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.

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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 CO₂, and other non-corrosive gases

• Installation: Above-ground or vault installation (indoor use only)

• 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.

Specifications