Fuel Pump Testing

Improving Fuel Pump Testing with Back Pressure Regulation

Automotive and aircraft

  • Equilibar schematic fuel pump testing

In fuel system component testing, it is desirable to perform development and quality assurance tests at or close to actual operating conditions. This means varying the back pressure and the rpm of the unit(s) during the testing cycle. Varying speed is a well known process, but varying back pressure may get complicated or costly. Equilibar Back pressure regulators can simplify the design of the test rig and provide reliable service under high cycle service.

In the schematic below, the pump under test provides flow to an Equilibar back pressure regulator which has a pneumatic pilot signal from an electro-pneumatic controller driven by test computer with the desired rpm, flow and pressure sequences.

equilibar fuel pump testing applications diagram

The tests can simulate the actual service conditions of varying loads and speeds enabling a better prediction of performance in use. Same test stand can be used for quality assurance product tests.

Benefits: The pressures can be cycled rapidly to create high cycle style life tests in a relative short period of time, as the Equilibar regulator has a flexible diaphragm as its only moving part.

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Equilibar 3/8

3/8″ Equilibar Back Pressure Regulator

Equilibar regulators used in cold service fuel system testing

Equilibar GS3 back pressure regulators used in winter fuel system testing

Equilibar GS Series Brochure

GS Series Brochure

Watch the video below of how the Equilibar Back Pressure Regulator controls the flow of a pump.

Control the Flow of a Pump With a Back Pressure Regulator

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Jeff Jennings, Equilibar president, with schematic

Seven Ways to Dome Load

Equilibar’s back pressure regulators (BPRs) are dome loaded.  This means that the pressure setpoint is provided by a fluid that is fed into a chamber on the top (dome) of the regulator. The pressure of the fluid (either gas or liquid) is set by a second regulator called a pilot regulator.  The loading mechanism is Read More

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