Both the Model 121 and Model 122 are highly functional regulators that feature die-cast diaphragm cases and cast iron bodies. This makes them strong and corrosion resistant. Both models incorporate soft-seat valve material, plus a precision-machined “knife edge” orifice for a positive, tight shutoff.

This family of regulators includes models for:

• Standard regulators
• Zero governor or atmospheric regulators
• Differential regulators
• Back pressure regulators (or relief valves)
• Vacuum regulators
• Vacuum breakers

They can be used in a variety of commercial and industrial applications including burners, boilers, furnaces, air heaters and kilns. These regulators also work well for gas engines where fast response improves overall performance.
Benefits to you

• Allows above-ground or vault installation
• Provides for pilot-operated, pressure-loaded and V-port options
• Serves high-capacity installations
• Allows high inlet pressures