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Catalog No. MN702071
Part No. 702071
Supplier MACHEREY‑NAGEL
Crimp closure, N 20, alu.,pressure rel.,center hole,Butyl d.gray/PTFE gray,3.0mm
Net Price
Special offer
Availability

6 weeks

PROPERTIES
  • Hazardous material
    No
  • Nominal diameter
    N 20
  • Recommended application(s)
    Headspace
  • Autosampler compatibility
    Agilent, PerkinElmer
  • Storage temperature
    RT
  • Scope of delivery
    100x N 20 ready assembled crimp closures
  • Closure type
    Crimp closure
  • Assembling process
    Assembled
  • Cap material
    Aluminum
  • Cap color
    Silver
  • Cap hole
    Yes
  • Closure magnetic
    No
  • Septa material
    Butyl/PTFE (high purity), Butyl/PTFE (Pharma-Fix)
  • Colors of septa material
    Dark gray/gray
  • Septa thickness
    3.0 mm
  • Septa hardness
    50° shore A
  • Additional closure features
    Molded septum, only centrically laminated with PTFE, typically called Pharma-Fix, excellent sealing, temp. resistant from -40 °C up to 120 °C
  • Additional cap features
    Pressure release cap (safety) - bridges of the scorelines open at a pressure of more than 3 bars (± 0.5 bars) and release pressure in a controlled way
DESCRIPTION
These closures with molded Butyl/PTFE septa are only laminated with PTFE in the contact area with the sample. Thus the elastomeric Butyl can achieve on the vial's glass rims a very tight seal, while in comparison a completely PTFE covered septum would have a very slippery surface on the glass and could easily be twisted around. These typically called "Pharma-Fix" closures have a good analytical purity. The bridges of the cap's scorelines break open at an internal vial pressure exceeding 3 bars (± 0.5 bars), thus releasing overpressure in a crontrolled way. Functionality of the cap is not depending on the design of the vial's crimp neck (beveled top, flat crimp neck).
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