B31 Series Gas Pressure Regulator
The B31 Series gas pressure regulator, now manufactured by ROOTS Regulators (formerly part of Itron’s gas regulator portfolio), sets the standard for reliable pressure control in commercial and industrial applications. Specifically engineered for applications requiring inches of water column or pounds delivery, the B31 serves utility services, furnaces, and boilers with exceptional precision.
The B31’s rapid response technology makes it particularly effective in systems where sudden on/off loads could trigger shock problems. Its swift adjustment capabilities prevent pressure spikes, ensuring stable downstream pressure even under varying load conditions.
Contact Linc Energy Systems for expert guidance on selecting the proper B31 configuration for your application.
B31 Features and Benefits
Core Features
- Field-interchangeable orifice for easy maintenance
- 27 in² diaphragm area for precise control
- Spring-loaded internal relief valve assembly
- Interchangeable adjustment spring
- Controlled breather orifice size
- Wide range of NPT valve body sizes, including mixed inlet/outlet configurations
Key Benefits
- Smooth control across varying inlet pressures
- Durable construction for long-term reliability
- Quick response protecting equipment from shock damage
- Superior overpressure protection with Internal Monitor plus Internal Relief (IMR) option
- User-friendly outlet pressure adjustment
- Meets DOT, ANSI, CSA, and AGA-GAMA Safety Standards
The ROOTS (Itron) B31R is the internal relief valve version of the B31 Regulator Series.
ROOTs B31 Technical Details
- Operating Temperature Range: -20°F to 150°F
- Available with silicone valve seats for applications below -20°F
- Multiple vent size options: 1/4", 3/8", 3/4", and 1"
- Capacity ranges up to 6,700 SCFH (based on 0.6 specific gravity gas)
- Maximum inlet pressure up to 125 PSIG
- Construction materials include:
- High tensile strength cast iron valve body
- Aluminum/brass orifice options
- Buna-N or silicone valve seats
Downloads
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- B31 Series Technical Specifications, including installation and maintenance guides. (PDF)
- ROOTS Regulator Catalog
Custom Options
- Multiple spring ranges
- Various orifice sizes
- NPT connection options
- Vent configurations
- Special materials for extreme conditions
Itron B31 Applications
The B31 Series serves diverse applications across commercial and industrial settings:
Primary Uses
- Utility service regulation
- Small to medium-sized furnaces
- Industrial boilers
- Commercial heating systems
- Process control applications
Industries
- Commercial buildings
- Light industrial facilities
- Utility services
- Manufacturing plants
- Institutional facilities
