Water Wall Nozzles

Protect personnel, evacuation routes & muster areas, equipment, and structures from radiant heat


A water wall is a spray of water that acts as a barrier to shield personnel and equipment against radiant heat, harmful gases, and flames. The more water that is sprayed to form the suppression wall, the better the fire protection and shielding. High pressure and flow rates project water faster and further to form a larger buffer between the heat source and the protected areas.

Download the BETE Fire Protection Brochure (PDF - 1.4MB)

BETE Nozzles for Fire Protection (PDF - 25 KB)

Flat fan style nozzles are common and can produce an adequate barrier for some applications. However, full cone nozzles, particularly wide coverage spiral nozzles, are usually superior as they form a cone of liquid rather than a very thin plane of liquid. The spray pattern of BETE’s spiral full cone nozzles consist of multiple concentric cones for layered zones of security, providing a mix of coarser droplets, ideal for wind drift resistance and surface wetting, encapsulating and projecting smaller droplets, ideal for cooling and absorbing heat.

Selecting a Water Wall Nozzle:

Important factors to consider:

  • Target area to be protected
  • Available nozzle mounting locations
  • Available flow rate
  • Available pressure drop (∆P) across the nozzle
    • ∆P = supply pressure at nozzle inlet - process pressure outside nozzle
  • Our experienced engineers can help determine which nozzle will perform as required with your design details
    • BETE is pleased to offer assistance in selecting nozzles and materials to meet the detailed specifications, required nozzle performance (K-factor (flow vs pressure), pattern/coverage, droplet size, etc.) and documentation requirements associated with approved water spray systems
    • However, as a nozzle manufacturer, BETE Fog Nozzle Inc. cannot assume responsibility for the design of life/safety systems

Common Water Wall Nozzle Uses and Industries:

  • Heat protection from flare booms
  • Escape pathways for personnel during fire
  • Protection for fire fighters and emergency responders
  • Curtain off wellheads, storage tanks
  • Protect machinery, tools, and the water supply pumps used for fire suppression systems
  • Home and structure protection from forest fires

N

  • FM Approved, UL Listed, Lloyd's Register
  • U.S. Coast Guard Approval for N3-N5 ratings (90° and 120°)
  • Clog resistant, one piece design
  • Suitable for use in NFPA 15 compliant systems
  • Designed for industrial environments
  • Available with blow-off covers to prevent build-up and clogging in open orifices and piping while not in use
Nozzle Type(s):
Spiral
  • BETE’s spiral full cone nozzles consist of multiple concentric cones for layered zones of security, providing a mix of coarser droplets, ideal for wind drift resistance and surface wetting, encapsulating and projecting smaller droplets, ideal for cooling and absorbing heat.
Spray Pattern(s):
Full Cone
Flow Range:
12.0 to 597 gpm
Typical Pressure Range:
50 to 150 psi
Angle Range:
90 - 120°
Common Materials:
Brass, Nickel Aluminum Bronze, 316, Titanium
  • Nickel Aluminum Bronze recommended for sea-water applications

Full Cone

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
10 psi 20 psi 50 psi 75 psi 100 psi 150 psi
N 4 1/2″ 90°, 120° 12.0 17.0 26.9 33.0 38.1 46.7
N 5 1/2″ 90°, 120° 16.5 23.3 36.9 45.2 52.2 63.9
N 6 1/2″, 1″ 90°, 120° 21.0 29.7 47.0 57.5 66.4 81.3
N 7 1″ 90°, 120° 33.5 47.4 75.0 91.8 106 130
N 8 1 1/2″ 90°, 120° 47.4 67.1 106 130 150 184
N 9 1 1/2″ 90°, 120° 64.5 91.2 144 177 204 250
N 10 1 1/2″ 90°, 120° 84.4 119 189 231 267 327

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.

TF

  • Thirty percent finer atomization than an equivalent whirl nozzle
Nozzle Type(s):
Spiral
  • BETE’s spiral full cone nozzles consist of multiple concentric cones for layered zones of security, providing a mix of coarser droplets, ideal for wind drift resistance and surface wetting, encapsulating and projecting smaller droplets, ideal for cooling and absorbing heat.
Spray Pattern(s):
Full Cone
Flow Range:
8.52 to 680 gpm
Typical Pressure Range:
50 to 150 psi
Angle Range:
150 - 170°
Common Materials:
Brass, Nickel Aluminum Bronze, 316
  • Nickel Aluminum Bronze recommended for sea-water applications

Full Cone

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
5 psi 20 psi 40 psi 60 psi 100 psi 400 psi
TF 24 1/2″ 150°, 170° 8.52 17.0 24.1 29.5 38.1 76.2
TF 28 1/2″ 150°, 170° 11.7 23.3 33.0 40.4 52.2 104
TF 32 3/4″ 150°, 170° 14.8 29.7 42.0 51.4 66.4 133
TF 40 1″ 150°, 170° 23.7 47.4 67.0 82.1 106 212
TF 48 1″ 150°, 170° 33.5 67.1 94.9 116 150 300
TF 56 1 1/2″ 150°, 170° 45.6 91.2 129 158 204 408
TF 64 1 1/2″ 150°, 170° 59.7 119 169 207 267 534
TF 72 1 1/2″ 150°, 170° 68.0 136 192 235 304 608

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.

FF

  • Durable one-piece construction
  • Clog resistant
  • Extra wide flat fan spray angle
Nozzle Type(s):
Fan
  • Wide-angle, deflected flat fan pattern provides maximum coverage from each individual nozzle
Spray Pattern(s):
Fan
Flow Range:
5.47 to 371 gpm
Typical Pressure Range:
30 to 100 psi
Angle Range:
145°
Common Materials:
Brass, 316

Fan

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
3 psi 5 psi 20 psi 40 psi 100 psi 200 psi
FF 332 3/4″ 145° 5.47 7.07 14.1 20.0 31.6 44.7
FF 348 3/4″ 145° 6.03 7.78 15.6 22.0 34.8 49.2
FF 375 1/2″, 3/4″ 145° 6.56 8.47 16.9 24.0 37.9 53.6
FF 406 3/4″ 145° 7.67 9.91 19.8 28.0 44.3 62.6
FF 437 3/4″ 145° 8.76 11.3 22.6 32.0 50.6 71.6
FF 453 3/4″ 145° 9.86 12.7 25.4 36.0 56.9 80.5
FF 484 3/4″ 145° 11.5 14.8 29.7 42.0 66.4 93.9
FF 500 3/4″ 145° 13.1 17.0 33.9 48.0 75.9 107
FF 578 1″ 145° 16.4 21.2 42.4 60.0 94.9 134
FF 625 1″ 145° 19.9 25.7 51.4 72.7 115 163
FF 703 1″ 145° 24.6 31.8 63.5 89.8 142 201
FF 750 1″ 145° 28.8 37.1 74.2 105 166 235

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.

NF

  • Durable one-piece construction
  • High impact
  • Axial spray design with no internal components provides flexible and clog resistant design for almost any application
Nozzle Type(s):
Fan
  • Axial flat fan patterns can provide significant vertical throw distances
Spray Pattern(s):
Fan
Flow Range:
7.07 to 530 gpm
Typical Pressure Range:
30 to 100 psi
Angle Range:
60 - 120°
Common Materials:
Brass, 316

Fan

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
5 psi 20 psi 40 psi 100 psi 200 psi 400 psi
NF 200 1/2″ 65°, 80°, 90°, 110°, 120° 7.07 14.1 20.0 31.6 44.7 63.2
NF 300 3/4″ 65°, 80°, 90°, 110°, 120° 10.6 21.2 30.0 47.4 67.0 94.8
NF 400 3/4″, 1″ 65°, 80°, 90°, 110°, 120° 14.1 28.3 40.0 63.2 89.4 126
NF 750 1″ 65°, 80°, 90°, 110°, 120° 26.6 53.2 75.3 119 168 238
NF 800 1 1/4″ 65°, 80°, 90°, 110°, 120° 28.2 56.3 79.7 126 178 252
NF 1150 1 1/4″ 65°, 80°, 90°, 110°, 120° 40.7 81.4 115 182 257 364
NF 1500 1 1/2″ 65°, 80°, 90°, 110°, 120° 53.0 106 150 237 335 474

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.