Delavan 3.50-70-b 3.50 Gph 70 Degree Type B Solid Cone Oil Burner Nozzle

Product Description

The Delavan 3.50-70-b is a Type B Solid Cone oil burner nozzle designed for residential heating systems. It delivers a flow rate of 3.5 gallons per hour at a spray angle of 70 degrees. This nozzle is built for use in oil-fired furnaces, boilers, and water heaters where consistent combustion performance is required. HVAC technicians and oil burner service professionals rely on nozzles like this one to keep heating systems running efficiently throughout the heating season. The solid cone spray pattern distributes fuel droplets fairly uniformly across the full spray pattern. This uniform distribution supports smooth ignition and clean combustion, which helps reduce soot buildup and keeps heat exchangers cleaner over time. At flow rates above 8.00 gallons per hour, the solid cone pattern can become progressively more hollow, but at 3.5 GPH this nozzle performs within its optimal range. The 70-degree spray angle makes this nozzle well suited for a range of residential burner applications, fitting burner combustion head geometries that call for a medium spray angle. The brass body provides corrosion resistance and durability in fuel oil environments. The steel orifice disc gives the nozzle a precise, consistent spray opening that maintains accurate flow rates over time. A Monel strainer filter is built into the nozzle to help prevent debris from clogging the orifice, extending service intervals and protecting burner performance. This nozzle meets ISO 9001 quality standards, which means it is manufactured under a documented quality management system. It is rated for use at 100 PSI operating pressure and a temperature of 80 degrees Fahrenheit. When replacing an oil burner nozzle, matching the flow rate, spray angle, and spray pattern type is critical to maintaining proper air-to-fuel ratios and combustion efficiency. The Delavan 3.50-70-b covers all three specifications for residential oil burner service and replacement work.

• Type B Solid Cone spray pattern distributes droplets uniformly for smooth ignition and efficient combustion
• Brass body and steel orifice disc construction for durability and precise flow in fuel oil service
• Built-in Monel strainer protects the orifice from debris and helps maintain consistent nozzle performance

Product Highlights

The Delavan 3.50-70-b delivers reliable 3.5 GPH fuel flow at a 70-degree solid cone spray angle, making it a dependable replacement nozzle for residential oil burners. Its brass and steel construction and Monel strainer support long service life and consistent combustion performance.

Product Information

Standard Information

• Brand: DELAVAN
• Manufacturer Part Number: 3.50-70-b

Technical Specifications

• Product Type: Oil Burner Nozzle
• Spray Pattern: Type B, Solid Cone
• Flow Rate: 3.5 GPH
• Spray Angle: 70 Degree
• Pressure Rating: 100 PSI
• Temperature Rating: 80 Deg F
• Material: Brass Body, Steel Orifice Disc
• Filter Type: Monel Strainer
• Application: Residential
• Applicable Standard: ISO 9001