Model 243 Natural Gas Pressure Regulator
The Model 243 natural gas pressure regulator is a large-capacity commercial and industrial service regulator designed for reliable pressure control across a wide range of distribution, metering, and appliance applications. Its rugged construction, interchangeable components, and broad configuration options make it a versatile solution for both commercial facilities and gas distribution systems.
Commonly used for pressure factor measurement, pressure-compensated metering, and fixed-factor billing, the Model 243 is well suited for factories, district regulator stations, commercial laundries, and institutional buildings. Its design also supports gas-fueled equipment such as boilers, burners, furnaces, ovens, heaters, kilns, and engines, delivering dependable performance in demanding environments.
Available Models
- 243-8: 8" diaphragm regulator
- 243-12: 12" diaphragm regulator
Both sizes are available with multiple configurations, including:
- Standard regulator
- Internal relief valve (IRV)
- Low-pressure cut-off (LPCO)
- Monitor
- Pilot-Operated 243-RPC
Construction
Body: Cast iron (ASTM A126 Class B)
Diaphragm Cases: Die-cast aluminum alloy
Diaphragm: Buna-N with nylon fabric reinforcement
Valve Seat: Molded Buna-N
Orifice: Brass or aluminum (size dependent)
Internal Components: Stainless steel and corrosion-resistant materials
Pressure Ratings
- Maximum Inlet Pressure:
- 125 psi
- Outlet Pressure Ranges:
- Inches water column to 10 psi (spring dependent)
- Operating Temperature Range:
- -20°F to +150°F
For detailed pressure ranges, spring selections, capacity tables, and dimensional data, refer to the product documents above.
Model 243 Features
Large-Capacity Commercial & Industrial Design
Supports high flow rates while maintaining stable outlet pressure for demanding service applications.
Interchangeable Body & Diaphragm Assemblies
Union connection allows fully interchangeable bodies and diaphragm cases, improving field versatility and simplifying maintenance.
Wide Gas Compatibility
Designed for natural gas service and compatible with propane vapor (LPG), air, nitrogen, dry CO₂, and other non-corrosive gases.
Multiple Safety & Control Options
Available with internal relief valve (IRV) and low-pressure cut-off (LPCO) configurations for added system protection.
High-Pressure Variants Available
Supports higher inlet pressures depending on model, pipe size, and orifice selection.
Pilot-Operated Option
Pilot-operated variants are available for applications requiring enhanced pressure accuracy and stability.
Benefits
- Flexible Application Coverage: Suitable for commercial buildings, industrial facilities, and distribution system installations.
- Supports Accurate Metering & Billing: Ideal for pressure factor measurement, pressure-compensated metering, and fixed-factor billing applications.
- Simplified Installation & Service: Union-style construction allows easy installation, adjustment, inspection, and servicing in any piping orientation.
- Enhanced System Safety: Optional internal relief valve and low-pressure cut-off protect downstream equipment and piping.
- Proven, Field-Tested Performance: Widely deployed in commercial and industrial gas systems with a long service history.
Capability
The Model 243 regulator family is engineered to support a broad range of commercial, industrial, and distribution system requirements.
- Application Types: Commercial buildings, industrial facilities, district regulator stations, pressure-compensated metering, gas-fueled equipment
- Gas Compatibility: Natural gas, propane vapor (LPG), air, nitrogen, dry CO₂, and other non-corrosive gases
- Installation: Indoor or outdoor (not recommended for buried service)
- Pipe Sizes:
- 1-1/4", 1-1/2", 2" NPT, 2" FLG
- Flanged options available on select models
- Control Options: Options for internally controlled regulator or externally controlled regulator with sense line.
- Pilot-operated configurations available for higher accuracy requirements
The Model 243 is compatible with the QR-S Mechanical Damping Device, which enhances regulator response in high-efficiency burner and boiler applications.
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.
