W A T R O D T U B U L A R H E A T E R S

Moisture Resistance Seals

WATRODs MgO insulating material is hygroscopic. To prevent moisture contamination from entering the heater, an appropriate moisture seal must be used. Choosing the correct seal is important to the life and performance of the heater. Be sure the maximum continuous use temperatures is not exceeded at the seal location. Most end seals are applied with a small cavity in the end of the heater. The seal will also help prevent arching at the terminal ends.

Applications

• Hot runner molds

WATROD Termination Options

Bend Formations

Single-Ended WATROD

Watlow does not recommend field bending single-ended WATROD elements. The minimum radius of the bend and the straight length beyond the bend limits formation. The radius must be 76 mm (3 in.) or more for the heated length’s end to be inside a bend.

Double-Ended WATROD

Double-ended WATROD heating elements can be formed into spirals, compounds, multi-axis and multi-planes from 36 common bend configurations. Custom bending with tighter tolerances can be made to meet specific application needs.

The minimum bend radius and the straight length required beyond the bend limits formation. In order to locate the end of a heated length within a bend, the radius must be 76 mm

(3 in.) or larger. Additionally, overall length tolerances must be included in one or more of the straight lengths.

Double-ended WATROD elements are available with a variety of terminations. Single-ended WATROD elements are available with only flexible lead wires. The following table and illustrations detail the terminations available with double- or single-ended WATRODs – for each available sheath diameter.

Standard flexible lead wires are 305 mm (12 in.) unless otherwise specified. Insulation options include TGGT (250°C/480°F) plus other temperature ratings. Consult factory for availability. Overmolds are available for flexible lead wires only and are available in silicone rubber (200°C/390°F), neoprene (90°C/212°F) and other materials. Consult your Watlow representative for details.

 

Sheath

Threaded

 

Screw Lug

 

Quick Connect

 

Flexible

Lead Wire

WATROD

Diameter

Studa

 

 

(Plate)

 

 

(Spade)

 

Lead Wires

Overmolds

Element

mm

inch

A

B

 

C

D

E

F

G

H

J

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Double-Ended

6.6

0.260

#6-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

Yes

 

8.0

0.315

#10-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

Yes

 

8.5

0.335

#10-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

No

 

9.5

0.375

#10-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

No

 

10.9

0.430

#10-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

Yes

 

12.0

0.475

#10-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

Yes

 

12.4

0.490

#10-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

No

 

15.9

0.625

#10-32

Yes

 

Yes

Yes

Yes

Yes

 

Yes

Yes

No

Single-Ended

9.5

0.375

No

No

 

No

No

No

No

 

No

Yes

No

 

10.9

0.430

No

No

 

No

No

No

No

 

No

Yes

Yes

 

12.0

0.475

No

No

 

No

No

No

No

 

No

Yes

Yes

 

12.4

0.490

No

No

 

No

No

No

No

 

No

Yes

No

 

15.9

0.625

No

No

 

No

No

No

No

 

No

Yes

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Watlow Electric Electric Tubular Heaters manual Moisture Resistance Seals, Applications

Electric Tubular Heaters specifications

Watlow Electric is a leading manufacturer of electric tubular heaters, renowned for their innovative design and reliable performance. These heaters, also known as tubular heating elements, are versatile and can be used in a variety of industrial applications, including heating fluids, gases, and solid materials. One of the main features of Watlow's electric tubular heaters is their robust construction. Made from high-quality materials such as stainless steel or Incoloy, these heaters are designed to withstand extreme temperatures and harsh environments, ensuring long-lasting performance.

Watlow's tubular heaters come in a variety of sizes and watt densities, making them suitable for numerous applications. They can be customized to meet specific requirements, including length, diameter, and termination type. This flexibility allows engineers to design systems tailored to their unique heating needs, whether in food processing, water heating, or chemical processing sectors.

One of the key technologies employed in Watlow tubular heaters is their advanced insulation and sheathing materials. This technology not only enhances the efficiency of the heating elements but also improves safety by reducing the risk of overheating and energy loss. Watlow also implements precision control technology in its heating solutions, which provides accurate temperature regulation and improved energy efficiency. This is critical in applications where temperature consistency is crucial for product quality.

Additionally, Watlow electric tubular heaters can be integrated with advanced control systems and sensors, allowing for real-time monitoring and adjustments. This modern connectivity facilitates predictive maintenance, minimizing downtime, and maximizing operational efficiency. The heaters are also designed to comply with various industry standards, ensuring they meet regulatory requirements for safety and performance.

In summary, Watlow Electric tubular heaters are recognized for their durability, customization options, and advanced technological features. With a focus on energy efficiency, precision control, and robust construction, these heaters are well-suited for a wide range of industrial applications, making them a preferred choice for manufacturers and engineers worldwide. Their commitment to innovation and quality has solidified Watlow's position as a trusted supplier in the electric heating market.