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Itron B31 Series Commercial Regulator

Commercial Regulator
B31 Series

B31R–The B31R (pg. 4) is the internal relief valve (R) version of the B31 Series. The 1” internal relief valve provides exceptional relief capacity.

• Field Interchangeable orifice
• 27 sq. in. diaphragm area
• Spring-loaded internal relief valve
assembly
• Interchangeable adjustment spring
• Controlled breather orifice
• Wide range of NPT valve body sizes

• Field Interchangeable orifice
• 27 sq. in. diaphragm area
• Spring-loaded internal relief valveassembly
• Interchangeable adjustment spring
• Controlled breather orifice
• Wide range of NPT valve body sizes

Material Construction:
Valve Body: High tensile strength cast iron (ASTM A-126, Class A)
Orifice: Aluminum - standard Brass - optional (ASTM B16, Alloy 360)
Valve Seat: Buna-N or silicone (for temperatures below -20oF)
Valve Stem: Aluminum
Lever Pin: Stainless steel (Type 303)
Lever: Zinc and dichromate plated steel (AISI C1010)
Upper Diaphragm Plate: Zinc and dichromate plated steel (14 gauge steel)
Lower Diaphragm Plate: Die cast aluminum (ASTM B-85 Alloy SC84A)
Diaphragm: Buna-N and nylon reinforcing fabric
Vent Valve/Seat: Neoprene
Vent Screen: Stainless Steel (16 mesh)
Adjustment Ferrule: Delrin; Die cast aluminum for HP ver. (ASTM CS43A)
Seal Cap: Die cast aluminum (ASTM CS43A) or ABS plastic
Diaphragm Case: Die cast aluminum (ASTM B85 –Alloy SC84A)
Internal monitor orifice: Brass (ASTM B16 Alloy 360)
Shipping Weight:
8 Regulators per box:  Box weight: 52 lbs


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