Ceramic Heating Elements "PYROMAX SUPER"

Features

• 

  ①Long Service Life & Economical

  The strong surface protective film adequately protects the interior and provides a long service life.

• 

  ②Small Resistance Change

  The change in resistance due to oxidation is small because the protective surface film does not grow beyond what is necessary.

• 

  ③Excellent Deformation Resistance

  Excellent creep resistance at high temperatures.

Characteristics

The maximum operating temperature of PYROMAX SUPER in the air is 1,800℃(1,700℃ in a furnace atmosphere). In an inert atmosphere such as nitrogen or argon, or a reducing atmosphere such as hydrogen, it is difficult to form a protective film on the surface, therefore the temperature must be lowered accordingly.
Table 1 shows the approximate maximum heating element temperatures (reference values) in several common atmospheres. Physical properties are also shown in Table 2.

• Figure1　
  Operating Temperature in Different Atmospheres

  Operating Atmosphere	Element Maximum Temperature （℃）	Furnace Operating Temperature （℃）
  Air	1,800	1,700
  Nitrogen	1,700	1,600
  Argon	1,700	1,600
  Dry Hydrogen	1,400	1,300

• Figure2　Physical Characteristics

  Melting point	2,100℃
  Specific gravity	5.5
  Vickers hardness	HV 1250
  Bending strength (RT)	350MPa
  Thermal conductivity (RT to 400℃)	30W / m・K
  Specific heat capacity (RT)	400J / kg・K
  Fracture toughness	3.0MPa・√m
  Specific resistance (RT to 1,800℃)	0.3×10-6～ 3.6 ×10-6 Ω・m

Temperature and Specific Resistance

The specific resistance of PYROMAX SUPER increases rapidly with temperature and changes almost linearly. (The resistance at 1,800℃ is approximately 12 times that at 20℃.) This resistance characteristic provides excellent controllability when the temperature rises, allowing the preset temperature to be reached more quickly.

Product Standards

2-Shank Type Standard Dimensions

Basically, the size and length are determined by the design of the electric heater.
Therefore, the furnace is manufactured according to the specified size and length.

Dimension-Specified Area When Ordering

• ①Terminal Length ＝ Au
• ②Heater Length ＝ Ae
• ③Distance between shanks ＝ s
• ④Terminal Diameter ＝ D Φ
• ⑤Heater Diameter ＝ d Φ

Standard Dimension Table（mm）

Size Type (Nominal Diameter)	Terminal Diameter （Dφ）	Terminal Length （Au）	Heater Diameter （dφ）	Heater Length （Ae）	Distance Between Shanks （S）
3/6	6	50 ~ 400	3	50 ~ 630	25
4/9	9	50 ~ 400	4	50 ~ 630	25・40
6/12	12	125 ~ 630	6	125 ~ 600 ※	40・45 50・60
9/18	18	125 ~ 450	9	125 ~ 600 ※	50・60

※We can also accommodate dimensions other than those in the table.

4-Shank Type Standard Dimensions

The size and length are determined by the design of the electric heater.
Therefore, the furnace is manufactured according to the specified size and length.

Dimension-Specified Area When Ordering

• ①Terminal Length ＝ Au
• ②Heater Length ＝ Ae
• ③Distance between shanks ＝ s
• ④Terminal Diameter ＝ D Φ
• ⑤Heater Diameter ＝ d Φ
• Note）Under Normal Circumstances S ＝ S1 ＋ S2 ＋ S3

Standard Dimension Table（mm）

Size Type (Nominal Diameter)	Terminal Diameter （Dφ）	Terminal Length （Au）	Heater Diameter （dφ）	Heater Length （Ae）	Distance Between Shanks （S）	Lead Length (if a lead is attached)
6/12	12	400 ~ 630	6	140 ~ 600 ※	40・45・50・60	240
9/18	18	450 ~ 610	9	180 ~ 600 ※	50・60	240

※Please consult with us when the length exceeds 600 mm.

Bent Shank Type Standard Dimensions

The size and length are determined by the design of the electric heater. Therefore, the furnace is manufactured according to the specified size and length.

Dimension-Specified Area When Ordering

• ①Terminal Length ＝ Au
• ②Heater Length ＝ Ae
• ③Distance between shanks ＝ s
• ④Terminal Diameter ＝ D Φ
• ⑤Heater Diameter ＝ d Φ
• Note）When ordering, please specify two of the following dimensions: ℓ, k, and m.

Standard Dimension Table（mm）

Size Type (Nominal Diameter)	Shared by A & B					A				B
	Terminal Diameter （Dφ）	Terminal Length （Au）	Heater Diameter （dφ）	Heater Length （Ae）	Distance Between Shanks （S）	k90°	m	n	r	h
3/6	6	50 ~ 280	3	50 ~ 630	25	19	32 ~	45 ~	12	12
4/9	9	50 ~ 280	4	50 ~ 800	25	19	32 ~	45 ~	12	12
6/12	12	125 ~ 630	6	125 ~ 600 ※	40・45 50・60	47	(60)	(90)	(30)	(15)
9/18	18	125 ~ 450	9	125 ~ 600 ※	50・60	71	(90)	(135)	(45)	(20)

※Please consult with us when the length exceeds 600 mm.