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AFF - Flat fan spray nozzle

AFF flat fan nozzle is used for water mist and offshore fire suppression, with FM Approval certification. The nozzle creates a coarse atomisation with medium impact spray. The spray angle is extra wide, 145°.

All 1/2" AFF nozzles require a line strainer designed to entrap material 1/8" and larger.

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AFF flat fan nozzle is used for water mist and offshore fire suppression, with FM Approval certification. The nozzle creates a coarse atomisation with medium impact spray. The spray angle is extra wide, 145°.
Illustration av hur sprayen skapas av en deflektor flatstråledysa. Dysan skapar en spray med extra bred sprayvinkel
FM Approved
AFF flat fan nozzle is used for water mist and offshore fire suppression, with FM Approval certification. The nozzle creates a coarse atomisation with medium impact spray. The spray angle is extra wide, 145°. Illustration av hur sprayen skapas av en deflektor flatstråledysa. Dysan skapar en spray med extra bred sprayvinkel FM Approved

Design features

  • Extra wide spray angle
  • Medium impact spray
  • Coarse atomisation
  • Fire certification Factory Mutual (FM) approval
  • All 1/2" AFF nozzles require a line strainer designed to entrap material 1/8" and larger.
  • Spray coverage at a certain height of installation is shown in the datasheet listed under Documentation & videos.
Spray patternFlat fan - Deflector spray
Spray angle145°
Flow rate31.6 - 264 l/min
Standard material - Body & Cap NutBrass, 316
Connection1/2" - 3/4" BSP/NPT
DimensionsSee Datasheet

Flow rates, spray angles & connections

If a specific pressure is not listed below or in the nozzle datasheet, it is possible to calculate the nozzle flow rate at a given pressure by using the equation at the bottom of the datasheet.

Flow rate (l/min) @ Differential pressure (bar), Density (1 SG)
Nozzle numberConnectionSpray angle3 bar5 bar7 bar9 bar10 bar
AFF1.181/2"145°-38,045,051,053,8
AFF1.661/2"145°-53,463,271,775,6
AFF2.531/2"145°-81,696,6110115
AFF3.353/4"145°-108128145153
AFF4.433/4"145°-143169192202
AFF5.693/4"145°-183217246259

Choose the right spray nozzle for an optimised spray process

Each type of nozzle has a specific flow rate, spray pattern and droplet size. To optimise the spray process, it is important to understand how different parameters affect the choice of spray nozzle and type of solution.

The Knowledge base contains information about spray pattern, droplet size, flow rate/pressure, spray coverage, materials, etc. The 'Materials' section of the Knowledge base lists the most commonly requested materials and maximum temperature of the material.

Our main supplier is BETE, a leading manufacturer of spray nozzles and spray systems with more than 70 years of experience in spray processes and a product range including over 20,000 components.

BETE's spray technology is used worldwide to optimise processes in many different industries, including the energy sector, chemical and petrochemical industry, food industry and offshore.

Some of BETE's certifications include ISO 9001:2015, ATEX and FM Approval.

BETE Performance Spray Engineering

BETE offers test facilities, CFD modelling, and advanced technical support. To ensure high quality and reliable deliveries, BETE's manufacturing is largely based 'in-house' with its own foundry, CNC machining, assembly and quality control.

BETE Certifications & Approvals

Click the button below for a full list of BETE's certifications. It is also possible to download some certificates.