Stationary Proportioners

Product information

FireDos

Purely Mechanical Foam Proportioning for Industrial Fire Protection

FireDos stationary proportioners are precision-engineered systems designed for accurate foam concentrate dosing in fixed industrial fire suppression installations. Driven exclusively by the extinguishing water flow, the system operates purely mechanically — without external power supply — ensuring maximum reliability in critical emergency scenarios.

Mechanical Operating Principle

FireDos proportioners consist of a water motor directly coupled to a positive displacement dosing pump.

• Water flow drives the motor • Pump speed increases proportionally to flow rate • Foam concentrate is injected at a constant ratio • Proportioning remains stable across wide flow and pressure variations

This direct mechanical correlation guarantees consistent foam quality even during fluctuating discharge conditions or pulsating flow.

Key Advantages

• Purely mechanical operation • No electrical dependency • Constant proportioning rate • Very low pressure loss • Wide operating range • Suitable for high-viscosity foam concentrates • Compatible with AFFF, AR-AFFF and fluorine-free foams (F3) • Operating pressure up to 16 bar (static versions up to 25 bar) • ATEX versions available

Wide Flow Capacity Range

FireDos stationary proportioners are available in multiple sizes covering flow rates from approximately 300 l/min up to 25,000 l/min and beyond. Various proportioning rate configurations are available, including fixed and stepless adjustable versions depending on system design requirements.

Suitable for:

• Pump room installations • Skid-mounted foam units • Tank farm deluge systems • Monitor-based protection systems • Large industrial process areas

Environmentally Safe System Testing

FireDos systems allow full functional testing without producing premix or foam discharge.

• Foam concentrate is recirculated to the tank • Flow rate is precisely measured • No premix enters drainage systems

This ensures environmentally responsible and cost-efficient verification of system performance.

Typical Applications

• Tank farms • Chemical and petrochemical plants • Energy facilities • Aircraft hangars • Waste processing plants • Industrial production sites

FireDos Stationary Proportioners provide reliable, precise and low-maintenance foam dosing for demanding industrial fire protection systems.