high temperature furnace silicon carbide single spiral tubular heater

1.spiral tubular heater 2.up to 1700 celsius 3.rod,u,w,h,gun,spiral,dumbbell,door shape 4.accurate resistance 5.ISO 9001

high temperature furnace silicon carbide single spiral tubular heater  

1.The General Description of  silicon carbide heating element

1)production process:made into blank,silicided under high temperature and re-crystallized.

2)character: high-applied temperature ,anti-oxidization ,anti-corrosion ,long service life ,little deformation,easy installation and maintenance.

3)usage: used in various high temperature electric furnaces and other electric heating devices,such as in the industries of magnet,ceramics,metallurgy ,glass,and machinery.

4) physical properties of sic heating element 

specific gravity	2.6~2.8g/cm³	bend strength	>300kg
hardness	>9 MOH′S	Tensile strength	>150kg/cm³
porosity  rate	<30%	radiancy	0.85

5)Recommend surface load

Furnace Temp (°c )	1100	1200	1300	1350	1400	1450
Surface load of hot zone (W/cm²)	<17	<13	<9	<7	<5	<4

6)Technical parameter of rod type silicon carbide heating element

OD (Diameter)	HZ (Hot Zone)	CZ (Cold Zone)	OL (Total Length)	Resistance
8mm	100-300mm	60-200mm	240-700mm	2.1-8.6 ohms
12mm	100-400mm	100-350mm	300-1100mm	0.8-5.8 ohms
14mm	100-500mm	150-350mm	400-1200mm	0.7-5.6 ohms
16mm	200-600mm	200-350mm	600-1300mm	0.7-4.4 ohms
18mm	200-800mm	200-400mm	600-1600mm	0.7-5.8 ohms
20mm	200-800mm	250-600mm	700-2000mm	0.6-6.0 ohms
25mm	200-1200mm	250-700mm	700-2600mm	0.4-5.0 ohms
30mm	300-2000mm	250-800mm	800-3600mm	0.4-4.0 ohms
35mm	400-2000mm	250-800mm	900-3600mm	0.5-3.6 ohms
40mm	500-2700mm	250-800mm	1000-4300mm	0.5-3.4 ohms
45mm	500-3000mm	250-750mm	1000-4500mm	0.3-3.0 ohms
50mm	600-2500mm	300-750mm	1200-4000mm	0.3-2.5 ohms
54mm	600-2500mm	300-750mm	1200-4000mm	0.3-3.0 ohms

2.Electric property of silicon carbide heating element

Sic heating elementshave rather large specific resistance.When it is heated in air and the surface temperature of the hot zone reaches 1050°C,it's resistance rate is 600-1400mm2/mm and its resistance value changes as the temperature rises which is negative value from room-temperature to 800 °C  and is postive value nature over 800 °C .

The key factor to the optimum service life of the element is to select the surface load of the element correctly according to the furnace construction,atmosphere and temperature.The figure shows the relation between furnace temperatures,element temperature and element surface load under the condition that the element radiation is not obstructed.

3. Advices of using silicon carbide heating element

1)In order to keep furnace temperature and the charges uniform of each element, before installation resistance distribution must be carried.

2)As the element is very brittle ,be careful while install and maintain to avoid any damage.

3)when start to operate the furnace ,raise voltage slowly and gradually,never give full load at one time.

4.When you place order,pls tell us following data

1)Outer diameter(OD):mm

2)Length of Hot zone(HZ):mm

3)Length of Cold end(CZ):mm

4)Length of Overall(OL):mm

5)Shank spacing(A):mm

6)Resistance(at 1050C+/-50C)

More than 20 years production experience.

Up to 1700 celsius high temperature.

All the resistance of sic heating element are tested twice to make sure the resistance is accurate.

All the specifications can be made according to your request.

Welcome to our factory!

high temperature furnace silicon carbide single spiral tubular heater