Foam Water Spray System

AFFF Foam Fire Protection System

• Foam water spray systems can be used for a combination of Class A and Class B hazards.
• They are mostly applicable to the protection of two-dimensional flammable liquid hazards.

Method of operation for foam water spray systems
Foam water systems generally work by allowing foam concentrate to mix with water flowing into the piping system. These systems are equipped with a bladder tank containing foam. When a fire is detected a signal is sent to the releasing panel to open the deluge valve allowing water to flow. At the same time, piping to the bladder tank flows and pressurizes the outer shell of the bladder tank which forces foam concentrate to travel into the system piping and then into the Foam Proportioner. The foam solution produced by water and foam concentrate flows into the system piping and is discharged through the open nozzles or sprinklers

Foam water spray systems can be used for discharge of water first, followed by discharge of foam for a pre-determined period, and then followed by water until manual shut off.
Types of foam water spray systems Self-contained AFFF 500 and 300

Foam water systems are generally divided into the following four (4) categories:

• Wet pipe systems
• Dry pipe systems
• Deluge systems
• Preaction systems

Types of foam concentrate
Various types of foam concentrate exist, in accordance with the application considered.

Typical foam concentrate types are the following:

• Aqueous Film-Forming Foam Concentrate (AFFF).
• Film-Forming Fluoroprotein Foam Concentrate (FFFP).
• Alcohol-Resistant Foam Concentrate, used for fighting fires on materials usually destructive to regular AFFF or FFFP foams as well as fires involving hydrocarbons.
• Fluoroprotein Foam Concentrate.
• Synthetic Foam Concentrate.
• In general, different types and/or brands of foam concentrates shall not be mixed together.