Heater catalog - Watlow

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and Heaters

Watlow stocks THINBAND barrel

heaters ranging in diameters from three to nine inches (76.2 to 228.6 mm) in X inch (6.35 mm) increments and widths in 1 >2 inch (38.1 mm), two inch and three inch (50.8 and 76.2 mm). Watlow can combine these sizes, creating a two-piece assembly ranging from nine to 18 inches (228.6 to 457.2 mm) in diameter, and any combination between three and 18 inches (76.2 and 457.2 mm) as a two-piece assembly. This versatility should satisfy almost any requirements whether millimeter or inch size barrels.

Regarding possible slight wattage differences from your original heater to your THINBAND replacement you must keep in mind that about 80 percent of the wattage is required to bring the barrel up to temperature. The 20 percent remaining is used to offset radiation and convection heat losses. So, if you have a 550 watt heater there is no harm in using a

500 or 600 watt stock THINBAND

barrel heater.

There are three approaches to receive a THINBAND combination from stock. To illustrate, let's examine a customer who needs a 10 inch (254 mm) diameter heater but neither the size or width needed is in stock.

THINBAND Mica Barrel and Nozzle

How to Utilize Watlow's Universal THINBAND Barrel Stock Program

Various diameters and widths of Watlow's unique patented flexible THINBAND barrel heaters are available with LA termination's for shipment faster than any in the market because of Watlow's unique stocking program.

Solutions:

#1)Take two five-inch (127 mm) diameter heaters and curve to a 10 inch (254 mm) diameter. Please note that a Quick Clamp has to be added order for the heater to fit. This heater is offered next day delivery.

#2) Take two THINBANDs as noted in #1 but mix each diameter. For example, one four-inch (101.6 mm) and one six-inch (152.4 mm) diameter or a 4% (120.6 mm) diameter with a 5 X (133.3 mm) diameter equal 10 inches (254 mm). Again you need a Quick Clamp. This heater is also offered next day delivery.

#3)Take two THINBANDs as in #1 or #2 but subtract a X inch (6.35 mm) to the diameter and supply without the Quick Clamp for same day delivery. For example for a 10 inch (254 mm) diameter, any combination of 9X inch (248 mm) should be supplied to fit the 10 inch (254 mm) diameter requirement. The reason you have to reduce your selection size by a X inch (6.35 mm) is to ensure a gap when tightening the clamp b ars otherwise you will run out of gap and the bars will touch before you can tighten the heater completely to the barrel. This is only necessary when Quick Clamp is not included.

Installation Procedures

1. Install heaters over a clean surface.

2. After installing the unit, begin to tighten the clamp screw. The clamping screw is Xinch-20 x 1X inch, allen head cap screw. Begin tightening the clamp bars. If the clamp bars appear not to have seated, tap the clamp bars with a small industrial hammer to insure the bars are well seated in the angle formed by the 60 degree bent tab and the heater.

3. If the bar has multiple screws, alternately tighten the screws as you would the lug nuts on a car wheel to insure even loading.

4. Torque all screws to approximately 8 ft-lbs.

5. Take a soft rubber mallet and tap gently around the circumference of the heater while tightening the screws. This will ensure the heater fit to the barrel is maximized without any air gaps.

6. When installing terminal lugs, torque the top nuts to 30 in-lbs. The bottom nut should not be touched as it is factory torqued to 45 in-lbs. at assembly.

7. Retighten the heater after the heater has operated for a short time. Always make adjustments when the heater and cylinder are cold.