Description
The Maxitrol M611B-3/4 is a precision-engineered modulating gas valve designed specifically for direct fired, negative pressure burner applications. Featuring a 3/4″ NPT connection, this valve delivers reliable, stepless gas flow modulation to maintain consistent air-fuel ratios and stable combustion performance across a wide range of operating conditions.
Key Features
- 3/4″ NPT inlet and outlet connections for straightforward installation into standard gas piping systems
- Engineered for direct fired, negative pressure burner systems — ideal for make-up air units, rooftop heating equipment, and industrial process heaters
- Maximum inlet pressure of 1/2 PSI (14″ W.C.) to suit low-pressure gas supply configurations
- Both sides fitted for low fire adjustment, providing flexible setup and precise minimum fire rate tuning from either side of the valve
- Modulating operation enables smooth, proportional gas flow control for efficient combustion and tight temperature regulation
- Robust Maxitrol construction ensures long service life and dependable performance in demanding commercial and industrial environments
Application
The M611B-3/4 is well-suited for use in direct-fired make-up air handlers, industrial air heating systems, and other negative pressure burner assemblies where accurate modulating gas control is required. Its dual-sided low fire adjustment ports give technicians the flexibility to fine-tune minimum firing rates during commissioning without repositioning the valve.
Specifications
- Brand: Maxitrol
- SKU / Model: M611B-3/4
- Connection Size: 3/4″ NPT
- Valve Type: Modulating Gas Valve
- Burner Type Compatibility: Direct Fired (Negative Pressure)
- Maximum Inlet Pressure: 1/2 PSI
- Low Fire Adjustment: Both sides fitted
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