Product overview
CHEMGUARD CMNB constant-flow monitor nozzles combine straight-stream and fog patterns in a brass assembly. The referenced series contains separate nominal flow sizes; the constant-flow feature refers to changing the discharge pattern under the rated conditions, rather than flow being independent of inlet pressure. The correct nozzle must be matched to the monitor, connection, available hydraulic duty and selected foam solution. The manufacturer reach table is model- and pressure-specific, with maximum straight-stream reach measured at a stated elevation; it should not be treated as a guaranteed site coverage radius.
Technical specifications
| Brand / product range | CHEMGUARD |
|---|---|
| Product / system | Monitor Nozzles |
| Product type | Foam Systems |
| Product family | Foam Discharge Equipment |
| Subcategory | Nozzles / Monitors / Eductors |
| Documented family | CMNB constant-flow monitor nozzles |
| Models | CMNB-300, CMNB-350, CMNB-500, CMNB-700, CMNB-750 and CMNB-1000 |
| Nominal flow reference | Model-specific rating at 100 psi; confirm selected model duty |
| Inlet | 2½ inch FNST |
| Construction | Corrosion-resistant brass |
| Patterns | Straight stream, narrow fog and wide fog |
| Flow behaviour | Constant across pattern changes at the specified operating condition; pressure changes still affect duty |
| Stream conditioning | Built-in stream-shaper grid |
| Maintenance provision | Grease fittings |
| Protective bumper | Heavy-duty bumper on the 1000 gpm model |
| Reach scope | Use the exact model/pressure table; some source ranges are extrapolated observations |
| Documented fluid scope | Water or compatible AFFF solution; other concentrates require explicit assembly verification |
Key features
- Documented family: CMNB constant-flow monitor nozzles
- Models: CMNB-300, CMNB-350, CMNB-500, CMNB-700, CMNB-750 and CMNB-1000
- Nominal flow reference: Model-specific rating at 100 psi; confirm selected model duty
Applications
Industrial, marine and offshore monitor arrangements within the selected nozzle and system scope. Confirm hydraulic supply, reaction forces, monitor mounting and the compatible foam listing before selecting the assembly.
Selection and project integration
Provide UDCT with the fuel or test application, required capacity, available water pressure and flow, selected concentrate and compatible equipment. Confirm the exact part numbers, coupling threads, storage conditions and current manufacturer instructions. For foam systems, use the fuel-specific application criteria and approved proportioning/discharge assembly; commissioning must verify the actual hydraulic and proportioning performance.
Manufacturer documents
Official product reference
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