Design and Application Details - Westmill Industries Ovenpak 2150... · Model “400”...

Model “400” OVENPAK®-II Gas Burner Page 2153

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Design and Application Details

OVENPAK®-II Burners are nozzle-mixing gasburners for many industrial direct-fired applicationswhere clean combustion and high turndown arerequired. They are simple and versatile for use on avariety of heating applications.

The Model “400” OVENPAK®-II Burner (shown atright) includes a face-mounted motor, blower withnon-sparking paddle wheel-type impeller, pilot, sparkignitor, stainless steel discharge sleeve, mixing cone,self-contained internal air and gas proportioningvalves, and provision for your flame safeguardsensor.

The blower housing can be rotated and mounted inthree alternate locations in 90° increments around theburner air inlet center line. Control motor and low firestart switches may be mounted on either the right orleft hand side of burner body.

Principle of operation (illustrated below)The OVENPAK®-II Burner is designed for industrial

air heating applications. It is available in two basicversions: 1) packaged with integral combustion airblower, or 2) for use with an external blower. Bothversions include a gas and air valve, internally linkedtogether to control the gas-air ratio over the fulloperating range. The gas flows through the nozzle,then along the inside of the burner cone wherecombustion air is progressively and tangentially mixedwith the gas. This produces a very wide turndownrange and a highly stable flame under a variety ofoperating conditions.

Model 415 OVENPAK®-II Gas Burner with optionalcombustion air filter, high and low fire position switch set,spark ignitor, provision for customer’s UV scanner and withconnecting base and linkage for electrical control motor

Cross-sectional views of a Model “400” OVENPAK®-II Gas Burner

154 Model “400” OVENPAK®-II Gas Burners

Design and Application Details

Model “EB” (external blower) OVENPAK®-IIBurners (shown in photos), like all OVENPAK® Burnerassemblies, are designed to deliver heat through apatented mixing cone and stainless steel sleeve.

Flanged burner body design on all OVENPAK®

Burner assemblies simplifies mounting and installa-tion on your application. Burner can be installed inany position that does not conflict with your controlmotor or flame detector requirements.

Minimal torque requirements permit use of mostelectric or air operators in conjunction with theoptional (Maxon supplied) connecting base andlinkage assemblies.

View into metallic cone of Model EB-3 OVENPAK®-IIBurner, arranged for external blower source, withconnecting base and linkage assembly to adapt customer'sautomatic control motor, and optional low fire start switcharrangement. Inlet air piping uses flexible connector set.

Model EB-3 OVENPAK®-II Burner with large viewing port,spark ignitor, standard pilot gas adjustable orifice, optionallow fire start switch arrangement, and connecting base andlinkage for mounting customer’s control motor

Standard Model “400” OVENPAK®-II Burnerincludes a combustion air blower with face-mountedmotor.

Maximum capacity of Model “400” OVENPAK®-IIBurner is affected by the static pressure within thecombustion chamber. Data shown assumes firing inthe open, or into an airstream with enough oxygen tocomplete the combustion process. If burner is firedinto an oxygen-starved chamber or airstream, capaci-ties may be reduced as much as 25-30%. Do notattempt to operate beyond the duct static pressurerange shown. For higher back pressure applications,select from Model “EB” OVENPAK®-II Burner options.

All gas pressures are differential pressures andare measured at the gas pressure test connection onthe backplate of each OVENPAK®-II Burner. Differen-tial pressures shown are approximate.

Page 2155Model “400” OVENPAK®-II Gas Burners

Capacities and Specifications

3/96

For operation on 50 Hz, reduce OVENPAK®-IIBurner capacities by 83% and pressures to 70% ofthose shown.

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5715"4.3

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0052"2.2

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5241"3.1

5732"0.2

5233"6.1

0824"3.2

0435"3.2

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0522"8.1

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Model “400” OVENPAK®-II Gas Burners

Capacities and SpecificationsExternal Blower (EB) versions

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9/95

Capacities and SpecificationsExternal Blower (EB) versions



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Accessory Options

Air filter assemblies and silencers

Air filter assemblies help to trap airborne particu-late matter. They are offered with washable replace-able filter elements or with permanent metallic ele-ments. Filters mount onto OVENPAK®-II Burner'sblower housing and surround the combustion air inlet.

Filter silencers help reduce noise levels. Theyphysically become a part of the OVENPAK®-IIBurner's filter housing and enclose the combustion airinlet (as shown in photograph at right). They must befurnished in conjunction with a filter element assemblydescribed above.

Sound levels from actualtests conducted at full-rated60 Hz capacity are shown intable at right. Measurementsare the average maximum athigh fire for standard burner(natural gas, 8" dischargesleeve).

When accessories and/or options are added, usethe following guidelines to calculate sound levels.

Filter (permanent) add 2 dB (3dB)

Silencer (with permanent filter) subtract 2 db (1 dB)

12" discharge sleeve add 2 dB

50 Hz motor – 83% capacity subtract 2 dB

Propane gas add 4 dB

Combine the adds and subtracts for net changewhen calculating sound levels with more than one ofthese options/accessories. (Example: A burner withsilencer and operating on propane would be 2 dBlouder.)

Silencer includes filter element as standard.NOTE: Background may affect on-site

measurements.

Model 415 OVENPAK®-II Burner assembly with combustionair filter assembly (including replaceable foam filterelement). Permanent metallic filter element may besubstituted for standard foam filter element at extra cost.

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3/95

Accessory Options

Auxiliary SwitchesLow Fire (or Set Position) Switch Assembly

includes one cam-actuated switch (2 SPST circuits)which can be set to open a circuit when burner leavesminimum (or set) position. It meets NEMA #4/IP665standards for weatherproof, outdoors, non-hazardouslocations.

High and Low Fire Position Switch Assemblyincludes 2 cam-actuated switches (each with 2 SPSTcircuits). One switch may be field-set to activate athigh fire position, while the other is set to activate atlow fire position.

Discharge Sleeves are available in 3 versions:

– Standard sleeve is 8" long, made of #310 SS, andis suitable for downstream temperatures up to1000°F (538°C).

– For higher velocities, specify 12" long sleevemade of #310 SS for downstream temperatures upto 1000°F (538°C).

– For higher downstream temperatures between1000°F (538°C) and 1500°F (816°C), specify 8"long, #RA 330 SS sleeve.

Oven Wall Adapter Plate provides a meansof mounting an OVENPAK®-II Burner in place of anolder style Model “400” OVENPAK® Burner.

Optional high and low fire position switch set shown onOVENPAK®-II Burner assembly

Air Butterfly Position Switch Set provides oneswitch (2 SPST circuits) to monitor physical move-ment and/or position of OVENPAK®-II Burner’s airbutterfly control valve.

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D 82.7 43.9 52.11 52.31

E 57.8 05.01 13.21 57.41


OVENPAK®-II Burner Configurations

Maxon OVENPAK®-II Burner provides additional application flexibility with multiplecomponent arrangements. The standard configuration illustrated in the center of thispage may easily be switched to any of these other configurations to accomodate field-site space requirements.

Standard Configuration(as shipped from factory)

Figure 1Blower scroll case toLEFT with control motoron RIGHT

Figure 2Combustion air filterhousing to LEFT withcontrol motor on RIGHT

Figure 3Blower scroll case toRIGHT with controlmotor on RIGHT

Figure 4Combustion air filterhousing to RIGHT withcontrol motor on LEFT

NOTE: Optional switch sets are always onopposite side from mounted control motor


7/95

Dimensions ( in Inches)

Model “400” OVENPAK®-II Burners

Pipe threads on this page conform to NPT (ANSI Standard B2.1)

NOTE: All OVENPAK®-II Burners use ISO standard (metric) fasteners

ledoM A B C D E F G H J K L M N P

504

52.51 88.7 52.7 26.81 57.91 57.11 91.111

0.852.6 0.01 83.9

00.483.01

804

514 4/1-1 13.8 0.21 13.9 13.01

52452.61 18.7 88.7 3.32 4.72 52.71 44.11

2/1-158.7 52.01 13.31 49.01 60.6 49.11

534

2544

60.51 96.6 18.6

7.62 0.03

83.71

44.41

26.7 52.21 52.61 65.51 44.6 65.61654 83.51

0749.82 2.13

44.613

784 13.71

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18.857.8

18.613.5 21.3

52.7 88.5 60.31 0.41 5.8 18.2 26.1 13.3804

514 5.7 5.01 52.5 88.3

52418.8 18.7 13.21 91.7 13.5 13.4 88.7 13.8 26.71 2.32 13.11 60.6

57.

13.4534

544

65.01 96.9 57.41

83.6

88.8 96.3 18.6 88.9 6.32 1.52

44.31 5.5

96.4654

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784


Dimensions (in Inches)

Model “EB” OVENPAK®-II Burner

NOTE: All OVENPAK®-II Burners use ISO standard (metric) fasteners

Pipe threads on this page conform to NPT (ANSI Standard B2.1)

ledoM A B C E H J K L M N P R S

1-BE

52.51 88.7 52.7 5.111

0.852.6 0.01 83.9

60.483.01 52.8

18.82-BE

3-BE 4/1-1 13.8 0.21 13.9 13.01 5.7

4-BE52.61 18.7 88.7 5.51

2/1-158.7 52.01 13.31 49.01 60.6 49.11 18.8 18.7

5-BE2

6-BE60.51 96.6 18.6 65.61 26.7 52.21 52.61 65.51 44.6 65.61 65.01 96.9

7-BE 3

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1-BE57.8

18.613.5 21.3

52.7 88.5 60.31 26.1 13.3 96.6 mm7 52.6 5.42-BE

3-BE 5.01 52.5 88.3

4-BE13.21 91.7 13.5 13.4 88.7 13.8 26.71

57.

13.4 05.8

mm21

52.8 26.65-BE

6-BE57.41

83.688.8 96.3 18.6 88.9 6.32 96.4 05.9 52.01 26.8

7-BE 49.6


Component Identification

5/96

Suggested spare parts– Spark Ignitor – Discharge Sleeve– Flame Rod, if used – Oven Wall Gasket– Motor – Filter Elements, if used– Impeller – Mixing Cone– Gas/Air Valve Linkage KitTo order parts for an existing OVENPAK®-II Burner assembly, list:1. Name(s) of part(s) from above illustration2. Quantity of each required3. OVENPAK®-II Burner nameplate information:

• size of burner• assembly number and date• Factory Order number

Nameplate


Suggested Maintenance/Inspection Procedures

Discharge sleeve and cone alignmentThe mixing cone is self-centering within the burner

housing and discharge sleeve to provide a smallannular opening for the flow of some coolingcombustion air along the discharge sleeve wall. WeSUGGEST periodic inspection from the dischargeside of the burner to assure that this clearance ismaintained.

Blockage of the annular opening will lessenburner service life.

Filters should be inspected regularly andcleaned, using a vacuum to remove loose/dryaccumulations, then washing and/or degreasing asappropriate for the filter type used.

To replace flame rod or spark ignitor:1. Check Table 1 at right for dimension Y and cut tip

to length shown.2. Insert 1/2" NPT collar into burner and snug into

position.3. Insert insulator through collar into burner.4. Check table for dimension X, position accordingly,

and tighten locking bushing until insulator is heldfirmly.

WARNING: Over-tightening locking bushingmay damage ceramic insulator.

Table 1: Flame rod and spark ignitor dimensionsfor all Model “400” OVENPAK®-II Burners

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5042

4.0

5.5 9. 6 2.3804

3-BE 514 2.1

4-BE5-BE

5248.1 5.6 9. 8.01 2.3

534

6-BE7-BE

544

4.2 52.8 0.1 57.11 ---654

074

784

Design and Application Details - Westmill Industries Ovenpak 2150... · Model “400”...

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