Model 441-S Natural Gas Pressure Regulator
The Model 441-S natural gas pressure regulator is a large-capacity, low-pressure regulator engineered for applications requiring fast response, high sensitivity, and precise pressure control under heavy load conditions. Featuring large, flexible diaphragms and precisely calibrated springs, the 441-S delivers stable outlet pressure across a wide range of flow rates while maintaining excellent control accuracy.
Designed with rugged construction and proven mechanical reliability, the Model 441-S is well suited for distribution systems, industrial facilities, and monitoring applications where speed and accuracy are critical. Its dependable performance and ability to assume control instantly during abnormal conditions make it a trusted solution for both primary regulation and monitor service.
Product Documents
Specifications
Available Models
- Model 441-S
- Low-pressure, large-capacity regulator available in multiple body and diaphragm configurations
- Available diaphragm sizes: 10", 12", 14", 16", 18", 20"
Pipe Sizes
- 2"
- 3"
- 4"
Threaded and flanged body options are available depending on size and pressure requirements.
Construction
- Body Materials: Cast iron, ductile iron, or cast steel (model and flange rating dependent)
- Diaphragm: Buna-N, fabric-reinforced diaphragms available in multiple sizes for optimal performance
- Valve & Trim Materials:
- Brass or stainless steel stems and orifices
- Soft-seat valve options in Buna-N or polyurethane
- Spring Cage & Internal Components: Heavy-duty construction for stable operation and long service life
Pressure Ratings
- Outlet Pressure Range: Low-pressure service (inches water column up to several psi, spring and diaphragm dependent)
- Maximum Inlet Pressure: Varies by body type and flange rating
- Up to 125 psi on threaded bodies
- Up to 700+ psi on select flanged steel configurations
- Operating Temperature Range: -20°F to +150°F
For complete pressure limits, spring ranges, capacity tables, and dimensional data, refer to the product documents above.
Model 441-S Features
Large-Capacity Regulator Design
Oversized bodies, valves, and diaphragms support high gas demand while maintaining stable pressure control.
Fast Response & High Sensitivity
Quickly reacts to load changes, making it ideal for monitoring and emergency pressure control situations.
Balanced Valve Construction
Provides accurate pressure regulation and consistent lock-up performance across varying flow conditions.
Wide Diaphragm & Spring Selection
Multiple diaphragm sizes and spring ranges allow precise tuning for specific pressure requirements.
Monitor-Ready Without Modification
Can be used as a standby monitor regulator without mechanical changes, simplifying system design.
Benefits
- Exceptional Monitoring Performance: Assumes control immediately if an operating regulator fails or outlet pressure rises above its set point.
- Reliable Pressure Control Under Heavy Loads: Maintains precise outlet pressure even in large-capacity, high-demand applications.
- Enhanced System Safety: Fast response minimizes over-pressurization risk in critical gas systems.
- Field-Proven Durability: Rugged construction and proven design support long service life in utility and industrial environments.
- Flexible Application Use: Suitable for both primary regulation and monitor service in distribution and industrial systems.
Capability
The Model 441-S regulator supports demanding low-pressure gas regulation and monitoring applications.
- Application Types: Gas distribution systems, district regulator sets, industrial gas systems, monitoring installations
- Gas Compatibility: Natural gas, propane vapor (LPG), air, nitrogen, dry COâ‚‚, and other non-corrosive gases
- Installation: Indoor or outdoor (not recommended for buried service)
- Monitoring Use: Designed to operate as a monitor regulator upstream or downstream, quickly assuming control during abnormal conditions
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.
