Model 121 Natural Gas Pressure Regulator

The Model 121 natural gas pressure regulator is a high-capacity, high-performance solution designed for demanding commercial and industrial gas applications. Engineered to handle higher inlet pressures and flow rates with exceptional accuracy, the Model 121 delivers fast response and stable pressure control for combustion systems where performance and reliability are critical.

Commonly used in burners, boilers, furnaces, air heaters, kilns, and gas engine applications, the Model 121 is ideal for installations requiring precise regulation at higher volumes. Its robust construction, advanced valve options, and multiple configuration choices allow it to outperform many competing high-pressure gas regulators—often enabling the use of a smaller regulator without sacrificing capacity or control.

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Model 121 Features

• High-Capacity Performance: Designed to support large gas volumes while maintaining accurate pressure control for commercial and industrial combustion systems.

• High Inlet Pressure Capability: Handles elevated inlet pressures, making it suitable for upstream regulation in demanding gas distribution and combustion applications.

• Precision Valve Design: Incorporates a soft-seat valve and a precision-machined knife-edge orifice to provide tight shutoff and repeatable control.

• Multiple Control Options: Available in standard, pilot-operated, pressure-loaded, and V-port valve configurations to meet a wide range of application requirements.

• Durable Construction: Features a cast iron body with die-cast diaphragm cases, providing strength, corrosion resistance, and long service life.

• Overpressure Protection Options: Compatible with monitoring configurations and additional system protection devices for enhanced operational safety.

Benefits

• Supports High-Volume Applications: Ideal for large commercial and industrial combustion systems requiring consistent pressure at higher flow rates.

• Improved System Performance: Fast response characteristics improve combustion stability, ignition reliability, and overall equipment efficiency.

• Design Flexibility: Multiple body sizes, valve options, and control configurations allow the regulator to be tailored to specific system demands.

• Reduced Equipment Size Requirements: High capacity often allows the use of a smaller regulator compared to alternative designs, helping reduce footprint and installation complexity.

• Long-Term Reliability: Rugged materials and proven design support dependable operation in continuous-duty industrial environments.

Capability

The Model 046 regulator family supports a wide range of operating conditions and configurations to meet diverse system requirements.

• Inlet Pressure: Up to 1,000 psi (model, spring, orifice, and trim dependent)

• Outlet Pressure Range: 3 to 200 psi (model dependent)

• Pipe Sizes: ¾", 1", and 1¼" NPT

• Installation: Indoor or outdoor (not suitable for buried service)

• Gas Compatibility: Natural gas, nitrogen, air, dry CO₂, and other non-corrosive gases

Monitor regulator variants (046-M and 046-2M) are available for applications requiring remote pressure sensing or use in monitor regulator sets for added system protection.

Specifications