Choose a flat fan nozzle when the process needs a narrow fan-shaped sheet, controlled overlap along a header or concentrated line impact. Choose a full cone nozzle when liquid must fill a circular or square impact area. The correct pattern depends on target motion, required distribution, flow, pressure, installation distance and liquid condition.
Flat Fan vs Full Cone at a Glance
| Selection factor | Flat fan | Full cone |
|---|---|---|
| Impact shape | Fan-shaped sheet with a line-like footprint | Filled circular or square footprint |
| Typical target | Moving surface or header requiring controlled overlap | Stationary area needing broad wetting |
| Impact concentration | Concentrated across a narrower band | Distributed across a larger area |
| Header concern | Fan alignment and tapered-edge overlap | Footprint spacing, orientation and pressure balance |
| Main verification | Streaks, gaps and line impact | Centre, edge and full-area distribution |
Choose Flat Fan for a Moving or Linear Target
A flat fan is a practical starting point when parts, sheet, strip or a conveyor passes through a defined spray line. Several flat fan nozzles can be arranged along a header, but angle, spacing, height and orientation must be controlled to avoid streaks or dry bands.
Review the Jeltecn flat fan nozzle range and the flat fan selection guide.
Choose Full Cone for Filled-Area Coverage
A full cone is the usual starting point when liquid is needed throughout a circular or square target. It can support stationary washing, cooling, quenching and process-liquid distribution when the selected flow and footprint fit the application.
Review the Jeltecn full cone nozzle range and the full cone selection guide.
Is Flat Fan Always Higher Impact?
Do not assume one pattern is always higher impact. Impact depends on flow, pressure, angle, spray distance, model geometry and the area over which momentum is distributed. Compare candidate models under the intended operating condition.
Selection by Application Geometry
| Process geometry | Starting pattern | What to verify |
|---|---|---|
| Moving strip or conveyor | Flat fan | Fan alignment, overlap and line speed |
| Stationary circular target | Full cone | Diameter, centre and edge distribution |
| Rectangular stationary area | Square full cone or flat fan header | Grid layout, overlap and pressure balance |
| Target requiring concentrated cleaning band | Flat fan | Impact, distance and surface tolerance |
| Broad cooling or quenching area | Full cone | Flow distribution and complete process result |
Seven Questions Before Choosing
- Is the target moving or stationary?
- Does the process need a spray line or a filled area?
- What flow is required at the pressure available at the nozzle?
- What mounting distance and clearance are available?
- How will adjacent patterns overlap?
- What liquid, material and filtration conditions apply?
- How will the installed coverage be measured?
Header Design Difference
A flat fan header is normally evaluated for fan alignment, edge overlap and distance from a moving or stationary surface. A full cone header is evaluated for footprint size, pattern orientation, complete area coverage and pressure balance. Use the square full cone header guide when designing a rectangular full-cone grid.
RFQ Information
Send the application, target dimensions and motion, required flow, available pressure, spray distance, liquid details, connection, material, quantity and any header drawing. Jeltecn is a registered brand of Melinco Precision Technology Co., Ltd.
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