Engineered Dry Chemical Fire Suppression
Precision-designed suppression for hazards that demand more than off-the-shelf solutions.
When a fire hazard is too large, too complex, or too critical for a standard pre-engineered system, the Janus Fire Systems® Engineered Dry Chemical Suppression System delivers. Built around UL-listed hydraulic modeling and custom-configured hardware, every system is designed to your exact hazard — not adapted from a catalog.
Why “Engineered” Matters
Most dry chemical systems on the market are pre-engineered: tested once, listed at fixed configurations, and applied wherever they fit. That works for simple, bounded hazards. It doesn’t work for large machinery spaces, complex geometry, or applications that require long pipe runs, high flow rates, or coverage of multiple zones from a single cylinder bank.
Janus engineered systems are different. Each installation is hydraulically modeled using the Janus Design Suite®, our UL-listed flow calculation software. The software simulates agent and pressurizing gas movement through your specific piping network — accounting for every fitting, elevation change, and nozzle — and confirms that the required quantity of agent reaches every nozzle within the required discharge time. No guesswork. No one-size-fits-all assumptions.
Pre-Engineered vs. Janus Engineered: A Direct Comparison
Pre-Engineered Systems
- Individual pipe run to each nozzle
- Piping must be balanced per NFPA 17
- Fittings limited per listing
- Nozzle count fixed at time of original listing
- Pipe sizes fixed per original listing
- Fixed-orifice nozzles only
Janus Engineered Systems
- Common manifold serves all nozzles simultaneously
- Balanced or unbalanced piping — both UL & NFPA compliant
- No predetermined fitting count or limit
- No fixed nozzle limit — only a successful calculation is required
- Pipe sizes driven by designer layout and flow calculations
- Variable-orifice JSH nozzle — custom drilled per flow calculation
Where It’s Used
Engineered dry chemical suppression is the right choice when hazard size, geometry, or criticality rules out pre-engineered options. Common applications include:
Marine Vessels
Engine rooms, generator spaces, and ship bridges require fast-acting suppression with long pipe runs and remote actuation capability for unmanned spaces.
Offshore Platforms
Flammable liquid and gas hazards on offshore platforms demand high flow rates and the ability to bank multiple cylinders for extended coverage.
Hazardous Storage Warehouses
Large-footprint storage areas with flammable liquids or chemicals often exceed pre-engineered nozzle coverage limits — engineered systems scale to fit.
Industrial Facilities
Manufacturing and processing environments with Class A, B, or C fire risks benefit from multi-zone suppression designed around process equipment layouts.
System Capabilities
The Janus Engineered Dry Chemical System is built for flexibility without sacrificing performance:
- UL Listed — engineered system, fully tested and validated
- 500 psi (34.47 bar) storage pressure for maximum pipe distances without a driver cylinder
- Five cylinder capacities; 45 lb to 855 lb fill options in 45 lb increments
- Banks of manifolded cylinders for large- capacity applications
- Remote Pneumatic Actuation — up to 16 cylinders in a single arrangement
- Custom-drilled JSH variable-orifice nozzles sized per flow calculation
- Seven nozzle sizes with expansive vertical and horizontal area coverage
- Screening nozzles for addressing uncloseable openings
- Janus Design Suite® flow calculation software — UL listed and validated
- Global distribution supported by experienced suppression specialists
The Extinguishing Agent
Janus Engineered systems use ABC Multi-Purpose dry chemical, a specially fluidized and siliconized mono-ammonium phosphate. It works across all three major fire classes:
Class A
Melts at approximately 350°F, coating and chemically insulating burning surfaces
Class B
smothers flammable liquid fires and interrupts the combustion chain reaction
Class C
Non-conductive — safe for use on energized electrical equipment
Agent is stored in cylinder assemblies superpressurized with dry nitrogen to 500 psi (34.48 bar) at 70°F (21°C), ensuring consistent discharge performance across the design life of the system.
Ready to Design Your System?
Every Janus Engineered Dry Chemical system starts with a conversation about your hazard. Our specialists work with you through layout, agent quantity, cylinder configuration, and piping design — backed by UL-listed calculation software at every step.