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.
