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Bottle Septa

Altmann Analytik

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

$29.33

sku: AAV23131279
Agilent Technologies

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

$25.75

sku: AG5183-4460
Thermo Fisher Scientific

Septa, 10/90, Teflon/Silicone for 18-400, 100/PAK

$36.12

sku: TFB7995-18
Altmann Analytik

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

$120.12

sku: AAV20132370
Altmann Analytik

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

$245.16

sku: AAV20132371
Altmann Analytik

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

$235.19

sku: AAV20132891
Altmann Analytik

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

$295.12

sku: AAV23131254
Altmann Analytik

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

$319.41

sku: AAV23131719
Altmann Analytik

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

$532.66

sku: AAV31131252
Altmann Analytik

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

$224.86

sku: AAV33131653
Altmann Analytik

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

$242.34

sku: AAV33132212
Altmann Analytik

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

$485.51

sku: AAV33132219
Altmann Analytik

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

$281.64

sku: AAV33132501
Altmann Analytik

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

$279.29

sku: AAV31132591
Altmann Analytik

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

$213.60

sku: AAV19131214
Altmann Analytik

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

$29.21

sku: AAV19131288
Altmann Analytik

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

$58.29

sku: AAV19131343
Altmann Analytik

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

$84.46

sku: AAV19133077
Altmann Analytik

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

$74.96

sku: AAV23131334
Altmann Analytik

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

$547.91

sku: AAV23131433
Altmann Analytik

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

$185.33

sku: AAV27131764
Altmann Analytik

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

$189.80

sku: AAV27132495
Altmann Analytik

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

$569.85

sku: AAV28132691
Altmann Analytik

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

$532.66

sku: AAV31131749
Altmann Analytik

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

$129.97

sku: AAV20132929
Supelco

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

$101.63

sku: SU27539
Supelco

PK100 PTFE/SILICONE SEPTA FOR 4ML VIAL

$77.38

sku: SU27144
Agilent Technologies

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

$38.51

sku: AG9301-1031
Restek

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

$51.23

sku: RE24694
Agilent Technologies

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

$36.85

sku: AG5182-0729
Altmann Analytik

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

$43.40

sku: AAV20292047
Altmann Analytik

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

$43.40

sku: AAV21292048
Altmann Analytik

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

$43.40

sku: AAV22292049
Altmann Analytik

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

$43.40

sku: AAV23292050
Altmann Analytik

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

$43.40

sku: AAV28292051
Altmann Analytik

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

$454.54

sku: AAV19131331
Altmann Analytik

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

$224.16

sku: AAV19131674
Altmann Analytik

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

$454.54

sku: AAV19131885
Altmann Analytik

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

$245.16

sku: AAV20131834
Altmann Analytik

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

$38.71

sku: AAV20132091
Altmann Analytik

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

$350.26

sku: AAV20132372
Altmann Analytik

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

$462.75

sku: AAV20132438
Altmann Analytik

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

$117.53

sku: AAV20132890
Altmann Analytik

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

$312.72

sku: AAV20132892
Altmann Analytik

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

$387.79

sku: AAV20133053
Altmann Analytik

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

$40.11

sku: AAV21131757
Altmann Analytik

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

$474.36

sku: AAV22131332
Altmann Analytik

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

$248.32

sku: AAV28132526
Altmann Analytik

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

$536.42

sku: AAV28132528
Thermo Fisher Scientific

EPA Septa Silicone/PTFE 24mm

$47.96

sku: TF24-ST3-EPA

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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