SGR type Double Spiral Silicon Carbide Heating Element Max temperature 1625 ℃

What is SGR type Double Spiral Silicon Carbide Heating Element?

SGR type Double Spiral Silicon Carbide Heating Element similarly to Single spiral type.

SGR type Double Spiral Silicon Carbide Heating Element is a tubular element with a spiral-grooved heating section, and as a major characteristic, both electrical connections are found at one end only.Sunshie double spiral silicon carbide heating element is crafted from special materials. It features a hot zone density of 2.8 g/cm³ and can operate at temperatures up to 1625°C, ensuring a very long working life. One end of the wire is designed for easy installation.

Double spiral Double Spiral Silicon Carbide Heating Element(SGR type SiC Heater Element) is a kind of electric heating element with one end connection. The heating end is spiral, the upper and lower parts are cold ends, the upper part is conductive end, and the lower part is supporting end.

The cold end is divided into two parts by a gap cut vertically from the middle, which is connected to the positive and negative terminals of the power supply.

Production process	Made into blank, silicided under high temperature and re-crystallized.
Weight	According to size
Classification	Furnace heater
Packing	Cartoon box inside, Polyfoam filled, Wooden box outside
After-sales Service Provided	Overseas service center available
Power Source	Electric
Material	Above 99% Silicon carbide, Silicon Carbide (SiC)
Also called	Sic resistance / sic heater / silicon carbide heater rod
Flexure strength	98MPa
Porosity	5%
Heat conductivity (hot end)	16-21W/m+℃ at 1000℃
Specific heat	1.0 kj/kg+℃ at 25℃-1300℃
Specific resistance (hot end)	0.016Ω cm at 1000℃
The coefficient of thermal expansion	4.5×10-6

SGR type Double Spiral Silicon Carbide Heating Element is energy-conserving, convenient and easy to install due to the same-end terminal structure.

Model number and reference data for SGR type Double Spiral Silicon Carbide Heating Element

SGR type Double Spiral Silicon Carbide Heating Element regular size

SGR TYPE
					Φ(mm)		OL(mm)
HEATER					Φ16		30+10-5
					>Φ20		50+20-10
SIZE	DIAMETER(mm)	HZ	CZ	OL	SURFACE			RESISTANCE
		mm	mm	mm	cm²	VOLT	POWER	±20%
SGR16*100*150	16	100	150	250	50	61	940	3.96
SGR16*100*200		100	200	300	50	69	1060	4.49
SGR16*150*150		150	150	300	75	84	1290	5.47
SGR16*150*250		150	250	400	75	99	1520	6.45
SGR16*200*200		200	200	400	100	113	1740	7.34
SGR16*250*200		250	200	450	125	135	2080	8.76
SGR20*100*150	20	100	150	250	62	58	1110	3.03
SGR20*100*250		100	250	350	62	72	1380	3.76
SGR20*150*200		150	200	350	94	87	1670	4.53
SGR20*200*200		200	200	400	125	109	2090	5.68
SGR20*250*150		250	150	400	157	124	2380	6.46
SGR20*250*250		250	250	500	157	138	2650	7.19
SGR20*300*250		300	250	550	188	160	3070	8.34
SGR25*150*200	25	150	200	350	117	87	2000	3.78
SGR25*200*200		200	200	400	157	110	2530	4.78
SGR25*200*300		200	300	500	157	121	2780	5.27
SGR25*300*300		300	300	600	235	167	3840	7.26
SGR25*300*400		300	400	700	235	179	4120	7.78
SGR25*350*300		350	300	650	274	191	4390	8.31
SGR25*400*300		400	300	700	314	214	4920	9.31
SGR30*200*200	30	200	200	400	188	190	2790	2.9
SGR30*250*200		250	200	450	235	111	3440	3.58
SGR30*300*300		300	300	600	282	132	4090	4.26
SGR30*350*350		350	350	700	329	153	4740	4.94
SGR30*400*400		400	400	800	376	174	5390	5.62
SGR30*450*350		450	350	800	424	194	6010	6.26
SGR30*500*300		500	300	800	471	214	6630	6.91
SGR35*200*200	35	200	200	400	219	89	3260	2.43
SGR35*250*200		250	200	450	274	109	3990	2.98
SGR35*300*300		300	300	600	329	130	4760	3.55
SGR35*400*300		400	300	700	439	171	6260	4.67
SGR35*450*350		450	350	800	494	191	6990	5.22
SGR35*500*300		500	300	800	549	211	7720	5.77
SGR40*200*200	40	200	200	400	251	86	3660	2.02
SGR40*250*200		250	200	450	314	106	4510	2.49
SGR40*300*300		300	300	600	376	127	5400	2.99
SGR40*350*300		350	300	650	439	147	6250	3.46
SGR40*400*300		400	300	700	502	167	7100	3.93
SGR40*400*400		400	400	800	502	167	7100	3.93
SGR40*450*300		450	300	750	565	186	7910	4.37
SGR40*450*350		450	350	800	565	187	7950	4.4
SGR40*500*300		500	300	800	628	206	8760	4.84

The Double Spiral Silicon Carbide Heating Element can be used in a variety of applications.

SGR elements are used in a wide variety of furnace applications, from small laboratory furnaces to large industrial heating processes, in different atmospheres and temperature ranges.

Used in dental furnaces

Most zirconia materials require sintering at high temperatures of 1450–1550°C for two hours or more. As a common electric heating element in zirconia sintering furnaces, silicon carbide rods are ideal for this process. They can be used to heat zirconia in an open crucible without a cover, which eliminates the need for a double atmosphere inside the crucible and enhances the accuracy of sintering. This approach avoids the complications of a second heating environment. Additionally, silicon carbide rods can cool rapidly without damaging the components.

Installation and Operation of SGR type Double Spiral Silicon Carbide Heating Element

Two types of installation

SGR type SiC Heater Element can be mounted vertically or horizontally.

Mounting Horizontally

When mounting the SGR type SiC Heater Element horizontally, the hot end does not need to be supported, the slot in the terminal end should not come in contact with the insulation in the wall of the furnace or kiln.

This is most easily accomplished by placing the slot in a horizontal position. The terminal holes should also be 10% larger than the diameter of the element.

Extreme caution should be used when mounting to ensure that the SGR type SiC heating elements are not placed in tension.

There should be adequate freedom to allow for the furnace and SGR type SiC heating elements to expand and contract independently.

Location of installation

SGR type SiC heater elements should have their heating sections centered in the furnace chamber so that no portion of the heating section extends into the furnace wall.

A conical or truncated cone shaped recess 1/2 inch (13mm) deep is sometimes located on the interior wall where the SGR type SiC heating elements passes through. This allows the hot zone to radiate properly and helps maintain a uniform emperature in the kiln.

Recommended SGR type Double Spiral Silicon Carbide Heating Element spacing

X = 2 × element diameter is the minimum,

1.5 × element diameter is the absolute minimum and requires a reduced element surface watt loading.

Z = S ÷ 1.41 minimum for stationary loads

Z = S ÷ 1.73 minimum for moving loads

S = 2 × element diameters minimum

X – distance from the centerline of element to any reflecting surface, such as a refractory wall or centerline of an adjacent element

The advantages of SGR type Double Spiral Silicon Carbide Heating Element

Double spiral SiC Heater Element has a characteristic of current heating, heating speed fast, uniform temperature field; The normal temperature in oxidation atmosphere can reach 1450℃, and the continuous use can reach 2000 hours.

And it has good chemical stability, high temperature resistance, oxidation resistance, corrosion resistance.

The conductive end of the cold end of the double spiral silicon carbon rod is evenly sprayed with aluminum layer, which greatly improves the conductive property.

Connection method for SGR type Double Spiral Silicon Carbide Heating Element

Double spiral SiC Heater Element is suitable for wiring on one side of electric furnace. The diameter and length of cold and hot end of equal diameter silicon carbide rod can be selected according to the requirements of electric furnace structure, temperature and power.

The single ended connection of SGR type sic heater element makes them ideally suited to various applications where standard elements cannot conveniently be used, such as where access would be difficult, or in any case where single ended connections are essential.

Production process

In the production process of double spiral silicon carbon rod, special technology is arranged to strengthen and transform the rod body, so that different specific production materials and layer technology are added to the element body according to the different use environment (or acid or alkaline) to improve the purpose of resistance and service life.

Video

SGR type Double Spiral Silicon Carbide Heating Element and accessories

The elements allow great freedom in furnace design which, combined with simple installation and long operating life.

This makes them the preferred choice in many applications including: Glass, ceramics, electronics and metal industries and also for research and development.

When you inquiry, Please inform us

• Outer diameter (OD)
• Length of Hot zone (HZ)
• Cold end length(CZ)
• Length of Overall (OL)
• Vottage and Wattage
• Quantity