SELFA GE S.A. Cartrige heating elements

	GP	GPN
Diameter of the heater	Standard: Ø6.5 Ø8.0 Ø10.0 Ø12.5 Ø16 Ø20 [mm] Inches: 1/4" 3/8" 1/2" 5/8" 3/4" On request: from Ø6.0 to Ø50 [mm]
Diameter tolerance	-0.02 [mm] -0.08 [mm]	+0.2 [mm]
Range of length	20 - 1000 [mm]
Length tolerance	± 1,5 %
Voltage	12 - 380 [V]
Surface load	35 W/cm²	5 W/cm²
Permissible max. temperature	500 °C (on the sheath)
Power	50 - 3000 W
Power tolerance	+5 [%] -10
Material of the tube	Steel Cr-Ni 1H18N9T
Min. lengths of inactive parts	- from the bottom: 4 [mm] - from the insulator: 6 [mm]

Type GPF

Type GPF cartridge heating elements are manufactured from the highest quality materials and meet the most extensive design and production criteria assuring the highest quality for the most advanced applications. Specific characteristics of their structure allow obtaining very high values of surface load and high temperature of operation.

GPF
Diameter of the heater	Metrical: Ø6.5 Ø8.0 Ø10.0 Ø12.5 Ø16 Ø20 [mm] Inches: 1/8" 1/4" 3/8" 1/2" 5/8" 3/4" 1"
Diameter tolerance	-0.02 [mm] -0.08 [mm]
Lengths	to 2300 [mm]
Length tolerance	± 2 % (min. 2,4mm)
Voltage	12 - 480 [V]
Surface load	to 62 W/cm²
Permissible max. temperature	870 °C (on the sheath)
Power	5000 W
Power tolerance	+5 [%] -10
Material of the tube	Incoloy 800
Min. lengths of inactive parts	- from the bottom: 6 [mm] - from the insulator: 6 [mm]

Type GPT

These kinds of heaters with built-in thermoelement type Fe-Ko are applicable mainly in apparatus where because of limited space it is impossible to use a separate control element.

All the basic technical data, tolerances and boundary values are identical as for type GP heaters.

Thermoelement:

type Fe-Ko electrically insulated from the sheath
positive end - iron
negative end - constantan

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