Performance Curves

Equilibar Back Pressure Regulator

The performance curve below demonstrates what is most unique about the Equilibar® back pressure regulator. The chart shows virtually flat-line pressure stability across over 6 orders of flow rate magnitude. By using several different diaphragms, the same regulator body can also be used to control pressures from less than 0.1 psig / .006 bar(g) to above 1000 psig / 68.9 bar(g). Controls down to extremely low flow rates.

Performance curves can vary according to port size and diaphragm selection.

The Equlibar has high performance across an ultra wide flow rate window
1/8″ Research Series EB1LF1 performance curve


high precision back pressure regulator

The Equilibar precision back pressure valve provides stable inlet pressure across widely varying flow rates and application conditions. Learn how it works.


See Equilibar precision in action:


Precision for Larger Back Pressure Regulators

The precision of larger back pressure regulators is theoretically the same as with smaller Research units, as described above. However, in practice, larger BPRs are typically sized to achieve a good balance between needed precision and economical body sizing. For example, a 3/4″ BPR might provide a pressure build of 5% at full water flow capacity, whereas a 1″ BPR might have precision in the 2% range. Depending on the accuracy requirements and the user’s budget, your application engineer can help you size a model to meet all your requirements.

Precision at Different Pressure Ranges

Theoretically, it is possible to achieve the same % precision at low pressure set-points as it is with high pressure set-points. However, in practice, this is rarely achieved. In order to achieve excellent precision at lower differential pressures, it is necessary to over-size the unit such that the friction from fluid moving through the passages is small relative to the available pressure differential. In ultra-low pressure application, this is rarely achieved due to the economics of supply very large regulators.

Equilibar News

andrew roberts

Team Member Spotlight: Andrew Roberts, Assembly Technician

We are happy to introduce Andrew Roberts, our amazing assembly technician, who is able to build seemingly infinite configurations of Equilibar back pressure regulators and vacuum control valves. Long-time clients and partners may remember Andrew.  He worked for Equilibar several years ago before taking a break to join the thriving beer brewing industry in Western […]

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