GC Septa

We supply a good selection of high quality septa for your laboratory applications. We stock septa by Agilent Technologies, SGE and other leading manufacturers. High-quality and affordable alternatives are available  with products of our own brand Altmann Analytik. Click here for GC Ferrules. Questions about our products? Our  expert team will advise you on all questions.

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Product Image of GC Septa, 212°C, PTFE/Silicone Rubber, ø 11 mm, 3.18 mm thick, 12 pc/PAK
GC Septa, 212°C, PTFE/Silicone Rubber, ø 11 mm, 3.18 mm thick, 12 pc/PAK
Item number: HT75807
Brand: Hamilton

In stock

$38.80
Product Image of Septa PTFE/Silicone 8mm Pre, 100pc/PAK
Septa PTFE/Silicone 8mm Pre, 100pc/PAK
Item number: WTWAT058876
Brand: Waters
$49.00
Product Image of Septa PTFE/Silicone, 100pc/PAK
Septa PTFE/Silicone, 100pc/PAK
Item number: WTWAT058874
Brand: Waters
$62.00
Product Image of High Temperature GC Septum, 9,5 mm diameter, 25/pk
High Temperature GC Septum, 9,5 mm diameter, 25/pk
Item number: TFHT-9.5
Brand: Thermo Fisher Scientific
$102.64
Product Image of High Temperature GC Septum, 11 mm diameter, 25/pk
High Temperature GC Septum, 11 mm diameter, 25/pk
Item number: TFHT-11
Brand: Thermo Fisher Scientific
$102.64
Product Image of Economy GC Septum, 11 mm diameter, 25/pk
Economy GC Septum, 11 mm diameter, 25/pk
Item number: TFECO-11
Brand: Thermo Fisher Scientific
$43.34
Product Image of Septum, BTO, 9 mm diameter, 50/PAK
Septum, BTO, 9 mm diameter, 50/PAK
Item number: TF31303240
Brand: Thermo Fisher Scientific
$139.96
Product Image of SHIMADZU Plug GC septa (ultra pure), red, 25 pc/PAK
SHIMADZU Plug GC septa (ultra pure), red, 25 pc/PAK
Item number: AAV070186
Brand: Altmann Analytik
$50.40
Product Image of 9.5 mm high performance GC septum (ultra pure), red, 25 pc/PAK
9.5 mm high performance GC septum (ultra pure), red, 25 pc/PAK
Item number: AAV090182
Brand: Altmann Analytik
$2.04
Product Image of 17 mm High performance GC Septum (Ultra pure), red, 25 pc/PAK
17 mm High performance GC Septum (Ultra pure), red, 25 pc/PAK
Item number: AAV170185
Brand: Altmann Analytik
$258.67
Product Image of 11 mm high performance GC septum (ultra pure), red, 25 pc/PAK
11 mm high performance GC septum (ultra pure), red, 25 pc/PAK
Item number: AAV110184
Brand: Altmann Analytik
$2.04
Product Image of Advance Green-septa n.kleb. 11 mm diameter, 400pc/PAK
Advance Green-septa n.kleb. 11 mm diameter, 400pc/PAK
Item number: AG5190-3158
Brand: Agilent Technologies
$744.00
Product Image of Bto Inlet -Septa n. klebend 11 mm diameter, 400 pc/PAK
Bto Inlet -Septa n. klebend 11 mm diameter, 400 pc/PAK
Item number: AG5190-3157
Brand: Agilent Technologies
$773.00
Product Image of Non-Stick Advanced Green Inlet Septa 11mm inlet septa, 50pc/PAK
Non-Stick Advanced Green Inlet Septa 11mm inlet septa, 50pc/PAK
Item number: AG5183-4759
Brand: Agilent Technologies
$107.00
Product Image of Non-Stick BTO Inlet septa 11 mm diameter, 100pc/PAK, for 5880, 5890, 4890, 6850, 6890, 7890 GCs
Non-Stick BTO Inlet septa 11 mm diameter, 100pc/PAK, for 5880, 5890, 4890, 6850, 6890, 7890 GCs
Item number: AG5183-4757-100
Brand: Agilent Technologies
$217.00
Product Image of Septa for screw top caps, certified, PTFE/red silicone, 9mm,  100 pc/PAK
Septa for screw top caps, certified, PTFE/red silicone, 9mm, 100 pc/PAK
Item number: AG5182-0731
Brand: Agilent Technologies
$20.70
Product Image of Shimadzu long life Septum, 25/PAK
Shimadzu long life Septum, 25/PAK
Item number: TFLL-SP
Brand: Thermo Fisher Scientific
$71.62
Product Image of 12mm Septum, RedRubber/PTFE beige, 45° shore A, 1.3mm
12mm Septum, RedRubber/PTFE beige, 45° shore A, 1.3mm
Item number: AAV23133210
Brand: Altmann Analytik
$338.26
Product Image of 13 mm x 0.075
13 mm x 0.075" Tan PTFE/Silicone Septa, 10 x 100 pc/PAK
Item number: USV607550T-13
Brand: JG Finneran
$213.00
Product Image of 10 mm x 0.075
10 mm x 0.075" Red PTFE/Silicone Septa, 10 x 100 pc/PAK
Item number: USV607550-10
Brand: JG Finneran
$190.50
Product Image of 28 mm x 0.100
28 mm x 0.100" PTFE/Silicone Septa, 100 pc/PAK
Item number: USV38-257
Brand: JG Finneran
$96.00
Product Image of 28 mm x 0.060
28 mm x 0.060" PTFE/Silicone Septa, 100 pc/PAK
Item number: USV38-253
Brand: JG Finneran
$67.67
Product Image of 24 mm x 0.125
24 mm x 0.125" PTFE/Silicone Septa, 100 pc/PAK
Item number: USV38-252
Brand: JG Finneran
$40.33
Product Image of 89 mm PTFE Liner, 100 pc/PAK
89 mm PTFE Liner, 100 pc/PAK
Item number: USV38-164
Brand: JG Finneran
$94.83
Product Image of 83 mm PTFE Liner, 100 pc/PAK
83 mm PTFE Liner, 100 pc/PAK
Item number: USV38-162
Brand: JG Finneran
$85.67
Product Image of 70 mm PTFE Liner, 100 pc/PAK
70 mm PTFE Liner, 100 pc/PAK
Item number: USV38-160
Brand: JG Finneran
$66.17
Product Image of 63 mm PTFE Liner, 100 pc/PAK
63 mm PTFE Liner, 100 pc/PAK
Item number: USV38-158
Brand: JG Finneran
$59.67
Product Image of 58 mm PTFE Liner, 100 pc/PAK
58 mm PTFE Liner, 100 pc/PAK
Item number: USV38-156
Brand: JG Finneran
$44.17
Product Image of 53 mm PTFE Liner, 100 pc/PAK
53 mm PTFE Liner, 100 pc/PAK
Item number: USV38-154
Brand: JG Finneran
$40.50
Product Image of 48 mm PTFE Liner, 100 pc/PAK
48 mm PTFE Liner, 100 pc/PAK
Item number: USV38-152
Brand: JG Finneran
$33.83
Product Image of 45 mm PTFE Liner, 100 pc/PAK
45 mm PTFE Liner, 100 pc/PAK
Item number: USV38-150
Brand: JG Finneran
$30.00
Product Image of 43 mm PTFE Liner, 100 pc/PAK
43 mm PTFE Liner, 100 pc/PAK
Item number: USV38-148
Brand: JG Finneran
$27.33
Product Image of 38 mm PTFE Liner, 100 pc/PAK
38 mm PTFE Liner, 100 pc/PAK
Item number: USV38-146
Brand: JG Finneran
$24.67
Product Image of 33 mm PTFE Liner, 100 pc/PAK
33 mm PTFE Liner, 100 pc/PAK
Item number: USV38-144
Brand: JG Finneran
$24.00
Product Image of 28 mm PTFE Liner, 100 pc/PAK
28 mm PTFE Liner, 100 pc/PAK
Item number: USV38-142
Brand: JG Finneran
$19.17
Product Image of 24 mm PTFE Liner, 100 pc/PAK
24 mm PTFE Liner, 100 pc/PAK
Item number: USV38-140
Brand: JG Finneran
$15.33
Product Image of 22 mm PTFE Liner, 100 pc/PAK
22 mm PTFE Liner, 100 pc/PAK
Item number: USV38-138
Brand: JG Finneran
$15.83
Product Image of 20 mm PTFE Liner, 100 pc/PAK
20 mm PTFE Liner, 100 pc/PAK
Item number: USV38-136
Brand: JG Finneran
$14.00
Product Image of 18 mm PTFE Liner, 100 pc/PAK
18 mm PTFE Liner, 100 pc/PAK
Item number: USV38-134
Brand: JG Finneran
$13.83
Product Image of 20 mm x 0.140
20 mm x 0.140" PTFE/Butyl Rubber Pharma-Fix Septa, 100 pc/PAK
Item number: USV614040-20F
Brand: JG Finneran
$83.17
Product Image of 22.5 mm x 0.125
22.5 mm x 0.125" PTFE/Silicone Septa for 24 mm Screw Thread Closure, 10 x 100 pc/PAK
Item number: USV612550-24
Brand: JG Finneran
$363.00
Product Image of 20 mm x 0.125” Thick Natural PTFE/Blue Ultra Low Bleed Silicone Septa for a 20 mm Aluminum Seal, 100 pc/PAK
20 mm x 0.125” Thick Natural PTFE/Blue Ultra Low Bleed Silicone Septa for a 20 mm Aluminum Seal, 100 pc/PAK
Item number: USV612550-20ULB
Brand: JG Finneran
$52.83
Product Image of 22.5 mm x 0.100
22.5 mm x 0.100" PTFE/Silicone Septa for 24 mm Screw Thread Closure, 10 x 100 pc/PAK
Item number: USV610050-24
Brand: JG Finneran
$354.67
Product Image of 20 mm x 0.100
20 mm x 0.100" PTFE/Silicone Septa for 22 mm Screw Thread Closure, 10 x 100 pc/PAK
Item number: USV610050-22
Brand: JG Finneran
$545.17
Product Image of 20 mm x 0.100
20 mm x 0.100" PTFE/Silicone Septa for 20 mm Aluminum Seal, 10 x 100 pc/PAK
Item number: USV610050-20S
Brand: JG Finneran
$360.83
Product Image of 19 mm x 0.100
19 mm x 0.100" PTFE/Silicone Septa for 20 mm Screw Thread Closure, 10 x 100 pc/PAK
Item number: USV610050-20
Brand: JG Finneran
$433.50
Product Image of 13 mm x .100
13 mm x .100" PTFE/Silicone - 10mil PTFE/90mil Silicone Septa for use with Closures, 100 pc/PAK
Item number: USV610050-13
Brand: JG Finneran
$34.50
Product Image of 20 mm x 0.100
20 mm x 0.100" PTFE/Gray Butyl Rubber Septa for 20 mm Aluminum Seal, 10 x 100 pc/PAK
Item number: USV610040G-20
Brand: JG Finneran
$557.83
Product Image of 9.5 mm (3/8
9.5 mm (3/8") Diameter Green High Temp/Extremely Low Bleed GC Septa, 3 mm Thick, Max Temp 350°C, 25 pc/PAK
Item number: USV606XLB-9.5
Brand: JG Finneran
$30.67
Product Image of 17 mm (21/32
17 mm (21/32") Diameter Green High Temp/Extremely Low Bleed GC Septa, 3 mm Thick, Max Temp 350°C, 25 pc/PAK
Item number: USV606XLB-17
Brand: JG Finneran
$34.67

Septa must withstand high chemical and mechanical loads during everyday use in analytics. Especially the application in combination with GC systems requires a high thermal load capacity of the material. A selection of the most common GC septa can be found below.

Material Max. operating temperature Features
BTO 400 °C (300 °C for 17 mm septa)

Low bleeding

Optimized for GC/MS systems

TR-Green 350 °C Long lifetime
Marathon 350 °C

High mechanical resistance

Up to 400 injections per septa lifetime

TR-Blue 200 – 250 °C

Easy to penetrate

Suitable for routine applications

The Inlet septa is an essential part of the sample introduction into a GC system. The purpose of the septa is to create a barrier which is penetrated readily from the nozzle needle and is maintained while the internal pressure is held up without contaminating the analysis.

Septa are available in a number of different materials and sizes (according to the specifications of the system). They are generally made from compositions made of silicone rubber with low bleed and high temperature limit. Therefore Septa are recommended in high/upper temperature limits. Materials for lower temperatures are generally softer, seal better and resist a greater number of injections as higher temperature material. If septa are used above the recommended temperature limit, it may leak into the inlet or decompose. This can lead to sample loss since the hermetic seal is lost, that results in lower column flow and a reduction in the life of the column.

To avoid greater damage and contamination in the entire GC system, the septa should be changed regularly. Thus leaks can be prevented or sample loss reduced in the system. By replacing the septa at reasonable intervals of decomposition of the septa in the system aperture can be counteracted and thus extend the life of the column.

If you can't find a suitable product for your applications, do not hesitate to contact us. Our expert team will advise you independently.