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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. Altmann Analytik

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

    Regular Price: $32.54

    Special Price $30.91

    sku: AAV19131288
  2. Altmann Analytik

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

    Regular Price: $64.93

    Special Price $61.68

    sku: AAV19131343
  3. Altmann Analytik

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

    Regular Price: $133.80

    Special Price $127.11

    sku: AAV20132370
  4. Altmann Analytik

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

    Regular Price: $273.08

    Special Price $259.43

    sku: AAV20132371
  5. Altmann Analytik

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

    Regular Price: $261.98

    Special Price $248.88

    sku: AAV20132891
  6. Altmann Analytik

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

    Regular Price: $144.78

    Special Price $137.54

    sku: AAV20132929
  7. Altmann Analytik

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

    Regular Price: $328.74

    Special Price $312.30

    sku: AAV23131254
  8. Altmann Analytik

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

    Regular Price: $32.67

    Special Price $31.04

    sku: AAV23131279
  9. Altmann Analytik

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

    Regular Price: $83.50

    Special Price $79.33

    sku: AAV23131334
  10. Altmann Analytik

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

    Regular Price: $206.45

    Special Price $196.13

    sku: AAV27131764
  11. Altmann Analytik

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

    Regular Price: $211.42

    Special Price $200.85

    sku: AAV27132495
  12. Altmann Analytik

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

    Regular Price: $593.33

    Special Price $563.66

    sku: AAV31131252
  13. Altmann Analytik

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

    Regular Price: $540.81

    Special Price $513.77

    sku: AAV33132219
  14. Altmann Analytik

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

    Regular Price: $355.80

    Special Price $338.01

    sku: AAV23131719
  15. Altmann Analytik

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

    Regular Price: $593.33

    Special Price $563.66

    sku: AAV31131749
  16. Altmann Analytik

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

    Regular Price: $250.47

    Special Price $237.95

    sku: AAV33131653
  17. Altmann Analytik

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

    Regular Price: $269.95

    Special Price $256.45

    sku: AAV33132212
  18. Altmann Analytik

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

    Regular Price: $313.72

    Special Price $298.03

    sku: AAV33132501
  19. Agilent Technologies

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

    Regular Price: $38.43

    Special Price $36.51

    sku: AG9301-1031
  20. Agilent Technologies

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

    Regular Price: $34.59

    Special Price $32.86

    sku: AG5182-0729
  21. Altmann Analytik

    Septa, ND8, 8 mm diameter, PTFE red/silicone white/PTFE red, 45° shore A, 1,0 mm, 10 x 100 pc

    Regular Price: $346.65

    Special Price $329.32

    sku: AAV19131116
  22. Altmann Analytik

    Septa, ND8, 8 mm diameter, silicone creme/PTFE red, 55° shore A, 1,5 mm, 1000/pck

    Regular Price: $237.93

    Special Price $226.03

    sku: AAV19131120
  23. Altmann Analytik

    Septa, ND8, 8 mm diameter, silicone white/PTFE blue, slit, 55° shore A, 0,9 mm, 1000/pck

    Regular Price: $498.87

    Special Price $473.93

    sku: AAV19131150
  24. Altmann Analytik

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

    Regular Price: $237.93

    Special Price $226.03

    sku: AAV19131214
  25. Altmann Analytik

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

    Regular Price: $506.32

    Special Price $481.00

    sku: AAV19131331
  26. Altmann Analytik

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

    Regular Price: $249.69

    Special Price $237.21

    sku: AAV19131674
  27. Altmann Analytik

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

    Regular Price: $506.32

    Special Price $481.00

    sku: AAV19131885
  28. Altmann Analytik

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

    Regular Price: $94.08

    Special Price $89.38

    sku: AAV19133077
  29. Altmann Analytik

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

    Regular Price: $273.08

    Special Price $259.43

    sku: AAV20131834
  30. Altmann Analytik

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

    Regular Price: $43.12

    Special Price $40.96

    sku: AAV20132091
  31. Altmann Analytik

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

    Regular Price: $390.15

    Special Price $370.64

    sku: AAV20132372
  32. Altmann Analytik

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

    Regular Price: $515.46

    Special Price $489.69

    sku: AAV20132438
  33. Altmann Analytik

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

    Regular Price: $130.92

    Special Price $124.37

    sku: AAV20132890
  34. Altmann Analytik

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

    Regular Price: $348.34

    Special Price $330.92

    sku: AAV20132892
  35. Altmann Analytik

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

    Regular Price: $431.97

    Special Price $410.37

    sku: AAV20133053
  36. Altmann Analytik

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

    Regular Price: $44.68

    Special Price $42.45

    sku: AAV21131757
  37. Altmann Analytik

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

    Regular Price: $528.40

    Special Price $501.98

    sku: AAV22131332
  38. Altmann Analytik

    Septa, 11 mm diameter, 1,5mm, silicone white/PTFE blue, cross slit, 1000/pck

    Regular Price: $567.07

    Special Price $538.72

    sku: AAV22131557
  39. Altmann Analytik

    Septa, 11 mm diameter, red rubber/PTFE beige, 1,0 mm, 1000/pck

    Regular Price: $125.44

    Special Price $119.17

    sku: AAV22132987
  40. Altmann Analytik

    Septa, 16 mm diameter, silicone blue transp./PTFE white, 1,7mm, 10 x 100 pc

    Regular Price: $546.56

    Special Price $519.23

    sku: AAV27131981
  41. Altmann Analytik

    Septa, 17 mm diameter, silicone white/PTFE blue, 1,5 mm, 10 x 100 pc

    Regular Price: $758.89

    Special Price $720.95

    sku: AAV28132429
  42. Altmann Analytik

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

    Regular Price: $276.61

    Special Price $262.78

    sku: AAV28132526
  43. Altmann Analytik

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

    Regular Price: $597.52

    Special Price $567.64

    sku: AAV28132528
  44. Altmann Analytik

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

    Regular Price: $634.76

    Special Price $603.02

    sku: AAV28132691
  45. Altmann Analytik

    Septa, 19 mm diameter, silicone blue transp./PTFE white, 1,3mm, 10 x 100 pc

    Regular Price: $579.61

    Special Price $550.63

    sku: AAV30131804
  46. Altmann Analytik

    Pharma-Fix-Septa, 20 mm diameter, butyl/PTFE, 50° shore A, 3,0mm, 10 x 100 pc

    Regular Price: $461.24

    Special Price $438.18

    sku: AAV31131146
  47. Altmann Analytik

    Septa, ND8, 8 mm diameter, natural rubber red-orange/TEF transp., 60° shore A, 1,3 mm, 10 x 100 pc

    Regular Price: $69.51

    Special Price $66.03

    sku: AAV19131466
  48. Altmann Analytik

    Septa, ND8, 8 mm diameter, butyl red/PTFE grey, 55° shore A, 1,3mm, 10x100/pck

    Regular Price: $100.61

    Special Price $95.58

    sku: AAV19132744
  49. Altmann Analytik

    Septa, ND8, 8 mm diameter, PTFE grey/butyl red/PTFE grey, 55° shore A, 1,3 mm, 10x100/pck

    Regular Price: $122.04

    Special Price $115.94

    sku: AAV19132791
  50. Altmann Analytik

    Septa, 11 mm diameter, silicone white/PTFE red, 45° shore A, 1,3 mm, 10 x 100 pc

    Regular Price: $270.34

    Special Price $256.82

    sku: AAV22131215
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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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