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Common Boiler Formulas - Differential Setting

What is the differential setting of an automatic pressure control that turns the burner ON at 80 psi and OFF at 105 psi?

△S = P1 - P2

                S = P1-P2

                S = 105 - 80

                S = 25

Where,

                △S differential setting delta

                P1 cut-out pressure delta

                P2 cut-in pressure delta


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