B42 Series Regulator

B42 Series Regulator

Max BTU Capacity: 3,800 scfh
Available in 1/2 in. through 1-1/4 in. connection
Compact size
Plated steel diaphragm plate
Stainless steel lever pin
One piece molded Buna-N valve seat
Interchangeable aluminum orifice
Spring loaded internal relief valve
12.6 sq. in. of diaphragm area


The B42 is a spring loaded self-operated regulator with internal relief option. The B42 features a molded diaphragm, 6:1 lever ratio and one inch vent. The benefit is a
lighter more compact unit that provides the power, capacity and relief performance of
larger regulators.

Additional information


Commercial, Residential

Regulator Type

Spring Loaded Regulator


NPT, Flanged

Connection (Inlet)

0.5 NPT, 0.75 NPT, 1 NPT, 1.25 NPT

Connection (size)

0.5" NPT, 0.75 NPT, 1 NPT, 1.25 NPT

Range in PSI

5" w.c. – 5 PSIG

SCFH or BTUs (in 1,000s)

2000-4000, 1500-2000, 750-1000, 500-750, 250-500, >250


N, R


New Mexico, Texas