70B Blue Solid Cone Burner Nozzle 1.25 GPH – OEM Replacement Part
Part Number: 1331
Category: Pressure Washer Parts → Burner Components → Burner Nozzles
Type: Delavan 70B Solid Cone Oil Burner Nozzle
The Delavan 70B Blue Solid Cone Burner Nozzle 1.25 GPH is a precision-engineered oil burner nozzle designed to deliver reliable ignition, efficient fuel atomization, and consistent combustion performance in hot water pressure washers, oil-fired heating systems, boilers, and industrial burner applications. Featuring a 70-degree solid cone spray pattern and 1.25 gallon per hour (GPH) flow rate, this nozzle provides uniform fuel distribution throughout the entire spray pattern for dependable burner operation.
Key Features & Benefits
- Genuine Delavan OEM burner nozzle
- 1.25 GPH fuel flow rate
- 70-degree spray angle
- Type B solid cone spray pattern
- Uniform fuel distribution throughout the spray cone
- Reliable ignition performance
- Efficient fuel atomization
- Stable flame characteristics
- Improved combustion efficiency
- Precision-machined internal components
- Integrated sintered filter for contamination protection
- Durable construction for long service life
- ISO 9001 certified manufacturing
Technical Specifications
Part Number: 1331
Manufacturer: Delavan
Series: Type B Solid Cone
Size: 70B 1.25
Flow Rate: 1.25 GPH
Spray Angle: 70°
Spray Pattern: Solid Cone
Color Code: Blue
Thread Size: 9/16"-24
Fuel Type: Fuel Oil
OEM Replacement: Yes
Certification: ISO 9001 Certified
Type B Solid Cone Spray Pattern Advantages
The Delavan Type B design provides:
- Uniform droplet distribution throughout the complete spray pattern
- Excellent fuel-air mixing
- Smooth burner startup and ignition
- Stable flame development
- Efficient combustion characteristics
- Consistent heat output
- Reliable burner performance
While Type B nozzles become progressively more hollow at very high flow rates, particularly above 8.00 GPH, the 1.25 GPH model maintains excellent solid cone distribution for optimal combustion performance.
Advanced Design Features
- Precision-machined spray components
- Optimized spray uniformity
- Reduced distributor size for improved reliability
- Shorter tangential slots to help prevent plugging
- Aerodynamic nozzle body configuration
- Rolled threads to eliminate chips and burrs
- Sintered filter sized for maximum protection
- Factory tested and cleaned before shipment
Typical Applications
- Hot water pressure washer burners
- Oil-fired heating systems
- Commercial burner assemblies
- Industrial combustion equipment
- Boilers and furnaces
- Agricultural heating systems
- Mobile wash units
- Asphalt maintenance equipment
- Burner repair and maintenance applications
Performance Benefits
- Dependable burner ignition
- Consistent combustion quality
- Efficient fuel atomization
- Stable flame formation
- Improved burner efficiency
- Uniform fuel delivery
- Reduced maintenance requirements
- Long operational service life
Signs a Burner Nozzle May Need Replacement
Replace the nozzle if you notice:
- Delayed ignition or hard starts
- Excessive smoke production
- Poor flame quality
- Reduced heating efficiency
- Increased fuel consumption
- Carbon buildup
- Burner instability
- Restricted fuel flow
Installation Notes
- Disconnect power and fuel supply before servicing.
- Remove the existing nozzle carefully.
- Inspect fuel filters and supply lines for contamination.
- Install the replacement nozzle according to equipment manufacturer specifications.
- Verify the flow rate, spray angle, and spray pattern match burner requirements.
- Test burner operation after installation.
- Adjust combustion settings if required.
Important: Always install the exact nozzle size, spray angle, and spray pattern specified by the burner manufacturer to maintain safe operation and proper combustion efficiency.
Maintenance Recommendations
- Replace burner nozzles during routine maintenance intervals.
- Keep fuel systems clean and free of contamination.
- Inspect fuel filters regularly.
- Monitor flame quality and burner performance.
- Verify fuel pressure settings during service.
- Replace worn nozzles promptly to maintain optimal efficiency.
