Pulsation Dampening Regulator -

Pulsation Dampening Regulator

Minimizing pressure disruptions using back pressure valves

  • Equilibar schematic for pulsation dampening

The Equilibar back pressure regulator can be used to reduce pulsations in circulating liquid systems, such as used with positive displacement pumps.

A very common use of back pressure regulators is to control pump pressure in a loop where a portion of the flow can be returned to the supply reservoir. The outlet pressure of any type of pump can easily be controlled in this manner. Where the pump is a positive displacement type, the higher pressure spikes will be preferentially reduced by the back pressure regulator due to its essential nature.

The Equilibar back pressure regulator uses very thin diaphragms loaded with compressible gas, making the device more sensitive to small changes in pressure than traditional spring-loaded BPRs. Most Equilibar BPRs are sensitive to pressure changes as small as 0.01% of overall set-point.

The Equilibar gas-loaded diaphragm also provides a very significant pulsation dampening effect just upstream of the valve orifice. Traditional pulsation dampeners consist of a flexible membrane (typically rubber) with a pre-loaded air charge on the non-wetted side. The Equilibar back pressure regulator provides a very similar geometry, allowing the diaphragm to absorb a portion of the pulsations through the very close agreement between the wetted fluid pressure and the gas charge pressure.

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 Integrated Lab Solutions addresses pulsation problem with LF Series Back Pressure Regulator

Berlin-based Integrated Lab Solutions, Gmbh (ILS) builds high-throughput test systems for catalyst research around the world. Project Leader Claudia Berger-Karin successfully addressed a critical challenge caused by pulsations coming from an HPLC pump in a liquid reactant injection system. A Bronkhorst Cori-flo mass flow controller was being used to control the injection, and the HPLC pump was needed only to supply the pressurized reactant. She replaced the spring-loaded back pressure regulator with Equilibar LF BPR and was able to remove virtually all of the flow variation in the system.

Read Customer Case Study: Pulsation Dampening in Catalyst Research Systems: Equilibar® Back Pressure Regulator Eliminates Disruptive Pump Pulsation

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Pulse dampening schematic using back pressure regulator

Pulse dampening schematic using back pressure regulator

GSD4 General Service Back Pressure Regulator

1/2″ GS4 back pressure regulator can be used to minimize pump pulsations.

customer case study for pulsation dampening
Case Study: Equilibar® Back Pressure Regulator Eliminates Disruptive Pump Pulsation


Watch the video below of how the Equilibar Back Pressure Regulator works.

How Equilibar Back Pressure Regulator Works

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schematic of simple open loop level control with Equilibar back pressure regulator and EPR 3000

Equilibar Technology: A Good Choice for Complex Level Control

While Equilibar technology is known as the gold standard for back pressure control, its unique qualities offer advantages for complex level control applications as well. Using an Equilibar unit for level control could be a good choice in circumstances where there is a wide range of flow rates, varying flow coefficients, varying downstream pressure or Read More

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