Model 122 Natural Gas Pressure Regulator
The Model 122 natural gas pressure regulator is a high-capacity industrial combustion regulator engineered for commercial and industrial gas applications requiring precise control, fast response, and reliable performance at moderate inlet pressures. Designed with streamlined internal flow paths and internal pressure sensing, the Model 122 delivers stable outlet pressure without requiring an external control line in most installations.
Ideal for burners, boilers, furnaces, air heaters, kilns, and gas engines, the Model 122 provides an excellent balance of capacity, accuracy, and economy. Its internal sensing design simplifies installation while maintaining tight shutoff and responsive operation—making it a trusted solution for high-efficiency combustion systems and demanding industrial environments.
Specifications
Available Models
- 122-8: 8" diaphragm
- 122-12: 12" diaphragm
Both versions are available with optional external control line connections and monitoring configurations.
Construction
- Body: Cast iron
- Diaphragm Case: Die-cast aluminum alloy
- Valve Seat: Molded Buna-N soft seat
- Orifice: Precision knife-edge (removable)
- Stem: Stainless steel
- Seals & Diaphragms: Buna-N with nylon fabric reinforcement
Pressure Ratings
- Maximum Inlet Pressure:
- Up to 15 psi (normal operation)
- Outlet Pressure Range: 1½" w.c. to 2 psi (spring dependent)
- Temperature Range: -20°F to +150°F
For complete capacity tables, spring selections, outlet pressure ranges, and dimensional data, refer to the product data sheet provided above.
Model 122 Features
High-Capacity Combustion Regulator Design
Streamlined internal passages deliver large flow capacity while maintaining accurate pressure control for commercial and industrial combustion systems.
Internal Pressure Sensing
Engineered internal control tube provides accurate outlet pressure regulation without the need for an external control line (external sensing optional).
Moderate High-Pressure Capability
Designed to operate with inlet pressures up to 15 psi, supporting a wide range of industrial and commercial gas systems.
Precision Valve & Orifice Assembly
Soft-seat valve combined with a precision-machined knife-edge orifice ensures tight shutoff and repeatable performance.
Fast Response with Stable Operation
Double-acting vent damper design supports rapid response while maintaining stability, even under snap-acting or fluctuating loads.
Durable Construction Materials
Cast iron body and high-strength die-cast aluminum diaphragm cases provide corrosion resistance and long service life.
Benefits
- Accurate Pressure Control Without External Sensing: Internal sensing simplifies installation while delivering reliable outlet pressure regulation.
- Optimized for High-Efficiency Equipment: Fast response characteristics improve ignition reliability and combustion stability in modern burners and boilers.
- Reduced Installation Complexity: Eliminates the need for control-line piping in many applications, reducing installation time and potential leak points.
- High Capacity in a Compact Regulator: Often allows the use of a smaller regulator compared to alternative designs while still meeting flow requirements.
- Proven Reliability in Industrial Environments: Rugged construction and serviceable design support long-term performance and reduced downtime.
Capability
The Model 122 regulator is designed to support a broad range of combustion-focused gas regulation applications.
- Application Types: Burners, boilers, furnaces, air heaters, kilns, and gas engines
- Gas Compatibility: Natural gas, propane, LPG, air, nitrogen, dry COâ‚‚, and other non-corrosive gases
- Installation: Above-ground or vault installation (indoor or outdoor installation)
- Pipe Sizes: 1", 1¼", 1½", 2", and 2½" NPT
- Control Method: Internal sensing standard; external control line optional
The Model 122 is also compatible with the QR-S Mechanical Damping Device, which enhances regulator response in high-efficiency equipment applications where rapid gas demand can impact ignition performance.
Talk to an Industrial Gas Control Expert
Whether you’re specifying industrial gas regulators, selecting industrial relief valves, or upgrading critical gas infrastructure, we can help you identify the right solution for your application.
