Let the responsible fire service define the response duty
The purchase brief should describe hazards, access, water supply and replenishment. The responsible fire service must select the required extinguishing system and applicable standards. This vehicle guide does not choose an agent or prescribe response tactics.
Specify the proposed proportioning architecture and compatible concentrate, then connect the pump duty to the agreed outlets. Water, concentrate, crew and equipment all belong in the completed load schedule. Tank volume alone cannot establish the required discharge.
Write acceptance conditions alongside the equipment schedule
Rosenbauer’s system descriptions illustrate different proportioning arrangements, not ratings for another manufacturer’s truck. Airport rescue procurement has a separate scope; a foam-equipped vehicle is not automatically suitable for ARFF duty.
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| Decision | What to establish | Condition or limit |
|---|---|---|
| Pump duty | Compare flow at the agreed pressure for each required outlet combination and supply condition. | A maximum-flow number and a separate maximum-pressure number do not prove simultaneous performance. |
| Proportioner and concentrate | Require written compatibility for the selected agent and the required flow and temperature range. | A selectable percentage alone does not establish mixing accuracy across the working range. |
| Proportioning architecture | Ask for an around-the-pump and a direct-injection proposal where both are offered, with their permitted inlet conditions, discharge combinations and concentrate supply arrangements. | Choose from the exact manufacturer operating envelope and service requirements; neither architecture is universally suitable for every duty. |
| Stored agents and payload | Review the completed mass schedule with crew, equipment, water and concentrate, including relevant partial-load cases. | More tank volume may reduce equipment allowance or exceed an axle limit. |
| Discharge arrangement | List monitor, hose outlets, fittings, controls and simultaneous-use assumptions in one system schedule. | An outlet shown in a photo may be optional; interfaces must match local equipment. |
| Acceptance scope | Agree measurable criteria, approved methods, witnesses and defect closure before production. | A water discharge video cannot demonstrate foam proportioning or a destination approval. |
Agree who approves the specification and witnesses acceptance
Request configuration-specific pump, proportioning, load and installation records. Define the demonstration conditions and closure of exceptions before release, with the responsible service owning the operational requirements.
Information to prepare for this review
- Response role, destination, approving authority and named specification owner
- Concentrate identity and supplier data, temperature range and water-source conditions
- Required discharge combinations and duty points stated as flow at pressure
- Crew seats, hose and equipment inventory, tank capacities and replenishment access
- Road and station clearances, steering, chassis requirements and axle limits
- Inspection witness, permitted test location, agent handling and waste-management responsibilities
Records to request and keep
- Approved chassis and body specification with pump, proportioner and monitor model identities
- System drawing identifying water and concentrate circuits, valves, controls and drain or flush provisions
- Concentrate compatibility statement and the equipment manufacturer's operating limits
- Project test report identifying vehicle, duty points, instruments, method, measured results and exceptions
- Completed-vehicle mass and axle records for the agreed acceptance loading condition
- Crew equipment inventory, operating manuals, maintenance schedule, spare-parts identification and training handover
- Signed release record closing discrepancies or explicitly recording accepted residual items
Common mistakes and what to check instead
- Ordering by water and foam tank sizes alone: Specify the complete discharge duty and confirm the pump, agent and proportioner as a system.
- Assuming every foam concentrate is interchangeable: Obtain compatibility evidence for the actual agent and equipment; do not infer it from a generic foam label.
- Treating an airport reference as an approval: Have the airport and competent authority define ARFF requirements and the exact evidence needed.
Scope of this guide
Agent selection, firefighting tactics and hazardous testing belong to qualified fire-service and technical personnel.
Third-party product literature is a source for procurement questions, not a declaration that KEEYAK supplies that component or meets its ratings.
Do not accept the system while compatibility, required duty points, legal loading or release exceptions remain unresolved.
Sources and applicability
Manufacturer examples of around-the-pump and direct-injection systems and flow, pressure and concentrate variables. These are not KEEYAK equipment specifications.
U.S. aircraft rescue and firefighting vehicle procurement guidance. Airport requirements must not be inferred from a general foam fire truck description.