our back pressure regulators work. What is a back pressure regulator? Learn more
Note: the terms "Back Pressure Regulator" and "Back Pressure Valve" are often used interchangeably. On this website, we prefer using the "Regulator" term to refer to both.