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B34 Regulator
ITRON / ACTARIS / SCHLUMBERGER / SPRAGUE B34 GAS REGULATOR.
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Applications
Appropriate for many commercial and industrial uses such as gas engines, burners,
furnaces, and boilers. The rapid response of the B34 is particularly well-suited
for mid-range applications where quick on/off loads cause shock problems.
Option Designations
N - No Internal Relief
R - Internal Relief
DN - (See description below)
IMR - (See description below)
IMRV - (See description below)
HP - (See description below)
RAS - (See description below)
Descriptions
B34N – The B34N is a spring loaded self-operated regulator with no internal
relief, an adjustable loading ring for controlled boost at higher flows, and a precision
breather opening to ensure proper stability for all conditions. This model can be used on
low or intermediate inlet pressures where an internal relief or other type of over-pressure
protection device is not required
B34R – The B34R is the internal relief valve (R) version of the B31 Series.
This model features an adjustable loading ring for controlled boost at higher flows and a 1"
internal relief valve.
B34DN – The B34DN is a standard B34N with a closed-throat, downstream control
tap on the bottom of the diaphragm case, and no internal relief capabilities.
This unit is used when it is desirable to control the regulator from points other
than the valve outlet. Since the control point is no longer at the outlet of the valve
body, the regulator does not boost, but all the capacity tables are the same as
the R and N models.
B34DR – The B34DR is the same as the B34DN, except it has internal relief
similar to the B34R.
B34MN – The B34MN is very similar to the B34DN with a closed-throat,
downstream control line and no internal relief capabilities, except for an O-ring
seal on the valve body stem through the throat to assure positive downstream
control when installed ahead of a downstream regulator. Used in a series
monitoring installation as the upstream regulator, this unit gives customers an
operating device that assumes control over an operating regulator when failure
is sensed by the control line of the monitor. This series system assures
maximum safety with uninterrupted service. The monitor regulator is set to
take over control from the operating regulator with only a slight increase in
outlet pressure.
B34MR – The B34MR is the same as the B34MN, except it has internal relief
similar to the B34R.
Operating Temperature Range:
-20°F to 150°F
-29°C to 65°C
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Maximum Capacities on inches w.c. outlet:
2” outlet connection - 10000 scfh
1-1/2” outlet connection - 7500 scfh
1-1/4” outlet connection - 2500 scfh
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Features
Interchangeable brass orifice
78 in2 of diaphragm area
Spring-loaded internal relief valve assembly
Field interchangeable adjustment spring
Controlled size breather orifice eliminates pulsation and provides normal
action at low flows
Wide range of valve body sizes including NPT and flange connections
Benefits
Economical
Protects equipment from shock damage
Large 12" diaphragm for better outlet pressure control
Unmatched overpressure protection with internal monitor (IM) plus internal
relief option
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