Products > Cartridge heaters > Medium density cartridge heaters > Presentation and applications examples

This type of product has been conceived for large-size heating which requires high powers and high temperatures. The heating wire is maintained in magnesia (MgO) which is heavily compressed.

Electrical characteristics Dimensions and tolerances Caution before use Examples of assembly The different types of CCMC

 

Stainless steel tube (aisi 304L). The state of surface is obtained by mechanical polishing.

Electrical characteristics

 

Max. voltage	480 V
Max. voltage	15 A
Tolerance on the power	+5 % -10 %
Tolerance on the resistance under heat	+10 % -5%
Coefficient of temperature on the heater	1.05

 

Dimensions and tolerances

 

CCMC Ø	8	15.87	16	16.3	18	19.05	20
Tolerance on Ø	+ or - 0.05	+0 -0.1	+0 -0.1	+0 -0.3	+0 -0.1	+0 -0.1	+0 -0.1
Min. NC at the lead	35	50mm
Min. length	260	300mm
Max. length	3000	2000mm
Tolerance on length		+ or - 2% of the length
Max. camber		0.15% of the length

• The acceptable charge (W/cm²) on the heater depends on the type of regulation and on the cycles of warming up and stopping.
• Case of an on/off regulation : the acceptable for 1 minute regulation cycles is 30% smaller than for continious temperature cycles.
• Therefore do not oversize heaters' power thinking that regulation will do the rest or install a power controller with triac.
• The hole fit of assembly has a great impact on cartridges' life.
• Note that tools' corrosion alters boring dimensions and increases the hole fit of assembly. Then, the rebore during the change of the cartridge increases the hole fit too.
• Thermal grease : our thermal grease withstands 1100°C and the metallic particles which compose it further a good thermal transfer.
• Beware of not using it in an hermetic casing, as its organic components can go into the cartridge and create short circuits.

Incorrect the heating part radiates outside.
Incorrect the heating part radiates outside.
Correct but be careful : by conduction in the metallic unit, cables are subjected to a rise in temperature.
Correct the connection is free from the unit. It is the preferential solution.

CCMC 1BR or CCMC 1BT Flexible lead connection with ceramic head   used most frequently. economical solution.
CCMC SS, CCMC 1BS ou CCMC 2BS Without ceramic head and with flexible lead connection.   On demand. When it is the best technical solution. More expensive solution than with rigid lead connections.
CCMC 4B Rigid connection at each end   Application requiring a high power and a high temperature which can be superior to traditional tubular element.