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Ratio Regulators
The ES-Series ratio regulators are used in applications where gas to air
proportional flow is required. The gas flow is controlled as a function of
the air pressure through a loading line which connects into the top of the
regulator.
As the system air pressure increases, it forces the ratio regulator valve to
open causing the outlet pressure to increase until the two pressures balance.
As the load line pressure increases, the ratio of the outlet pressure to the
load line pressure will be slightly less than 1:1.
The ratio regulators have a bias adjustment for varying the gas flow when setting
the burner at low fire. It can be used to increase or decrease the gas flow
resulting in gas rich or lean combustion. The adjustment is restricted in the
gas rich direction, therefore, limiting the gas flow at zero air pressure.
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