Product details

PRODUCT NAME:

DB Type SiC heating elements

PRODUCT BRIEF

STA DB type SiC heating elements is also a rod type heating elements, but have different diamter for hot zone and cold zone.

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Type DB Dumbbell - (Enlarged Cold End) - Silicon Carbide SiC Heating Elements

 

One of the earliest heating element designs, the enlarged cold ends of the Dumbbell style element were originally made oversized to increase cold end cross section, lowering electrical resistance, thereby lowering cold end operating temperature. Modern Dumbbell DB SiC heater, by contrast, employ an advanced technology to keep the terminal ends cool by virtue of the decreased resistivity of the lower resistance cold end material used in the manufacturing process. Oversize cold ends are therefore no longer necessary. Non-dumbbell (ED type) can be substituted for Dumbbell SiC heater. Improvements in the cold-end-to-hot-zone resistance ratio between the original DB and new DB SiC heater have been dramatic. The old style resistance ratio was 1:3, whereas the new DB and ED resistance ratio is a minimum of 1:15.

 

The first several inches of the cold ends are metalized with aluminum to provide a low-resistance contact surface. Electrical connections are made using flat aluminum braids, held in compression to the cold end circumference by stainless steel spring clamps.

 

DB SiC heater are described by giving the overall length, the heating section length, the hot zone outer diameter and the cold end outer diameter.

 

DB type SiC heater standard diameter

 

Diameter of HZ(mm)

8

12

14

18

25

30

35

50

Diameter of CZ(mm)

14

18

22

28

38

45

50

60

 

Type: DB          Diameter: D1/D2, mm

Hot zone length: HZ, mm

Cold end length: CZ, mm

Overall length: OL, mm

 

Examples

DB type, D1/D2=18/28mm,  HZ=300mm

CZ=350mm, OL=1000mm, Resistance 1.70Ω

Writing example:

STA DB, 18 x HZ 300 x OL1000 x R 1.70Ω


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