TUBULAR HEATERS
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The
most versatile of all electric heating elements, the tubular heater
is capable of being formed into virtually any configuration. The basic
design consists of a helical coil of nickel-chromium resistance wire
precisely centered in a metal sheath. This coil is surrounded by magnesium
oxide powder which is vibration loaded to insure even density throughout
the length of the heater. This entire assembly is then reduced to
the finished diameter, compacting the MgO and "freezing"
the coil in the center of the heater. The range of ratings, sizes,
materials and terminations available makes the tubular heater adaptable
to many industrial, commercial and scientific applications. |
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Sheath
Materials:
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Copper Sheath:
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Water heating, water solutions non-corrosive
to copper. |
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Steel Sheath:
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Immersion in oils, molten salt baths,
alkaline cleaning solutions, tars and asphalt. Also suitable for clamping
to metal surfaces and casting into aluminum. |
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Stainless Steel
Sheath:
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Corrosive liquids, food processing
equipment. |
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Incoloy Sheath:
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Air heating, radiant heating, cleaning
and degreasing solutions, plating and pickling solutions, corrosive
liquids. |
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Other sheath materials are also available
for application considerations. Commonly specified are 316
stainless steel and Carpenter 20 stainless steel for corrosive
immersion heating, copper clad steel for metal casting,
Inconel for high temperature applications, and titanium
for severely corrosive solution heating.
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Minimum Unheated
Section On Each End:
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1-1/4"
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11-1/2"
to 50" |
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1-1/2"
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51"
to 80" |
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1-5/8"
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81"
to 110" |
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1-3/4"
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111"
to 140" |
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2"
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141"
to 170" |
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2-1/4"
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171"
to 192" |
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2-1/2"
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193"
and Longer |
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Sheath
Material
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Max.
Sheath Temperature
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Max.
Watts Per. Sq. In.
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Copper
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350°F/175°C
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55
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Steel
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750°F/400°C
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22
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321
Stainless Steel
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1200°F/650°C
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30
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Incoloy
800 or 840
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1500°F/815°C
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40
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Tolerances
and Limitations
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Sheath Diameter ±.005* |
.210
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.250
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.312
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.375
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.430/.437
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.475/.490
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.625
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| Minimum
Sheath Length |
11-1/2
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11-1/2
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11-1/2
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11-1/2
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11-1/2
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11-1/2
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11-1/2
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Maximum Sheath Length |
144
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144
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240
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240
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312
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312
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250
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| Maximum
Voltage |
240
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250
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250
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480
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575
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575
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575
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| Maximum
Amps |
12
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15
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30
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30
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40
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40
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40
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| Minimum
OHMS/inch of EHL |
.177
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.100
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.060
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.040
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.040
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.040
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.050
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| Maximum
OHMS/inch of EHL |
8
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17
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21
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21
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21
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21
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17
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| Wattage |
+5%
-10%
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Resistance |
+10%
-5%
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| Sheath
Length |
±1/2%
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| Effective
Heated Length |
±1%
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| *
Other diameters are available including metric sizes
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| BUSHING
AND LOCATOR RINGS |
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SHEATH
DIA.
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BUSHING
THREAD SIZE
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HEX
DIM
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A
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B
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.250
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1/2-20
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3/4
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5/8
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3/16
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.312
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1/2-20
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3/4
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5/8
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3/16
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.375
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5/8-18
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7/8
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7/8
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1/4
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.430/.437
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5/8-18
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7/8
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7/8
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1/4
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.475/.490
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3/4-16
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1
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15/16
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1/4
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.625
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7/8-14
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1-1/8
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1-1/8
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1/4
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A threaded
bushing is brazed, welded or ring staked to the sheath
to provide quick, rigid, liquid or air tight mounting
through tank walls, oven walls, etc. Consult Ogden for
bushing specifications not shown.
- Available
in Brass, Stainless Steel or Steel
- All
bushings furnished with nickel plated washer, compressed
non-asbestos gasket and jam nut
- Hex
head bushings standard
- Specify
location from end of sheath
- Locator
washers or retaining rings can also be attached
to the element
- Specify
O.D., thickness and distance from end of sheath
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Terminal
Design page
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Formed tubular
heaters
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Finned
Tubular heaters
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| Ordering Information: |
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- Catalog Number
- Sketch or drawing for factory forming
- Bushings or other options
- Application information including process
temperature, material being heated, corrosive conditions
- Watts
- VoltsDiameter
- Sheath Material
- Sheath Length (SL)
- Effective Heated Length (EHL)
- Type of termination including end seals if
required
- Fins, triangulation or single ended design
- Bend configuration, dimensions and tolerances,
or submit sketch or drawing
- Finish options, distributed wattage, bushing,
stop washers or any other option
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| Important
Notice: By purchasing products from this Site, you acknowledge and
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online store. For more information email us at: info@iprocessmart.com
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| Technical
help and information, Conversions acd corrosion charts, Standards,
heater and motor sizing, Reference iIndustrial iInformation, |
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