heating elements

Koyo Thermo Systems is represented in Europe by
Crystec Technology Trading GmbH

Electrical high temperature heating elements Moldatherm®

Koyo Thermo Systems produces different kinds of heating elements, which have a very low thermal mass, caused by their type of construction. A rather thin resistance heating wire is molded directly into a special ceramic material, following a patented process. The ceramic material also serves as an insulator.


Heater designHeater design

Two types of Moldatherm® heaters are available. The plain type is used in Koyo Thermo Systems conveyor furnaces. It can be used also individually by the customer for the construction of special furnaces or furnace chambers or heating areas. The half cylinder type of the Moldatherm heating elements can be used by customers to design high temperature heating mantles for tubes. A tube-like heating element is used by Koyo Thermo Systems in a special setup for the production of tube heaters for semiconductor tube furnaces. These special LGO heating elements for semiconductor furnaces, tube furnaces and diffusion furnaces are described on a separate page, called "LGO heating elements".

This heating elements can be used for temperatures between 140°C and 1200°C.

On this page, we want to inform customers, who want to realize their own application with Koyo Thermo Systems modular heating elements, about the details of the available heaters. We can also offer you the required temperature control.

Plain Type Moldatherm® Heating Elements

Moldatherm block heating element

Type

Output(W) Voltage(V)

Dimension(mm)

Heating

Area

EXF(mm)

Heater

Area

Row

Terminal Position

PR

PL

No.

G

PR-11

PL-11

1680/55

1390/50

375 (A) X 225 (B)

322X197

8

(1) (2)

30

PR-12

PL-12

375 (A) X 475 (D)

PR-13

PL-13

625 (C) X 225 (B)

PR-21

PL-21

3330/110

2750/100

450 (A) X 375 (B)

406X346

10

(1) (2)

26

PR-22

PL-22

450 (A) X 625 (D)

PR-23

PL-23

700 (C) X 375 (B)

PR-31

PL-31

7480/220

6180/200

750 (A) X 450 (B)

700X422

17

(1) (3)

29

PR-32

PL-32

750 (A) X 690 (D)

PR-33

PL-33

990 (C) X 450 (B)

All heating elements are only available in the specified sizes. The heating elements are relatively easy to cut in the area free of the heating wire and drilling holes, e.g. for thermocouples, is usually not a problem.
The PL type differs from the PR type since the heating elements are preheated in the factory and therefore show smaller shrinkage when heated for the first time. With the PR type, minor changes to the dimensions after installation are to be expected.
The heating elements are available in 3 heating surface sizes (1st digit of the type designation).
As you can see in the pictures above the table, three types of heating elements are available per size (last digit of the type description). Type 1 (Fig. 1; far left) uses almost the entire area for heating, while type 2 (Fig. 2) and 3 (Fig. 3) have insulated areas without heating wire left and right or at the top and bottom. Please compare the column dimensions with the column heating surface in the table.
The 4th picture shows the back of a heating element with the electrical connections. Figure 5 shows a ceramic block without heating wire, which is also available in all available sizes.

Dimensions flat heater PR

Half Cylinder Type Moldatherm® Heating Elements

half cylinder type low thermal mass heating elements

Type

Output(W) Voltage(V)

Inner

Diameter

A (mm)

Outer

Diameter

C (mm)

Length

C (mm)

Heater Length

D (mm)

Heater

Row

Terminal Position

HR

HL

E (mm)

F(mm)

No.

HR-1030

HL-1030

950/55

780/50

100

300

300

238

6

61.8

60

(1)(2)

HR-1045

HL-1045

1250/55

1030/50

450

406

10

53.3

HR-1530

HL-1530

1340/55

1110/50

150

350

300

238

6

62.3

HR-1545

HL-1545

2040/55

1690/50

450

406

10

54

HR-2030

HL-2030

1600/110

1320/100

200

400

300

238

6

61.6

HR-2045

HL-2045

2630/110

2170/100

450

406

10

53.3

HR-3030

HL-3030

2800/110

2310/100

300

550

300

238

6

62.3

80

HR-3045

HL-3045

3980/110

3290/100

450

406

10

54

HR-4045

HL-4045

5410/220

4470/200

400

650

450

406

10

53.3

HR-4060

HL-4060

7340/220

6070/200

600

532

13

65.8

(2)(3)

All heating elements are only available in the specified sizes. Drilling holes, e.g. for thermocouples, is usually not a problem.
Normally, 2 half-cylinder heating elements are put together to form a tubular heating element. With the help of this half-shell design, user-friendly, foldable heating elements can be produced. Alternatively, Koyo can offer complete cylindrical heating elements . However, these are only available as spare parts for Koyo furnaces that are matched to the corresponding systems. The HL type differs from the HR type since the heating elements are preheated in the factory and therefore show smaller shrinkage when heated for the first time. With the HR type, minor changes to the dimensions after installation are to be expected.
The heating elements are available with 5 different diameters and 2 different lengths each.
The heating wires are sunk into the insulation layer; however, a certain distance from the material to be heated is recommended. For example, a pipe that goes through the heating elements should have a maximum of half the inner diameter of the heating element.
The first picture shows the structure of the heating element from the inside. The second picture shows the electrical connections on the outside. There is also insulation material without heating wires for all sizes (third picture).

Drawing half cycle heaters HR

Here is a summary of the special features of Moldatherm® heating elements:


Electric heating elements are suitable for the following temperatures
200░C 300░C 400░C 500░C 600░C 700░C 800░C 900░C 1000░C 1100░C 1200░C