Continental Trade Sp. z o. o.

Technical glass

Synthetic quartz GE219 & GE254 tubes

Products withdrawn from the offer !

Products made of quartz glass GE-xxx are no longer in our offer !

Instead, we offer products made of quartz glass JGS1, JGS2 and JGS3. The properties of these types of glasses are shown here.

The following information is presented only to archival purposes and are not the subject of our offer.

Archival information (outdated)

GE 219
Also known as ‘Ozone-Free' or "Germicidal", GE219 doped quartz transmits UV-A and UV-B, while blocking the deep, high energy wavelengths that cause ozone generation. GE219 efficiently transmits the 254nm mercury emission and is ideal for disinfecting applications and many other UV treatments.


GE 254
GE254 doped quartz, virtually blocks all UV-B and UV-C radiation. The transmittance cut off point lies between 350 and 400nm, making GE254 ideal for lamps requiring maximum visible transmittance, with nearly complete UV protection. Applications include where UV exposure to people or property is undesirable and include some quartz halogen and metal halide lamps as well as other UV sources.
Both material types are also supplied with a lower hydroxyl content of <1ppm (OH--), for Metal Halide lamps and applications where the quartz must be devoid of hydroxyl and dissolved gases.

Typical dimensions and tolerances

Typical dimensions

I.D.
[mm]
O.D.
[mm]
  I.D.
[mm]
O.D.
[mm]
  I.D.
[mm]
O.D.
[mm]
  I.D.
[mm]
O.D.
[mm]
1,00 2,00   7,00 9,00   15,00 17,00   26,00 29,00
3,00   9,60   18,00   30,00
4,00   10,40   20,00   27,00 30,00
5,00   7,75 9,75   16,00 18,00   28,00 31,00
6,00   8,00 10,00   19,00   32,00
2,00 3,00   11,00   20,00   30,00 33,00
4,00   12,00   17,00 19,00   34,00
5,00   9,00 11,00   20,00   36,00
6,00   11,80   18,00 20,00   32,00 35,00
8,00   13,00   20,50   38,00
2,30 6,30   15,00   21,00   34,00 37,00
3,00 4,00   10,00 12,00   21,60   38,00
5,00   13,00   19,00 22,00   35,00 38,00
6,00   14,00   25,00   40,00
8,00   10,50 12,75   20,00 22,00   36,00 40,00
3,60 8,00   13,00   22,50   37,00 40,00
4,00 6,00   15,80   23,00   38,10 42,10
6,35   11,00 13,00   24,00   40,00 43,00
8,00   15,00   24,50   44,00
4,10 10,00   12,00 14,00   25,00   45,00
4,50 9,10   15,00   22,00 24,00   46,00
5,00 7,00   16,00   24,50   42,00 45,00
7,25   13,00 15,00   25,00   46,00
8,00   15,80   25,80   44,00 48,00
9,00   16,00   24,00 26,00   45,00 48,00
10,00   16,20   28,00   46,00 50,00
6,00 8,00   13,50 19,00   30,00   47,00 50,00
10,00   14,00 16,00   25,00 27,00   48,00 52,00
12,00   18,00   28,00   50,00 54,00
13,00   19,00   28,80   55,00

Descriptions: 

  • I.D. - inner diameter
  • O.D. - outer diameter

Tolerances

Outer diameter
[mm]
Diameter
tolerance
Length
[mm]
Length
tolerance
[+/-]
Wall
thickness
[mm]
Thickness
tolerance
3 - 6 2% up to 2540 +19 / -0 <= 2.0 10%
> 6 - 20 2% up to 3060 +19 / -0 > 2.0 8%
> 20 - 40 1% up to 3060 +75/ -0       
> 40 - 50 1% up to 3060 +75 / -0
3 - 50   Cutting length up to +/- 0.5

If you cannot find the size contact us.

Typical physical properties
QUARTZ TYPEGE214GE219GE254
Density [g/cm3] 2,2 2,21 2,21
Thermal Expansion Coefficient [cm/cm °C] 5,5 x 10-7 5,9 x 10-7 6,7 x 10-7
Softening Point [°C] 1683 1660 1615
Annealing Point [°C] 1215 1204 1163
Strain Point [°C] 1120 1106 1066
Index of Refraction 1,4585 1,456 1,460
Specific Heat [J/kg °K]  (@ 0-50 °C) 670 700 690
Compressive Strength [psi] >160.000 13.660 8.090
Young's Modulus [psi] 10,5 x 106 10,91 x 106  10,26 x 106
Electrical Resistivity [Ohm cm]  (@ 350°C) 7 x 109 2,5 x 1010 5 x 1010
Dielectric Constant (@ 1MHz) 3,75 5,8 6
Typical trace elements composition

Chemical composition (ppm by weight, analysis via direct spectrometer reading)

TypAlAsBCaCdCrCuFeKLiMgMnNaNiPSbTiZrOH
GE219 14 <0.01 <0.2 0.4 <0.01 0.05 <0.05 0.2 0.6 0.6 0.1 <0.05 0.7 <0.1 <0.2 <0.003 100 0.8 <5
GE219A 14 <0.01 <0.2 0.4 <0.01 0.05 <0.05 0.2 0.6 0.6 0.1 <0.05 0.7 <0.1 <0.2 <0.003 100 0.8 <1
GE254 14 <0.01 <0.2 0.4 <0.01 0.05 <0.05 0.2 0.6 0.6 0.1 <0.05 0.7 <0.1 <0.2 <0.003 500 0.8 <5
GE254A 14 <0.01 <0.2 0.4 <0.01 0.05 <0.05 0.2 0.6 0.6 0.1 <0.05 0.7 <0.1 <0.2 <0.003 500 0.8 <1

 

Average transmittance

Average transmittance (based on 1mm thickness, includes surface reflection)


While every attempt has been made to verify the source of the information, no responsibility is accepted for accuracy of data.

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