Glossary
Pressure regulator
Definition
Device in the fuel line that holds the fuel output reproducible relative to the regulator position.
A volume or pressure regulator sits in the fuel line between the pump and the burner and makes the fuel output reproducible for a given regulator position. Together with the return-flow line of a spill-back atomizer it is what turns a fixed-output nozzle into a modulated burner.
Fluid Control Instruments Ltd publishes the regulator characteristics as output curves rather than as a single figure, because the output depends on the regulator opening, the pressure drop across the regulator and the viscosity. The published curves are taken at 90° open, viscosity 5 cSt and a constant pressure drop over the regulator.
Three types are available: TYPE 24, TYPE 32 and TYPE 40, each with its drawing, output characteristics in English and German, and a manual in the documentation library.