Advanced Inline Proportioning For Industrial Fire Protection

How It Works: Operating Principle

The proportioner operates on the Venturi principle:

Water Flow & Pressure Drop: As pressurized water flows through the proportioner's constricted section (the Venturi), its velocity increases, creating a localized area of low pressure.

Concentrate Induction: This pressure differential (suction) acts on the foam concentrate supply line connected to the proportioner's suction port. The higher atmospheric pressure in the concentrate container pushes the liquid into the low-pressure zone.

Precision Metering & Mixing: The concentrate flow is precisely controlled by a dedicated metering assembly. The inducted concentrate is immediately injected into the high-velocity water stream.

Hydraulic Mixing: The turbulent energy of the water thoroughly mixes the concentrate and water within the proportioner's body and downstream piping, producing a uniform foam solution ready for the discharge device (e.g., monitor, nozzle, sprinkler).

Key Applications

This proportioner is essential in fixed and semi-fixed fire protection systems across numerous high-hazard sectors:

Petrochemical & Oil & Gas: Protecting storage tanks, loading racks, refineries, and offshore platforms.

Aviation: For aircraft hangar suppression systems and crash rescue vehicles.

Marine & Port Facilities: Installed on docks, onboard ships, and within vessel engine room protection systems.

Warehousing & Logistics: Protecting facilities storing flammable liquids or high-piled combustible materials.

Power Generation: Safeguarding turbine halls, fuel storage areas, and transformer yards.

Industrial Manufacturing: Used in facilities involving paints, solvents, and chemical processing.

Annual Inspection & Testing: The proportioner must be flow-tested annually in accordance with NFPA 11 or relevant local standards to verify its accuracy at designated flow rates and pressures.

Concentrate Compatibility: Always ensure the proportioner's seals and internal materials are compatible with the specific type of foam concentrate used. Incompatibility can cause swelling, degradation, and failure.

Suction Line Integrity: Keep suction lines as short and straight as possible. Ensure all connections are airtight; even a small air leak can severely disrupt induction and stop foam production.

Correct Ratio Selection: Verify that the proportioner's fixed ratio (e.g., 1%, 3%, 6%) matches the manufacturer's recommendation for the foam concentrate and the specific fire hazard.

Flush After Use: After any testing or actual discharge, thoroughly flush the entire system with clean water to prevent crystallization or corrosion from residual foam concentrate.

Professional Service: Maintenance, ratio changes, or repairs should only be performed by qualified personnel familiar with the device.