Backer Hotwatt Immersion Heaters

 

IMMERSION Heaters

Immersion Heaters are a common heating solution that are used to heat a variety of liquids including water, oil, chemicals and inert gases. Hotwatt provides a full line of energy efficient spec and custom manufactured heating elements for a broad variety of heating applications including:

Heaters are designed to meet optimal heat transfer for heating liquids to meet low to high temperature needs.

Availability: In Stock
Description

U.L. Recognized – E56973
C.S.A. Certified – 16386-0-000

Cartridge Heaters: Immersion In-Stock

Features
  • The Backer Hotwatt Immersion Heater may be supplied with various junction boxes for additional terminal or lead protection.
  • For corrosive environments, units can be supplied in other special alloys best suited to the operating conditions.
  • The lead end of the unit may be sealed for extreme environmental conditions.
  • Units may be supplied for three phase or three heat operation.
  • Made in U.S.A.
Construction
Immersion Cartridge Heater Illustrated Construction
  1. Welded end.
  2. Mica.
  3. Magnesium oxide packing.
  4. Element wire situated in close proximity to outside surface for maximum heat transfer and minimum internal temperature while preserving good dielectric qualities.
  5. Series 316 stainless steel sheath.
  6. Mounting bushing.
  7. Ceramic cap.
  8. Flexible stranded nickel alloy insulated leads or rust resistant post terminals.
Standard Immersion Heater
immersion write

Available Bushings: Must be specified after catalog number.

Brass Bushings
SF25A: Single

sf25a

SF25B: Coupling Head

sf25b

Stainless Steel Bushings
SF25C: Single

sf25c

SF25D: Coupling Head

sf25d

* Wattages are based on a unit operating immersed in water. For heating other materials, see technical information catalog below. View page 148 for Suggested Watt Densities or pages 152-155 for Sheath Materials.

 

* Lengths between and longer than those listed may be ordered.

* Red catalog number denotes stock item in below tables. See stock section for specific ratings.

1/4″ Diameter
NPT Size: 1/8″
Standard Termination: 6″ Leads (SF1-6)
Maximum Amperage: 3.5
AF: 7/16″ C: 1/2″ D: 3/8″

3/8″ Diameter
NPT Size: 1/4″
Standard Termination: 6″Leads (SF1-6)
Maximum Amperage: 6.0
AF: 5/8″ C: 9/16″ D: 7/16″

Length
A

Catalog
Number

Max.Watt.
in Water

Length
A

Catalog
Number

Max.Watt.
in Water

2″

EM25-2

115

2″

EM37-2

130

3″

EM25-3

185

3″

EM37-3

240

4″

EM25-4

255

4″

EM37-4

345

5″

EM25-5

325

5″

EM37-5

450

6″

EM25-6

395

6″

EM37-6

555

7″

EM25-7

465

7″

EM37-7

660

1/2″ Diameter

NPT Size:

3/8″

Standard Termination:

6″ Leads (SF1-6)

Maximum Amperage:

3.5

AF: 11/16″ C: 5/8″ D: 7/16″

5/8″ Diameter
NPT Size:

1/2″

Standard Termination:

6″Leads (SF1-6)

Maximum Amperage:

6.0

AF: 7/8″ C: 3/4″ D: 9/16″

Length
A

Catalog
Number

Max.Watt.
in Water

Length
A

Catalog
Number

Max.Watt.
in Water

3″

EM50-3

360

3″

EM62-3

430

4″

EM50-4

505

4″

EM62-4

605

5″

EM50-5

635

5″

EM62-5

785

6″

EM50-6

765

6″

EM62-6

1060

7″

EM50-7

895

7″

EM62-7

1135

8″

EM50-8

1030

8″

EM62-8

1310

3/4″ Diameter
NPT Size: 3/4″
Standard Termination: 6″ Leads (SF1-6)
Maximum Amperage: 15
AF: 1 1/8″ C: 7/8″ D: 5/8″

1″ Diameter
NPT Size: 1″
Standard Termination: 8-32 Screw & Nut(SF3)
Maximum Amperage: 25
AF: 1 1/2″ C: 15/16″ D: 11/16″

Length
A

Catalog
Number

Max.Watt.
in Water

Length
A

Catalog
Number

Max.Watt.
in Water

4″

EM75-4

705

5″

EM1.0-5

1195

5″

EM75-5

915

6″

EM1.0-6

1495

6″

EM75-6

1130

7″

EM1.0-7

1795

7″

EM75-7

1340

8″

EM1.0-8

2095

8″

EM75-8

1555

9″

EM1.0-9

2395

9″

EM75-9

1765

10″

EM1.0-10

2695

1 1/4″ Diameter
NPT Size: 1 1/4″
Standard Termination: 10-32 Screw & Nut (SF3)
Maximum Amperage: 30
AF: 1 3/4″ C: 1 1/32″ D: 23/32″

1.9″ Diameter
NPT Size: 2″
Standard Termination: 6″ Leads (SF1-6)
Maximum Amperage: 40
AF: 2 1/2″ C: 1 7/16″ D: 11/16″

Length
A

Catalog
Number

Max.Watt.
in Water

Length
A

Catalog
Number

Max.Watt.
in Water

6″

EM1.2-6

1690

10″

EM1.9-10

4200

7″

EM1.2-7

2145

12″

EM1.9-12

5000

8″

EM1.2-8

2600

16″

EM1.9-16

6700

10″

EM1.2-10

3055

20″

EM1.9-20

8400

11″

EM1.2-11

3280

   

12″

EM1.2-12

3505

24″

EM1.9-24

10000

14″

EM1.2-14

3960

30″

EM1.9-30

12600

2.3″ Diameter
NPT Size: 2 1/2″
Standard Termination: 6″ Leads (SF1-6)
Maximum Amperage: 50.0
AF: 3″ C: 1 3/4″ D: 7/8″

Length
A

Catalog
Number

Max.Watt.
in Water

12″

EM2.3-12

6000

18″

EM2.3-18

9000

24″

EM2.3-24

12000

30″

EM2.3-30

15000

36″

EM2.3-36

18000

42″

EM2.3-42

21000

Termination Enclosure Options

Lengths between or longer than those listed may be ordered.

SF13A: General purpose box.
NEMA No.1. 2 3/4″ x 1 1/2″ x 1 1/2″

sf13a

Available on: 1/4″ to 1″ diameter.

SF13B: Moisture resistant box.
Mounted on NPT coupling head fitting.

sf13b

Available on: 3/8″ to 1 1/4″ diameter.

SF13C: Explosion resistant box.
Mounted on NPT coupling head fitting

sf13c

Available on: 3/8″ to 1 1/4″ diameter.

SF13D: General purpose box.
NEMA No.1. Rust resistant steel 4″octagonal

sf13d

Available on: 1 1/4″ to 2 3/8″ diameter

Standard Immersion Heater

SF26: Stainless steel flange. Mounting hole centers for 1/4″ to 5/8″ diameters is 1 1/8″ and for 3/4″ diameter is 1 5/32″. Special flange sizes available upon request.

sf26

SF27: Stainless steel riser and support feet for over the side immersion heaters. Consult factory for availability.

sf27

XS76: Straight thread with nut. Specify thread size and if bushing is to be standard (hex outside vessel) or inverted (hex inside vessel)

xs76

Voltage
Standard voltages are either 120V or 240V.
Other voltages are available.
Tolerances
Wattage tolerances are held to +5%, -10%
at rated voltage. Length tolerances are ±2%
with a ±1/16″ minimum.

How To Order

After determining the wattage required and the line voltage available, determine the physical space available for heaters and the number of heaters required.
Review Immersion Heaters In-Stock.
Specify: Catalog number, wattage, voltage, lead type, bushing type, and special features if required.
Example: EM62-6/700W/240V/SF1-12/SF13A/SF25B