135 PSI Supply Pump/125 PSI Valve Open/65 PSI Valve Close, Valve for Oil Burner. The all-new Delavan ProTek® Nozzle System provides the first step into the future of Clean Air Technology®. This unique, patented System from Delavan provides significant reductions in combustion pollutants for cleaner air. Minimum operating pressure for 60030-001: Supply Pump PSI (Bar) = 135.0 (9,3), Valve Open PSI (BAR) = 125.0 (8,6), Valve Close PSI (BAR= 65.0 (4,5)