Equilibar Back Pressure Regulator
Unique pressure control technology for highly demanding applications.
Our dome-loaded back pressure regulators work in an entirely different way from traditional regulators. This unique approach provides incredible stability across widely varying flow rates and demanding process conditions.
How it works
Our unique regulators are dome-loaded, meaning that they get the set-point by an air or gas loading on the pilot reference port. This set-point can be provided by either an electro-pneumatic regulator or a manual gas regulator.
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
The result is a high performance regulator that performs across incredibly wide flow rate ranges, typically to within 1% precision for most gas applications.
Learn more
Critical Service Advantages
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.
Computer Automation
Our sensitive dome-loaded design makes automating your process pressure easy and precise. See an example of automated pressure control.
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 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.
High Pressure
Maximum pressure up to 5000 psig. Somewhat higher for custom applications. Learn details about our Instrument Series regulators.
High Temperature
Our stainless diaphragms can be used to 327C in many applications. Useful in petrochemical gas analysis and research using (high temperature).
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.
Aggressive Chemistry
Our many material options include 100% PTFE construction as well as Hastelloy C276 and SS316. Our products can be made compatible with virtually every aggressive chemical known. Details on chemical compatibility.
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.
Low Dead Volume
Our 1/16" tube fitting option provides for total dead volume of 0.2 ml. Useful for High Performance Liquid Chromatography and gas analysis services requiring low dead volume.
Note: the terms "Back Pressure Regulator" and "Back Pressure Valve" are often used interchangably. On this website, we prefer using the "Regulator" term to refer to both.
