Watlow THINBAND Data sheet

W A T L O W

Clamping Bars

Zinc Steel
Inner Sheath

Aluminized
Steel Outside
Diameter
Sheath

Resistance
Ribbon

Mica Insulation

Post Terminals

Side Folds
to the Inside
Diameter

Band Heaters

THINBAND®Mica
Barrel and Nozzle

The THINBAND®heater is Watlow’s
patented redesign of the mica band.
THINBAND heaters deliver fast and
install easily, keeping costs down
and machines running.

Performance Capabilities

• Sheath temperatures to 480°C
(900°F)

• Watt densities to 55 W/in
(8.5 W/cm2)

2

Same day shipment on more than 1000 variations

•
f THINBAND heaters.

o

Band Heaters

Features and Benefits

Flexible, one-piece design

• Makes installation easier on
plastic pr

ocessing equipment
because it can open to full
diameter of the barrel without
internal damage to the heater

• Installs on a barrel without
removing other band heaters
already in place

Same day shipment on more than
1,000 variations available because
of Watlow’s Lead Adapter (LA)
manufacturing method

• Reduces inventories and costly
downtimes

Only one set of leads or terminals

• Cumbersome, two-piece
replacement band heaters with
straps require two sets

Quick clamp

• Opens to fit over barrels and
snaps in place with one easy flip
of its latching lever

• No need to remove other heaters

Permanently attached clamping
bars

No folds on the outside of the
heater

Contamination r

•

esistance

Applications

• Extruders

• Blown film dies

• Injection molding machines

• Other cylinder heating
applications

1

20 30 40 50

Watt Density—W/in

2

700

500

300

800

900

1000

1100

600

400

200

10 60

500

400

300

200

2

4 68

100

Cylinder Temperature—°F

Cylinder Temperature—°C

Watt Density—W/cm

2

10 in. (254 mm) Dia.

3 in. (76.2 mm) Dia.

1

1

/

2

in. (38.1 mm) Dia.

Band Heaters

THINBAND Mica
Barrel and Nozzle

Applications and
Technical Data

Operating Factors

Use as low a watt density rating as your
application permits. A close match of
the heat supplied to the actual require­ments will reduce temperature
overshoot, reduce cycling and increase
the life of any band heater you use.

Calculate the
for your heater using:

Heated Area x Maximum
Watt Density

Calculate the heated area of your band
heater by subtracting the no-heat area
from the total area in contact with the
cylinder (3.14 x I.D. x width). Subtract
the no-heat area at the terminals (from
table) and any additional no-heat area
caused by holes, slots or oversize gaps.

Determine the maximum watt density of
your heater from the Maximum
Allowable Watt Density graph. The
curves are based on narrow heaters
mounted on a smooth, steel cylinder.
Apply the necessary correction factors:

• For heaters 2
five inches wide (127 mm), multiply
watt density by 0.8.

• For high expansion cylinders
(aluminum or brass), reduce the watt
density by 3 W/in

• For heaters 21⁄4 inches to five inches
(57 mm to 127 mm) wide installed
on a high expansion cylinder,

educe watt density by a total of

r
3 W/in2(0.46 W/cm2) only.

• For regular cylinder surfaces other
than smooth, machined fi
reduce watt density by 3 W/in
(0.46 W/cm2).

For heaters that will be insulated

•
or enclosed, contact Watlow for
specific watt densities.

For units gr

•
(355 mm) diameter, consult the

THINBAND Recommended
Clamping Options graph.

• For units used in vertical
applications, consult factory for
application assistance.

2

safe maximum wattage

1

⁄4 inches (57 mm) to

2

(0.46 W/cm2).

nish,

2

eater than 14 inches

No-Heat Area for THINBAND Barrel (All Terminations)

Heater Size No-Heat Area

Heater

Type in. (mm) in. (mm) in. (mm)

One Piece Less than 21⁄2 (63.5) Up to 7 (177.8) 11⁄4 (31.75) x width

Two Piece 5 (127) or more More than 3 (76.2) 2

Diameter Width

MMaaxxiimmuumm AAlllloowwaabbllee WWaatttt DDeennssiittyy

Standard Gap 3⁄8 in.

1

⁄2 (63.5) x width

W A T L O W

Band Heaters

THINBAND Mica
Barrel and Nozzle

Physical Limitations of
Lead Variations

Check the table to be certain the
variations and lead arrangements
you order are available on the
heater size you require. If you need
to exceed any limitations, please
contact a Watlow representative.

THINBAND Barrel

11⁄4 in.
(32 mm)

Minimum
21⁄2 in. (63 mm)
Maximum
141⁄2 in. (368 mm) 1pc.
29 in. (736 mm) 2 pc.

10-24
thread

0.156 in.
(3.9 mm)

Physical Limitations of Lead Variations

Diameter Width

Heater Type Min. Max. Min. Max.

in. (mm) in. (mm) in. (mm) in. (mm)

1 pc. const. 1 (25.4) 141⁄2 (368.3) 11⁄2 (38.1) 7 (177.8)
2 pc. const. 5 (127) 29 (736.6) 1

Nozzle

Type A 1 (25.4) 4 (101.6) 1 (25.4) 6 (152.4)
Type L 1 (25.4) 4 (101.6) 1 (25.4) 6 (152.4)

Barrel

Type T 21⁄2 (63.5) 11⁄2 (38.1) 7 (177.8)

ype H 2

T
Type F, FR 2
Type E 2
Type C, BR 2
Type K, KR 21⁄2 (63.5) 11⁄2 (38.1) 7 (177.8)

Terminal Box 31⁄2 (88.9) 11⁄2 (38.1) 7 (177.8)
European Plug
1 pc. vertical 2
1 pc. horizontal 2
Welded Barrel Nuts
1 pc. 21⁄2 (63.5) 141⁄2 (368.3) 11⁄2 (38.1) 7 (177.8)

Note: Some combinations of maximums and minimums cannot occur on the
same heater. Check the table to be certain the variations and lead arrangements
you order are available on the heater size you require. If you need to exceed
any limitations, please contact your Watlow representative.

Standard gap is 3⁄8 inch (9.53 mm) between clamp bars.

1

63.5) 1

⁄2 (

1

⁄2 (63.5) 11⁄2 (38.1) 7 (177.8)

1

⁄2 (63.5) 11⁄2 (38.1) 7 (177.8)

1

⁄2 (63.5) 11⁄2 (38.1) 7 (177.8)

1

⁄2 (63.5) 141⁄2 (368.3) 11⁄2 (38.1) 7 (177.8)

1

⁄2 (63.5) 141⁄2 (368.3) 11⁄2 (38.1) 7 (177.8)

1

⁄2 (38.1) 7 (177.8)

1

38.1) 7 (177.8)

⁄2 (

Band Heaters

9

⁄16 in.

(14 mm)

Minimum 11⁄2 in. (38 mm)
Maximum 7 in. (177 mm)

3

Band Heaters

Coil Spring

For 2 piece only:
Clamp bar at other gap

50

40

30

20

10

2 468102 12 14 16 18 20

22 24

26 28

Watt Density (W/in

2

)

Diameter (inches)

Clamp Bars

QUICK CLAMP

For 2 piece:
Clamp bar at other gap

Clamp Bars

Or QUICK CLAMP
above 4 in. (101.6 mm) diameter

2 Piece

Diameter (millimeters)

76 127 178 229 279 330 381 432 483 533 584 635 686 737

Watt Density (W/cm

2

)

2

3

4

5

6

7

1 Piece

Above Recommended Watt Density

Consult Engineering

DD

1

/

2

"

(12.7 mm)

21/8"

(54 mm)

THINBAND Mica
Barrel and Nozzle

Barrel Heater
QUICK CLAMP Option

With QUICK CLAMP, the THINBAND
heater can be secured tightly in
place in a matter of seconds. The
spring-loaded clamp secures the
heater tightly around the barrel with
an easy flip of the lever.

Features and Benefi

• THINBAND with QUICK CLAMP
fits over barrels and snaps in
place with easy flip of its latching
lever.

• Hot change-outs are completed
in seconds.

• Spring tensioned clamp keeps
the THINBAND heater tight
against barrel—will not loosen
over time.

ts

QUICK CLAMP eliminates tools, loose parts and hassle

THINBAND opens up to fit over

•
barrel. There is no need to
remove other heaters.

One easy flip of the latching lever

•
and QUICK CLAMP shuts,
completing installation.

Clearance Dimensions

Width Range Number of Distance Between Clamps

in. (mm) QUICK CLAMPS in. (mm)

11⁄2 (38.1) to 211⁄16 (69.3) 1 NA

3

⁄4 (69.9) to 311⁄16 (94.8) 2 11⁄2 (12.7)

2
33⁄4 (69.9) to 411⁄16 (120.1) 2 1 (25.4)
43⁄4 (120.6) to 511⁄16 (145.5) 3 11⁄2 (12.7)
53⁄4 (146.1) to 711⁄16 (145.5) 3 1 (25.4)

• Ideal for vertical applications.

• Available on selected stock
and made-to-order THINBAND
barrel heaters—minimum 4 inch
(100 mm) diameter, 1
(38 mm) width.

• Standard gap is 1⁄2 inch.

Recommended
Clamping Options

THINBAND Barrel Pr

1

⁄2 inch

oducts

Notes: Widths four inches (101.6 mm) and
over add two inches (50.8 mm) to diameter
then reference chart clamp selection.

4

W A T L O W

0.75 in.

(19 mm)

5.8 in. (147 mm)

0

.563 in.

(14 mm)

T

ig Welded

Band Heaters

THINBAND Mica
Barrel and Nozzle

Barrel Heater
Clamping Variations

Tig Welded Barrel Nuts with Spring Loaded Clamping

Non-Stock Option

Tig welded barrel nuts with spring
loaded clamping are used during
start-up to maintain a tight heater
fit on large barrels. Stainless steel
top metal is required.

Tig Welded Barrel Nuts

An ideal way to provide access
for instrumentation is to specify an
oversized gap between the heater
ends. If the THINBAND clamp bar
screw interferes with the positioning
of the instrumentation device,

Clamping Pads

Clamping pads are used when an
obstruction would prevent a
standard full circumferential heater
from fitting completely around a
machine barrel. The clamping pads

Refer to the THINBAND Recom-
mended Clamping Options graph.
This option is mandatory on vertical
applications. To order, specify

spring loaded clamping.

tig welded barrel nuts are recom­mended. Stainless steel top metal is
required. Maximum gap is one inch
(25 mm) Specify

tig welded barrel

nuts and gap dimension when

ordering.

have a hole to allow easy fastening
to the machine barrel.

Dimensional

drawing required or customer
supplied sample heater when

ordering.

Band Heaters

Variations

Non-Stoc

k Option

Holes

An economical way to provide
access for instrumentation is to
specify an oversized gap between
the heater ends. A hole in the sheath
should be specified only when all the
cylinder surface adjacent to the hole
must be heated. When required,

one hole may be provided in
nearly any location as long as

there is at least one inch (25 mm)
between the hole and one side of
the heater
to two inches (51 mm) diameter

. Standard hole sizes up

.

Consult factory for limitations. For

oper hole location, a

pr

dimensional
drawing or custom supplied
sample heater is required.

5

Band Heaters

1

3

/

4

in.

(45 mm)

1

3

/

8

in.

(35 mm)

1

7

/

8

in.

(48 mm)

2

3

/

8

in.

(60 mm)

2

7

/

8

in.

(73 mm)

THINBAND Mica
Barrel and Nozzle

Barrel Heater Variations

Continued

Stock LA Option

Stock Option

Non-Stock Option

Stock Option

Two-Piece Band Heaters

Two-piece construction is available
on heaters five inches (127 mm) or
greater in diameter. Heaters

1

⁄2 inches (38 mm) wide and greater

1
with post terminals have the two
terminals side-by-side.

Note: When ordering two-piece
band heaters, specify the volts and
watts per half. On two-piece units
with leads, you must also specify the

per half may be wired in series to a
480V

Å(ac) power supply. In this
case the band heater lead wire
insulation must be rated for

Å(ac). Available from stock by

480V
combining two one-piece heaters to
create a large diameter. Terminations
will be 90 degrees from each gap.
QUICK CLAMP must be supplied at
one gap when ordering.

power supply voltage. Example:
a two-piece band that is 240VÅ(ac)

High Temperature “Quick Disconnect” European Style Plugs

They provide the simplest and
safest way to apply power to band
heaters. The combination of high
temperature male and female quick
disconnect plug assemblies
eliminates all live exposed terminals

and electrical wiring that can be a
potential hazard to employees or
machine. Maximum 15 amps at
240VÅ(ac), maximum 240 volts.
When ordering, specify vertical or

horizontal European plug.

Vertical

Stock Option

Code # N6027AF049

6

Right Angle

Horizontal

Stock Option

Code # N6027ZZ028

Straight

emperature “Quick Disconnect” European Style Female Adapters

T

High

Available as an accessory item that
must be used in conjunction with

Specify code number N6027AF049
or N6027ZZ028 and quantity.

high temperature “quick disconnect”
European style plugs.