Water Mist Systems/Water Mist Nozzles

Protection of electronic equipment, populated areas, and other water sensitive areas


Water mist protection systems are typically designed per NFPA 750 or similar design standards which provide minimum requirements for mist systems that extinguish, contain, or cool applicable fire or hazards by absorbing heat, displacing oxygen, and/or blocking radiant heat. BETE water mist nozzles are capable of effectively filling a contained area with the fine water droplets required by water mist systems for effective operation. The low volume flow and high evaporation rate of water mist sprays is easily vaporized by the heat of a fire, absorbing heat and displacing oxygen, which suppresses the fire while minimizing damage to water sensitive equipment or other assets that would otherwise be destroyed by water damage in high flow deluge systems. Professionals are increasingly turning to water mist systems in lieu previous system designs, such as Halon systems, due to environmental concerns and increasing regulations and the proven capabilities of water mist systems.

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

BETE Nozzles for Fire Protection (PDF - 25 KB)
 

Selecting a Water Mist System Nozzle:

Important factors to consider:

  • Size & shape of target area, equipment, or enclosure
  • Applicable design specifications and requirements
    • Required flow rates/coverage densities
  • Available nozzle mounting locations
  • 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 mist systems
    • However, as a nozzle manufacturer, BETE Fog Nozzle, Inc. cannot assume responsibility for the design of life/safety systems

Common Water Mist System Nozzle Uses and Industries:

  • Server rooms
  • Frying, baking, and food processing equipment
  • Gas turbines
  • Train cars & buses
  • Nuclear plants
  • Machine shops and manufacturing facilities
  • Offices, hotels, hospitals, and other highly populated areas

MicroWhirl

  • Commonly installed in a multiple nozzle manifold to maximize the coverage and simplify piping arrangements
  • Outstanding atomization
  • Optional safety wire hole available
Nozzle Type(s):
Whirl
  • Misting nozzles provide the low flow rates and fine atomization required for efficient water mist systems
Spray Pattern(s):
Mist
Flow Range:
.008 to .380 gpm
Typical Pressure Range:
100 to 3000 psi
Angle Range:
1 - 120°
Common Materials:
303, 316

Mist

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)
100 psi 250 psi 500 psi 1000 psi 2000 psi 3000 psi
MW 085 1/8″, 1/4″, 3/8-24 70° .008 .013 .019 .027 .038 .047
MW 105 1/8″, 1/4″, 3/8-24 70° .010 .017 .024 .033 .047 .058
MW 125 1/8″, 1/4″, 3/8-24 70° .012 .020 .028 .040 .056 .068
MW 145 1/8″, 1/4″, 3/8-24 70° .014 .023 .032 .046 .065 .079
MW 195 1/8″, 1/4″, 3/8-24 70° .020 .031 .044 .062 .087 .107
MW 275 1/8″, 1/4″, 3/8-24 70° .028 .044 .062 .087 .123 .151
MW 695 1/8″, 1/4″, 3/8-24 70° .069 .110 .155 .219 .310 .380

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.

PJ

  • Commonly installed in a multiple nozzle manifold to maximize the coverage and simplify piping arrangements
  • Impingement style nozzle with external pin
  • No whirl vanes or internal parts
  • Lower flow rates than P series
  • Multiple filter options available
  • Optional safety wire hole available
Nozzle Type(s):
Impingement
  • Misting nozzles provide the low flow rates and fine atomization required for efficient water mist systems
Spray Pattern(s):
Mist
Flow Range:
.007 to 2.43 gpm
Typical Pressure Range:
100 to 3000 psi
Angle Range:
90°
Common Materials:
Brass, 303, 316

Mist

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 40 psi 100 psi 1000 psi 2000 psi 3000 psi
PJ 6 1/8″, 1/4″ 90° - - .010 .030 .042 .052
PJ 8 1/8″, 1/4″ 90° - - .018 .057 .080 .099
PJ 10 1/8″, 1/4″ 90° - .017 .027 .085 .120 .147
PJ 12 1/8″, 1/4″ 90° - .023 .036 .115 .163 .199
PJ 15 1/8″, 1/4″ 90° - .037 .058 .185 .262 .320
PJ 20 1/8″, 1/4″ 90° .034 .067 .106 .335 .474 .581
PJ 24 1/8″, 1/4″ 90° .050 .100 .158 .500 .707 .865
PJ 28 1/8″, 1/4″ 90° .065 .130 .206 .651 .921 1.13
PJ 32 1/8″, 1/4″ 90° .090 .180 .285 .901 1.27 1.56
PJ 40 1/8″, 1/4″ 90° .140 .280 .443 1.40 1.98 2.43

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.

P

  • Commonly installed in a multiple nozzle manifold to maximize the coverage and simplify piping arrangements
  • Impingement style nozzle with external pin
  • No whirl vanes or internal parts
Nozzle Type(s):
Impingement
  • Misting nozzles provide the low flow rates and fine atomization required for efficient water mist systems
Spray Pattern(s):
Mist
Flow Range:
.034 to 6.52 gpm
Typical Pressure Range:
40 to 500 psi
Angle Range:
90°
Common Materials:
Brass, 303, 316

Mist

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 40 psi 100 psi 1000 psi 2000 psi 3000 psi
P 20 1/4″ 90° .034 .067 .106 .335 .474 .581
P 24 1/4″ 90° .050 .100 .158 .500 .707 .865
P 28 1/4″ 90° .065 .130 .206 .651 .921 1.13
P 32 1/4″ 90° .090 .180 .285 .901 1.27 1.56
P 40 1/4″ 90° .140 .280 .443 1.40 1.98 2.43
P 48 1/4″ 90° .200 .400 .633 2.00 2.83 3.47
P 54 1/4″ 90° .265 .530 .838 2.65 3.75 4.59
P 66 1/4″ 90° .376 .753 1.19 3.76 5.32 6.52

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.

L

  • Commonly installed in a multiple nozzle manifold to maximize the coverage and simplify piping arrangements
  • Misting nozzle with large free passage
Nozzle Type(s):
Spiral
  • Misting nozzles provide the low flow rates and fine atomization required for efficient water mist systems
Spray Pattern(s):
Mist
Flow Range:
.139 to 2.66 gpm
Typical Pressure Range:
40 to 500 psi
Angle Range:
90°
Common Materials:
Brass, 303, 316

Mist

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 50 psi 100 psi 250 psi 500 psi 1000 psi
L 40 1/8″, 1/4″ 90° .139 .311 .440 .696 .984 1.39
L 48 1/8″, 1/4″ 90° .199 .445 .630 .996 1.41 1.99
L 54 1/8″, 1/4″ 90° .266 .594 .840 1.33 1.88 2.66
L 66 1/8″, 1/4″ 90° .376 .841 1.19 1.88 2.66 3.76

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.

MPL

  • Commonly installed in a multiple nozzle manifold to maximize the coverage and simplify piping arrangements
  • BETE's unique, clog resistant S-vane design gives the MaxiPass L the largest free passage available for a given flow rate, making it resistant to clogging, efficient, and reliable
  • Easily handles liquids with high particulate concentrations
  • High reliability spray performance under the most difficult conditions
  • Lower flow rates than MaxiPass series
Nozzle Type(s):
Whirl
Spray Pattern(s):
Full Cone
Flow Range:
.086 to 1.54 gpm
Typical Pressure Range:
100 to 500 psi
Angle Range:
50 - 135°
Common Materials:
Brass, 303, 316

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 40 psi 50 psi 60 psi 80 psi
MPL 0.21 1/8″ 51°, 77°, 129° .116 .156 .210 .231 .250 .283
MPL 0.30 1/8″ 53°, 86°, 134° .164 .221 .298 .328 .355 .401
MPL 0.42 1/8″ 51°, 90°, 128° .231 .312 .420 .462 .500 .566
MPL 0.57 1/8″ 61°, 92°, 127° .315 .424 .572 .629 .680 .770
MPL 0.77 1/4″ 62°, 90°, 125° .425 .573 .772 .850 .919 1.04

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.