Grieve Corporation 407M User Manual
Model “400” OVENPAK
®
Gas Burner Page 2105
Design and Application Details
OVENPAK® Burners are nozzle-mixing gas burners
for many industrial direct-fired applications where
clean combustion and high turndown are required.
They are simple and versatile for use on a variety of
heating applications.
The Model “400” OVENPAK® Burner (shown at
right) includes a combustion air blower with nonsparking paddle wheel-type impeller, pilot, spark
ignitor, stainless steel discharge sleeve, mixing cone,
self-contained internal air and gas proportioning
valves, and provision for your flame safeguard
sensor.
Right: Model 415 OVENPAK® Gas Burner with optional:
• combustion air filter
• connecting base and linkage assembly
• electrical control motor (by others)
Cross sectional view of a Model “400” OVENPAK® Gas
Burner
Principle of operation (illustrated at left)
The OVENPAK® Burner is designed for industrial
air heating applications. It is available in two basic
versions: 1) packaged with integral combustion air
blower, or 2) for use with an external blower. Both
versions include a gas and air valve, internally linked
together to control the gas-air ratio over the full
operating range. The gas flows through the nozzle,
then along the inside of the burner cone where
combustion air is progressively and tangentially mixed
with the gas. This produces a very wide turndown
range and a highly stable flame under a variety of
operating conditions.
10/92
Page 2106 Model “400” OVENPAK® Gas Burners
Design and Application Details
Model “EB” (external blower) OVENPAK® Burners
(shown at right), like all OVENPAK® Burner assemblies, are designed to deliver heat through a patented
mixing cone and stainless steel sleeve.
Flanged burner body design on all OVENPAK
Burner assemblies simplifies mounting and installation on your application. Burner can be installed in
any position that does not conflict with your control
motor or flame detector requirements.
Minimal torque requirements permit use of most
electric or air operators in conjunction with the optional (Maxon supplied) connecting base and linkage
assemblies.
Model “EB-MA” OVENPAK® Burner with discharge sleeve
and optional manual gas control
®
view into
cone of
EB version
Model EB-3 OVENPAK® Burner arranged for external
blower source with connecting base and linkage assembly
to adapt customer's automatic control motor
“400-MA” and “EB-MA” versions
Model “400-MA” versions include a combustion air
blower in your choice of the voltages shown on page
2107, but provide constant combustion air volumes.
They differ from “standard” versions by use of a
slotted adjustable air butterfly locking device as
shown in photo at left. Internally, the linkage normally
cross-connecting air and gas butterflies is omitted.
In normal operation, the air butterfly is set to the
desired air differential pressure, and the fuel only is
throttled by a separate control valve. Maximum
capacities match those cataloged for “standard”
burners of equivalent size. Minimum capacities with
full air flow will be higher than those of “standard”
burner.
“EB-MRV” versions (photo at right)
“EB-MRV” versions of OVENPAK® Burners permit
air/fuel ratio control via a Maxon MICRO-RATIO®
control valve throughout the firing range. They differ
from standard “EB” burners in that internal gas and air
butterflies and the related shafts and linkages are
omitted.
In normal operation, air and fuel will be proportioned by an external Maxon MICRO-RATIO® Control
valve.
Maximum capacities match those cataloged for
“EB” burners of equivalent size and differential air
pressure. Minimum capacity and air differential
pressure will vary with your application.
Model “EB-MRV” OVENPAK® Burner with optional 12"
discharge sleeve
®
Gas Burners
Page 2107Model “400” OVENPAK
Capacities and Specifications – 60 Hertz
Standard Model “400” OVENPAK® Burner in-
cludes a combustion air blower with motor.
Maximum capacity of Model “400” OVENPAK
®
Burner is affected by the static pressure within the
combustion chamber. Data shown assumes firing in
the open, or into an airstream with enough oxygen to
complete the combustion process. If burner is fired into
an oxygen-starved chamber or airstream, capacities
may be reduced as much as 25-30%. Do not attempt
to operate beyond the duct static pressure range
shown. For higher back pressure applications, select
from Model “EB” or “EB-MRV” OVENPAK® Burner
options.
All gas pressures are differential pressures and
are measured at the gas pressure test connection on
the backplate of each OVENPAK
®
Burner. Differential
pressures shown are approximate.
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Page 2108 Model “400” OVENPAK® Gas Burners
Capacities and Specifications – 60 Hertz
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Page 2109Model “400” OVENPAK® Gas Burners
Capacities and Specifications – 50 Hertz
Standard Model “400” OVENPAK
®
Burner includes a combustion air blower
with motor.
Maximum capacity of Model “400”
OVENPAK
®
Burner is affected by the static
pressure within the combustion chamber.
Data shown assumes firing in the open, or
into an airstream with enough oxygen to
complete the combustion process. If burner
is fired into an oxygen-starved chamber or
airstream, capacities may be reduced as
much as 25-30%. Do not attempt to operate
beyond the duct static pressure range
shown. For higher back pressure applications, select from Model “EB” or “EB-MRV”
OVENPAK
®
Burner options.
All gas pressures are differential
pressures and are measured at the gas
pressure test connection on the backplate
of each OVENPAK® Burner. Differential
pressures shown are approximate.
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Page 2110 Model “400” OVENPAK® Gas Burners
Capacities and Specifications – 50 Hertz
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®
Gas Burners
Capacities and Specifications
External Blower (EB) versions
Page 2111Model “400” OVENPAK
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