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Chromatography Closures

Esslab MACHEREY-NAGEL Red Crimp Closures

Esslab MACHEREY-NAGEL Red Crimp Closures

Crimp closure, N 11, alu., red, center hole, Natural Rubber/Butyl/TEF, 1.0 mm

Cost-effective closure with the resealability properties of Natural rubber and the analytical purity of Butyl. Nowadays often replaced by Red Rubber/FEP closures that are also availalbe in colored caps to color-code different sample types, labs or shifts.
 

Crimp closure, N 11, alu., red, center hole, PTFE red/Silicone w./PTFE red,1.0mm

Both-sided PTFE laminated Silicone septa, so-called sandwich septa, are often used in high sensitive analysis and in research and development applications, since coring during penetration has been shown to be lowest here. Due to the high temperature resistance the material is ideal for usage in GC.
 

Crimp closure, N 11, alu., red, center hole, Red Rubber/FEP colorless, 1.0 mm

More modern and advanced septa material than Natural rubber or Butyl. It is easier to penetrate and causes less fragmentation which is why it is nowadays preferably used in all kinds of closure types as an economic seal.
 

Crimp closure, N 11, alu., red, center hole, Silicone white/PTFE red, 1.3 mm

This product belongs to our large selection of 11 mm aluminum crimp closures. Silicone/PTFE is the recommended by most instrument manufacturers due to its high analytical purity which makes it also suitable for more sensitive analysis. Easy and safe penetration along with low fragmentation and a high temperature resistance add to the advantages of this liner material.
 
  • Recommended application(s) - HPLC
  • Closure type - Crimp closure
  • Closure magnetic - No
  • Recommended application(s) - GC
  • Cap material - Aluminum
  • Cap hole - Yes
  • Assembling process - Assembled
  • Nominal diameter - N 11
  • Cap color - Red
     
Product Code
Septa thickness
Septa hardness
Colors of septa material
Septa material
Additional closure features
70231.2 1.0 mm 45° shore A Red-orange/colorless Natural rubber/Butyl/TEF Combines the good physical properties of NR (resealability) with the good chemical properties of Butyl (better analytical purity, softness)
702995.2 1.0 mm 50° shore A Red/white/red PTFE/Silicone/PTFE Temp. resistance -60 °C up to 200 °C / analytical purity - high / easy to medium hard to penetrate / low resealability, but very low fragmentation
702730.2 1.0 mm 45° shore A Red-orange/colorless Red Rubber/PTFE Temp. resistance -40 °C up to 110 °C / analytical purity - medium / medium hard to penetrate / medium resealability
70288.2 1.3 mm 45° shore A White/red Silicone/PTFE Temp. resistance -60 °C up to 200 °C / analytical purity - high / easy to penetrate / medium resealability
  • esslab macherey-nagel premier scientific chromatography catalogue

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