foam proportioning system working principle

The fire truck PTO (Power Take-Off) is a power transmission device that transfers engine power to the fire pump. When the firefighter activates the PTO, mechanical power from the engine is transmitted through the transmission and PTO to the fire pump — this is the core working principle of how a fire fighting truck PTO system operates — enabling the pump to deliver high-pressure, high-...

A fire pump is the heart of every fire truck's water delivery system. Whether responding to a structural fire, industrial emergency, airport incident, or wildland operation, the fire pump on a fire truck is responsible for delivering high-pressure water to hoses, fire monitors, and foam systems. Its centrifugal impeller design and PTO-driven system ensure stable pressure and high flow rates, ...

The fire truck foam system mixes water with foam concentrate at precise ratios (1%, 3%, or 6%) to create a foam solution. This solution is then pressurized by the fire pump and expanded with air through foam nozzles — this is the core working principle of how a foam fire truck mixes foam and water — ultimately producing a stable foam blanket that covers the fuel surface. This process increases fir...

The fire truck water plumbing system is the core of every firefighting operation. It precisely directs water from the tank or an external source through the pump, valves, and piping to deliver high-pressure water or foam to the fire scene — whether it is a high-rise building fire in a dense city center or a petrochemical storage tank fire in an industrial zone. The fire truck water plumbing ...

In firefighting operations, the selection of discharge mode directly determines fire extinguishing efficiency, operational safety, and fire control effectiveness. Most people are unaware that fire truck nozzles can switch among three core discharge modes: straight stream, spray stream, and safeguarding stream. Different modes vary significantly in flow pattern, range, impact force, and coverage ar...

A rescue fire fighting truck is a specialized emergency vehicle designed to perform both fire suppression and rescue operations. Unlike standard fire trucks that focus primarily on extinguishing fires, rescue fire fighting trucks combine firefighting equipment with rescue tools, lifting and hoisting devices, cutting and spreading tools, winches, generators, and lighting systems.     This...

Foam fire trucks combine a dedicated foam concentrate tank with a separate water tank and a precision proportioning system. They use a proportioning system to introduce foam concentrate into the water stream at a specified concentration, commonly 1%, 3%, or 6%, depending on the foam concentrate and firefighting application. The dual-tank design allows firefighters to use water alone when...

The PH series around-the-pump foam proportioner is a professional foam concentrate suction and delivery device designed specifically for foam firefighting systems and fire trucks. It is installed within the supporting fire truck fire pump and water supply system and serves as the core device for achieving automatic proportional mixing of foam concentrate and clean water. Unlike traditional manual ...