Septa, 8 mm, silicone blue

LABSOLUTE®

Description Hardness Thickness mm PK
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Purchase order number
7613313
Cat. No. Description Hardness Thickness mm PK

8

7613313 Silicone blue transparent / PTFE white 45° shore A 1.3 1000

1

7615125 Silicone white / PTFE blue, slitted* 55° shore A 0.9 1000

10

7615159 Silicone cream / PTFE red 55° shore A 1.5 1000

7

7615160 Silicone white / PTFE red 45° shore A 1.3 1000

11

7616847 PTFE red / silicone white / PTFE red 45° shore A 1.0 1000

2

7620438 PTFE virginal* 53° shore D 0.25 1000

6

7621194 Butyl red / PTFE grey 55° shore A 1.3 1000

4

7622297 Natural rubber red-orange / TEF transparent 60° shore A 1.3 1000

3

7630195 Natural rubber red-orange / TEF transparent 60° shore A 1.0 1000

9

7646521 Silicone dark blue / PTFE white 45° shore A 1.3 1000

5

7654480 RedRubber / PTFE beige 45° shore A 1.0 1000

The choice of the right septa depends on the application. Many septa are PTFE coated on one side. PTFE is highly resistant against many chemicals and forms an inert border between the sample and the base material of the septa.

The septa's base material has various physical and chemical properties, like temperature resistance, resealability, cleanliness, hardness and thickness.

Natural rubber/TEF

  • Temperature-resistant from -40 °C to 120 °C
  • Excellent resealability properties
  • Inexpensive for standard applications in the fields of GC and HPLC

RedRubber/PTFE
  • Temperature-resistant from -30 °C to 110 °C
  • Softer and therefore easier to penetrate than natural rubber
  • Not as good resealability properties as natural rubber
  • Higher chemical purity than natural rubber
  • Inexpensive for standard applications in the fields of GC and HPLC

Butyl/PTFE
  • Temperature-resistant from -40 °C to 120 °C
  • Higher chemical purity than natural rubber and RedRubber

Silicone/PTFE
  • Temperature-resistant from -60 °C to 200 °C
  • More suitable for single-injection applications
  • Much higher chemical purity than natural rubber and RedRubber
  • Very low particle formation during penetration in case of double-sided PTFE coating
  • Best for the thin and fragile needles of the autosampler
  • Best for critical analysis (UltraClean quality)

Septa with a double-sided PTFE coating show a very low particle formation during penetration.

Accessories
Without septa