Mesh Foam Sprinkler

Model: ENF
Orientation: Pendant
K-factor: 2.9 (41), 4.5 (64), 4.8 (69)
Thread: 1/2”, 3/4”, 1” NPT / BSPT
Maximum Working Pressure: 175 psi (12 bar)
Minimum Operating Pressure: 45 psi (3 bar)
Material: Brass Frame; Stainless Steel Deflector and Mesh
Finish: Natural Finish, Chrome Plated (Frame)
View technical datasheet for more information

EMACO Mesh Foam Sprinkler is a type of air-aspirating foam equipment used in fixed foam-water fire protection systems. It is installed in a pendant position and discharges expanded foam from ceiling level over the protected area.

The sprinkler works with foam proportioning equipment that supplies a foam-water solution into it through a piping network. As the foam solution passes through the sprinkler, air gets mixed into the stream through air-induction openings. This causes the foam solution to expand before it is sprayed.

The expanded foam spreads across the area and forms a stable foam blanket. The foam blanket suppresses flammable vapors and prevents oxygen from coming in contact with the fuel. This helps control spill fires and limits fire from spreading.

Foam sprinklers of this type are generally installed in foam deluge or foam-water sprinkler systems. They are commonly installed in areas where Class B fires, such as flammable liquid and fuel fire is a risk.

These sprinklers are commonly used in facilities such as:

Aircraft hangars and aviation
Flammable liquid storage and processing facilities
Petrochemical plants and refineries
Fuel handling and storage area
Chemical and flammable liquid warehouse
Offshore and marine platforms

Since the foam is discharged from ceiling level, the sprinkler distributes foam evenly across the protected area. This allows the system to cover spill surfaces and exposed fuel areas effectively.

Design Specifications:

Pendant discharge configuration for ceiling installation
1/2″, 3/4″, and 1″ NPT / BSP threaded connection options
K-factor options 2.9 (41), 4.5 (64), and 4.8 (69)
Typical operating pressure range between 45 psi and 90 psi (3 bar to 6 bar)
Foam expansion ratio approximately 5:1
Deflector and mesh screen constructed from stainless steel
Frame constructed from brass with optional chrome finish
Designed for installation in foam-water fire protection systems

Q: What makes a foam sprinkler different from a standard water sprinkler?
A: Unlike conventional sprinklers that discharge only water, the Foam Sprinkler delivers a mixture of foam concentrate and water — producing a foam-water spray. This foam layer smothers flammable liquid fires by cutting off oxygen and suppressing vapours, while water provides cooling, making it far more effective against liquid fuel (Class B) fires.

Q: Where is a foam sprinkler typically used?
A: Foam sprinklers are primarily used in deluge foam systems in high-risk areas — such as loading/unloading zones, warehouses, aircraft hangars, chemical storage facilities, petrochemical plants, fuel-handling areas, marine facilities, or any location where flammable liquids or chemicals are present and rapid foam coverage is necessary.

Q: What pressure and water/foam mixture conditions are required for optimal performance?
A: The EMACO Foam Sprinkler is designed to operate at pressures up to about 175 psi (≈ 12 bar), with typical installation pressures higher than the minimum required. The foam-water mixture must be proportioned according to the foam concentrate and system design for effective foam generation and coverage.

Q: Can foam sprinklers be installed in different orientations?
A: Yes — the Foam Sprinkler supports pendent (ceiling-mounted) installation, and, depending on model/specification, other configurations may be possible, provided the deluge foam system design accommodates them.

Q: Why is low-expansion foam used instead of high-expansion or pure water?
A: Low-expansion foam provides a stable foam blanket over flammable liquids, smothering the fire and suppressing vapours effectively without excessive foam volume. Water alone may be insufficient to suppress vapour release or extinguish hydrocarbon fires; high-expansion foam is less effective for spray-based overhead systems. Foam sprinklers provide the ideal balance of smothering, cooling and coverage in deluge systems.

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