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Bottle Septa

The applied septum is crucial for optimal analysis. Primarily, the septum should be inert to the sample solution and at the same time protect it from outside contamination as well as from possible evaporation. Almost all sealing discs are coated on one side with PTFE (Polytetrafluoroethylene), which has a high chemical resistance and forms an inert barrier between the sample and the carrier material of the septum. The carrier materials have different physical and chemical properties, e.g. temperature resistance, reclosing properties, purity, hardness, thickness, etc. We offer bottle septa with a diameter of 8mm to 22mm. Select the needed size in the drop down menu on the left. Choose from septa by Agilent Technologies and our home brand Altmann Analytik. These septa are a low cost and high quality alternative.

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Bottle Septa

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  1. Septa, ND13, 12 mm diameter, PTFE, 0,25 mm, 10 x 100 pc
    Altmann Analytik

    Septa, ND13, 12 mm diameter, PTFE, 0,25 mm, 10 x 100 pc

    $30.03
    sku: AAV23131279
  2. Septa red PTFE/White Sil., 12 mm diameter,, 100 St.
    Agilent Technologies

    Septa red PTFE/White Sil., 12 mm diameter,, 100 St.

    $28.59
    sku: AG5183-4460
  3. Univ. HT Inject. Port septa, 11 mm diameter, transp., 25/PAK
    Altmann Analytik

    Univ. HT Inject. Port septa, 11 mm diameter, transp., 25/PAK

    $44.57
    sku: AAV22292049
  4. Septa, 10 mm diameter, natural rubber red-orange/TEF transparent, 1000/pck
    Altmann Analytik

    Septa, 10 mm diameter, natural rubber red-orange/TEF transparent, 1000/pck

    $122.81
    sku: AAV20132370
  5. Septa, 10 mm diameter, silicone white/PTFE red, 1,3 mm, 1000/pck
    Altmann Analytik

    Septa, 10 mm diameter, silicone white/PTFE red, 1,3 mm, 1000/pck

    $250.55
    sku: AAV20132371
  6. Septa for short thread screw cap, ND9, silicone white/PTFE red, 1000/pck
    Altmann Analytik

    Septa for short thread screw cap, ND9, silicone white/PTFE red, 1000/pck

    $240.35
    sku: AAV20132891
  7. Septa, ND13, 12 mm diameter, silicone creme/PTFE red, 1,5mm, 10 x 100 pc
    Altmann Analytik

    Septa, ND13, 12 mm diameter, silicone creme/PTFE red, 1,5mm, 10 x 100 pc

    $301.58
    sku: AAV23131254
  8. Septa, 12 mm diameter silicone blue transp./PTFE white, 45° shore A, 1,3mm, 10x100/pck
    Altmann Analytik

    Septa, 12 mm diameter silicone blue transp./PTFE white, 45° shore A, 1,3mm, 10x100/pck

    $326.45
    sku: AAV23131719
  9. septa, ND20, 3,0mm, Si blue transp./PTFE white, 10 x 100 pc
    Altmann Analytik

    septa, ND20, 3,0mm, Si blue transp./PTFE white, 10 x 100 pc

    $544.39
    sku: AAV31131252
  10. septa, 22 mm diameter, 1,3mm, 10 x 100 pc
    Altmann Analytik

    septa, 22 mm diameter, 1,3mm, 10 x 100 pc

    $229.79
    sku: AAV33131653
  11. Septa, 22 mm diameter, PTFE, 0,25mm, 10 x 100 pc
    Altmann Analytik

    Septa, 22 mm diameter, PTFE, 0,25mm, 10 x 100 pc

    $247.62
    sku: AAV33132212
  12. Septa, 22 mm diameter, 3,2 mm, EPA-quality, 10 x 100 pc
    Altmann Analytik

    Septa, 22 mm diameter, 3,2 mm, EPA-quality, 10 x 100 pc

    $496.18
    sku: AAV33132219
  13. Septa, 22 mm diameter, butyl red/PTFE grey, 55° shore A, 1,6mm, 10 x 100 pc
    Altmann Analytik

    Septa, 22 mm diameter, butyl red/PTFE grey, 55° shore A, 1,6mm, 10 x 100 pc

    $287.86
    sku: AAV33132501
  14. 20mm Septa, butyl red/PTFE grey, 55° shore A, 1,6mm, 10 x 100 pc
    Altmann Analytik

    20mm Septa, butyl red/PTFE grey, 55° shore A, 1,6mm, 10 x 100 pc

    $285.40
    sku: AAV31132591
  15. PK100 PTFE/SILICONE SEPTA FOR 40ML VIAL
    Supelco

    PK100 PTFE/SILICONE SEPTA FOR 40ML VIAL

    $142.50
    sku: SU27188-U
  16. Septa, ND8, 8 mm diameter, silicone white/PTFE red, 45° shore A, 1,3 mm, 1000/pck
    Altmann Analytik

    Septa, ND8, 8 mm diameter, silicone white/PTFE red, 45° shore A, 1,3 mm, 1000/pck

    $218.29
    sku: AAV19131214
  17. Septa, ND8, 8 mm diameter, PTFE, 53° shore D, 0,25 mm, 1000/pck
    Altmann Analytik

    Septa, ND8, 8 mm diameter, PTFE, 53° shore D, 0,25 mm, 1000/pck

    $29.80
    sku: AAV19131288
  18. Septa, ND8, 8 mm diameter, natural rubber red-orange/TEF transp., 60° shore A, 1,0 mm, 1000/pck
    Altmann Analytik

    Septa, ND8, 8 mm diameter, natural rubber red-orange/TEF transp., 60° shore A, 1,0 mm, 1000/pck

    $59.59
    sku: AAV19131343
  19. Septa, ND8, 8 mm diameter, red rubber/PTFE beige, 45° shore A, 1,0 mm, 10x100/pck
    Altmann Analytik

    Septa, ND8, 8 mm diameter, red rubber/PTFE beige, 45° shore A, 1,0 mm, 10x100/pck

    $86.33
    sku: AAV19133077
  20. Septa, ND13, 12 mm diameter, natural rubber red-orange/TEF transp., 1,3mm, 10 x 100 pc
    Altmann Analytik

    Septa, ND13, 12 mm diameter, natural rubber red-orange/TEF transp., 1,3mm, 10 x 100 pc

    $76.60
    sku: AAV23131334
  21. Septa, ND13, 12 mm diameter, silicone white/PTFE blue, 55° shore A, 1,5mm, cross slit, 10 x 100 pc
    Altmann Analytik

    Septa, ND13, 12 mm diameter, silicone white/PTFE blue, 55° shore A, 1,5mm, cross slit, 10 x 100 pc

    $559.99
    sku: AAV23131433
  22. Septa, 16 mm diameter, 1,3mm, 10 x 100 pc
    Altmann Analytik

    Septa, 16 mm diameter, 1,3mm, 10 x 100 pc

    $189.44
    sku: AAV27131764
  23. Septa, 16 mm diameter, butyl red/PTFE grey, 55° shore A, 1,6mm, 10 x 100 pc
    Altmann Analytik

    Septa, 16 mm diameter, butyl red/PTFE grey, 55° shore A, 1,6mm, 10 x 100 pc

    $194.02
    sku: AAV27132495
  24. Septa, 17 mm diameter, silicone white/PTFE red, 1,3mm, 10 x 100 pc
    Altmann Analytik

    Septa, 17 mm diameter, silicone white/PTFE red, 1,3mm, 10 x 100 pc

    $582.39
    sku: AAV28132691
  25. Septa, 20 mm diameter, silicone white/PTFE beige, 45° shore A, 3,2mm, 10 x 100 pc
    Altmann Analytik

    Septa, 20 mm diameter, silicone white/PTFE beige, 45° shore A, 3,2mm, 10 x 100 pc

    $544.39
    sku: AAV31131749
  26. Septa, PTFE 15mil for 20-400 cap, 100/pk
    Waters

    Septa, PTFE 15mil for 20-400 cap, 100/pk

    $13.33
    sku: WT186001422
  27. Septa for short thread screw cap, ND9, red rubber/PTFE beige, 1000/pck
    Altmann Analytik

    Septa for short thread screw cap, ND9, red rubber/PTFE beige, 1000/pck

    $132.78
    sku: AAV20132929
  28. PK100 20 mm PTFE/SILICONE SEPTA, .030IN T
    Supelco

    PK100 20 mm PTFE/SILICONE SEPTA, .030IN T

    $105.38
    sku: SU27539
  29. PK100 PTFE/SILICONE SEPTA FOR 4ML VIAL
    Supelco

    PK100 PTFE/SILICONE SEPTA FOR 4ML VIAL

    $80.25
    sku: SU27144
  30. septa, PTFE/natural rubber, for 4 mL Vials, 144 pcs.
    Agilent Technologies

    septa, PTFE/natural rubber, for 4 mL Vials, 144 pcs.

    $44.00
    sku: AG9301-1031
  31. VOA Vial Septum Replacement, 24 mm Durchmesser, Teflon Faced 0.125 Silicone Septum, 100/PAK
    Restek

    VOA Vial Septum Replacement, 24 mm Durchmesser, Teflon Faced 0.125 Silicone Septum, 100/PAK

    $51.23
    sku: RE24694
  32. septa for screw top caps, certified, PTFE/White silicone/red PTFE
    Agilent Technologies

    septa for screw top caps, certified, PTFE/White silicone/red PTFE

    $37.41
    sku: AG5182-0729
  33. Univ. HT Inject. Port septa, 9,5 mm diameter, transp., 25/PAK
    Altmann Analytik

    Univ. HT Inject. Port septa, 9,5 mm diameter, transp., 25/PAK

    $44.57
    sku: AAV20292047
  34. Univ. HT Inject. Port septa, 10 mm diameter, transp., 25/PAK
    Altmann Analytik

    Univ. HT Inject. Port septa, 10 mm diameter, transp., 25/PAK

    $44.57
    sku: AAV21292048
  35. Univ. HT Inject. Port septa, 12,5 mm diameter, transp., 25/PAK
    Altmann Analytik

    Univ. HT Inject. Port septa, 12,5 mm diameter, transp., 25/PAK

    $44.57
    sku: AAV23292050
  36. Universal HT Injection Port septa, 17 mm diameter, transp., 25/PAK
    Altmann Analytik

    Universal HT Injection Port septa, 17 mm diameter, transp., 25/PAK

    $44.57
    sku: AAV28292051
  37. Septa, 8 mm diameter, Viton 1A schw., 1,5 mm 1000/pck
    Altmann Analytik

    Septa, 8 mm diameter, Viton 1A schw., 1,5 mm 1000/pck

    $464.51
    sku: AAV19131331
  38. Septa, 8 mm diameter, silicone bl. transp./PTFE white, 1,3 mm, 1000/pck
    Altmann Analytik

    Septa, 8 mm diameter, silicone bl. transp./PTFE white, 1,3 mm, 1000/pck

    $229.09
    sku: AAV19131674
  39. Septa, 8 mm diameter, Viton 1A black, 1,0 mm, 1000/pck
    Altmann Analytik

    Septa, 8 mm diameter, Viton 1A black, 1,0 mm, 1000/pck

    $464.51
    sku: AAV19131885
  40. Septa, 10 mm diameter, silicone white/PTFE beige, 1,5mm, 1000/pck
    Altmann Analytik

    Septa, 10 mm diameter, silicone white/PTFE beige, 1,5mm, 1000/pck

    $250.55
    sku: AAV20131834
  41. Septa for short thread screw cap, ND9, PTFE, 1000/pck
    Altmann Analytik

    Septa for short thread screw cap, ND9, PTFE, 1000/pck

    $39.53
    sku: AAV20132091
  42. Septa, 10 mm diameter, PTFE red/silicone white/PTFE red, 1,0 mm, 1000/pck
    Altmann Analytik

    Septa, 10 mm diameter, PTFE red/silicone white/PTFE red, 1,0 mm, 1000/pck

    $358.00
    sku: AAV20132372
  43. Septa, 10 mm diameter, silicone white/PTFE blue, slit, 1,5 mm, 1000/pck
    Altmann Analytik

    Septa, 10 mm diameter, silicone white/PTFE blue, slit, 1,5 mm, 1000/pck

    $472.95
    sku: AAV20132438
  44. Septa for short thread screw cap, ND9, natural rubber red-orange/TEF transp., 1000/pck
    Altmann Analytik

    Septa for short thread screw cap, ND9, natural rubber red-orange/TEF transp., 1000/pck

    $120.12
    sku: AAV20132890
  45. Septa for short thread screw cap, ND9, PTFE red/silicone white/PTFE red, 1000/pck
    Altmann Analytik

    Septa for short thread screw cap, ND9, PTFE red/silicone white/PTFE red, 1000/pck

    $319.64
    sku: AAV20132892
  46. Septa for short thread screw cap, ND9, silicone white/PTFE blue, 1000/pck
    Altmann Analytik

    Septa for short thread screw cap, ND9, silicone white/PTFE blue, 1000/pck

    $396.36
    sku: AAV20133053
  47. Septa, 10 mm diameter, PTFE virginal, 0,25mm 1000/pck
    Altmann Analytik

    Septa, 10 mm diameter, PTFE virginal, 0,25mm 1000/pck

    $41.06
    sku: AAV21131757
  48. Septa, 11 mm diameter, Viton 1A black, 1,5 mm 1000/pck
    Altmann Analytik

    Septa, 11 mm diameter, Viton 1A black, 1,5 mm 1000/pck

    $484.81
    sku: AAV22131332
  49. Septa, 17 mm diameter, butyl red/PTFE grey, 1,6 mm, 10 x 100 pc
    Altmann Analytik

    Septa, 17 mm diameter, butyl red/PTFE grey, 1,6 mm, 10 x 100 pc

    $253.84
    sku: AAV28132526
  50. Septa, 17 mm diameter, silicone blue transp./PTFE white, 1,3mm, 10 x 100 pc
    Altmann Analytik

    Septa, 17 mm diameter, silicone blue transp./PTFE white, 1,3mm, 10 x 100 pc

    $548.26
    sku: AAV28132528
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Properties and applications of septa made of TEF, PTFE, butyl, silicone etc.

Naturkautschuk /TEF
  Application: HPLC/GC

• Standard quality for HPLC
• Good reclosure properties for multiple injections
• Relatively inexpensive
• Temperature resistant from -40 ° C to 120 ° C
• Not very clean as a natural product
• Punching discs (punched from sheet / roll material
RedRubber / PTFE (synthetic rubber)
  Application: HPLC/GC

• NEW standard quality for HPLC and GC
• Synthetic rubber, cleaner and softer than natural rubber
• Relatively inexpensive
• Temperature resistant from -40 ° C to 110 ° C
• Punching discs (punched from sheet / roll material)
Butyl (septa / stopper)
  Application: Headspace

• In the absence of a PTFE coating, only for uncritical analyzes
• Butyl as a synthetic rubber cleaner than natural rubber
• Very cheap as there is no PTFE coating
• Application examples: breweries, blood alcohol analyzes
• Original Butyl stopper for PerkinElmer
• Forming discs (vulcanized and formed in a mold)

    
Pharma-Fix Septum Butyl / PTFE
  Application: GC/HPLC/Headspace

• Specialty: Pharma-Fix washer only centric PTFE-coated butyl disc; The elastic butyl lying on the glass edge achieves a significantly better seal than the slippery surface of a completely laminated sealing disc
• Butyl as a synthetic rubber cleaner than natural rubber
• Relatively inexpensive compared to silicone
• Temperature resistant from -40 ° C to 120 ° C
• Synthetic rubber has poorer reclosure properties than natural rubber
• Forming discs (vulcanized and formed in a mold)
(PTFE /) silicone / PTFE
  Application: GC/HPLC/Headspace

• Silicone is the purest synthetic elastomer and is therefore used for critical analyzes
• Temperature resistant from -60 ° C to 200 ° C
• Improved reclosure properties than NK / TEF as a synthetic elastomer
• (segmented) septa in HPLC as penetration aids for thick / blunt needles and for producing a valve effect in the case of multiple injections
• Specialty: PTFE-coated silicone washers on both sides for low particle formation
• punching discs (punched from sheet / roll material)
Silicon / aluminum foil
  Application: Headspace

• All chemical and physical properties, such as silicone / PTFE
• However, slightly higher temperature resistance from -60 ° C to 220 ° C
• Frequently on PerkinElmer devices
• More expensive than PTFE-coated septa
Pure PTFE septa
  Application: HPLC

• Very inert, therefore also as a coating on most other sealing discs
• No elastomer
-> No sealing
-> No reclosing properties
• Do not press-fit into caps; Are therefore often only sold unassembled
• Very cheap
• Only for very uncritical applications
• Are often used on VWR (Merck) / Hitachi and Waters instruments

Durometer (hardness of the septum)


Durometer is the hardness of a septum, expressed in ° shore. The higher the "shore" number, the harder the septum, the lower the "shore" number, the softer the septum. The softest sealing disc is 45 ° shore A and the hardest 70 ° shore A is hard. In addition to the thickness of the disc, the hardness is an important indicator, which septum is suitable for the penetration of a certain needles (sensitive needles, thin or thick needles, pointed or blunt needles, etc.).

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