Key Takeaways

Firemiks now offers an expanded series of FM-approved water-driven, volumetric foam proportioners, designated as Variable Viscosity Pump Proportioners per FM 5130 (May 2021). The solution is suitable for the new, higher-viscosity SFFF concentrates, and can be supplied for use with seawater.

⚠️ Important for Existing Systems

  • If you've switched from AFFF to fluorine-free concentrates, the dosing solution should be evaluated.
  • Higher or more variable viscosity can affect dosing accuracy and operation.
  • We assist with assessment and recommendations before upgrading or replacing equipment.

New FM-Approved Models

At Intersec 2026, Firemiks showcased new FM-approved models and flow sizes. The series has been expanded with 450, 800, 6000, and 8000 lpm.

Model Range and Capacity

The FM-approved portfolio now covers 7 flow sizes and a total of 18 FM-approved models:

FM-approved flow sizes (LPM):

  • 450
  • 800
  • 1800
  • 2400
  • 4000
  • 6000
  • 8000

Dosing rate: All models are supplied with standard 3%.

Material Selection

Proper material selection is essentially about water source and corrosion exposure. Firemiks offers two options for the water motor:

ALU (Freshwater)

Hard-anodized, PTFE-coated aluminum. Typically used where the system runs on freshwater.

BRZ (Marine/Offshore)

Nickel-aluminum bronze. Recommended for marine/offshore environments and seawater operation.

Option: Sizes 800 and 1800 can be supplied with SS 316L pump head if required.

Variable Viscosity in Practice

The transition to fluorine-free concentrates often means flow properties vary more than before. This is why FM 5130 is important: the approval covers documented performance with defined viscosity profiles (shear-rate).

For those of you responsible for operations or technical matters, this means one thing: stable dosing even when the concentrate behaves differently than traditional AFFF products.

Testing Without Discharge

In many systems, testing and documentation is as challenging as the installation itself. With the optional DRV (Dosing/Return Valve), concentrate can be returned to tank during testing, allowing you to verify dosing rate in a more controlled manner – without releasing foam to the environment.

Practical Benefits of Return Testing

  • Less handling of foam waste after testing
  • Better control of measurements and documentation
  • Lower costs for regular testing

Scaling with Parallel Units

For larger requirements, the solution can be scaled by running units in parallel – typically 12,000 lpm (2 × 6000) or 16,000 lpm (2 × 8000), depending on system design and application.

How Moray Can Assist

We supply these units as part of complete foam solutions – from assessment of existing systems to installation, service, and documentation. Many will recognize that "it works" until you change concentrate or water source and get deviations in testing. Being proactive is smart.

  • System assessment of existing dosing and water source (freshwater/seawater)
  • Correct model selection based on flow, application, and requirements
  • Supply of fluorine-free foam concentrates matched to the application
  • Installation, commissioning, and service
  • Documentation for internal control, survey, and insurance

Need a Technical Assessment?

We'll do a brief review of your system, concentrate, and requirements – and recommend next steps.

Sources and References