The Maxitrol 325-9BL-1 1/2 is a certified line pressure gas regulator engineered for demanding commercial and industrial gas distribution applications. Featuring a robust lever-acting design, this regulator delivers precise, reliable pressure control with a positive dead-end lock-up to prevent pressure creep when gas flow stops — protecting downstream equipment and ensuring system integrity.
Equipped with Maxitrol’s proprietary Imblue Technology, the 325-9BL-1 1/2 offers enhanced corrosion resistance and long-term durability in harsh environments. Its large 1-1/2″ NPT connection accommodates high-capacity gas systems, making it an ideal choice for large commercial boilers, industrial burners, and high-demand heating equipment.
Key Specifications
- Connection Size: 1-1/2″ NPT
- Maximum Inlet Pressure: 2 PSI
- Outlet Pressure Range: 7–11″ W.C.
- Maximum Capacity: 2,250,000 BTU/hr
- Design: Lever Acting
- Lock-Up: Positive Dead-End Lock-Up
- Technology: Imblue Corrosion-Resistant Coating
- Certification: Certified Line Pressure Gas Regulator
Features & Benefits
- Lever-Acting Design: Provides smooth, accurate outlet pressure regulation across a wide range of flow conditions
- Positive Dead-End Lock-Up: Eliminates pressure rise at zero-flow conditions, protecting downstream appliances and controls
- Imblue Technology: Maxitrol’s advanced surface treatment delivers superior corrosion resistance and extended service life
- High Capacity: Rated for up to 2,250,000 BTU/hr — suitable for large commercial and light industrial gas systems
- Certified Performance: Factory-certified for reliable, code-compliant line pressure regulation
- 1-1/2″ NPT Connection: Standard pipe threading for straightforward installation into existing gas lines
Typical Applications
- Commercial boilers and water heaters
- Industrial process burners
- Large-capacity rooftop and make-up air units
- High-demand gas distribution systems



