Product overview
CHEMGUARD COM-HD is a water-powered oscillating base that can be supplied alone or as a monitor assembly. A small diverted water flow drives the gearbox, allowing the monitor to sweep a preset arc without an electrical drive. The monitor and nozzle remain separate selection items unless included in the ordered assembly. Oscillation arc, speed, elevation and flow must be set for the actual protected area and hydraulic supply. Approval references are assembly-specific: the base alone does not establish approval for every externally supplied monitor, nozzle or foam concentrate.
Technical specifications
| Brand / product range | CHEMGUARD |
|---|---|
| Product / system | Water-Powered Oscillating Monitors |
| Product type | Foam Systems |
| Product family | Foam Discharge Equipment |
| Subcategory | Nozzles / Monitors / Eductors |
| Model | COM-HD |
| Drive | Water-powered double-reduction gearbox; no external electrical drive |
| Operating inlet pressure | 40–200 psi / approximately 2.8–14 bar |
| Maximum flow with BRAHMA monitor | 1250 gpm |
| Standard connections | 4 inch ANSI Class 150 inlet/outlet flanges on the base |
| Monitor arrangement | Designed for a suitable 3 inch-waterway manual monitor with the specified inlet |
| Oscillation arc set points | 25°, 40°, 60°, 80°, 100° and 120° |
| Maximum oscillation speed | Approximately 40 degrees/second; adjustable and fluid-dependent |
| Drive-water demand | Up to 13 gpm / 49 L/min at maximum recommended speed |
| Body and bearing materials | 304 stainless steel; bronze drive/control components as documented |
| Configuration choices | Base only; BRAHMA assembly with selected nozzle; or an explicitly selected external monitor/nozzle |
| UL scope | Referenced BRAHMA plus CMNB350/500/750 assemblies with specified connections; confirm concentrate-specific listed duty |
| FM scope | Water service with the specific FM-approved monitor/nozzle assembly |
Key features
- Model: COM-HD
- Drive: Water-powered double-reduction gearbox; no external electrical drive
- Operating inlet pressure: 40–200 psi / approximately 2.8–14 bar
Applications
Engineered foam or water monitor systems for relevant tank farms, refineries, hangars and heliports. Confirm the selected assembly listing, swept coverage, drainage, supply pressure and functional-test arrangement for the project.
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
View this product on the manufacturer website (opens in a new tab)