Closures for analytics vials - description of closure types

Crimp caps with centre hole (ND11)

• ø 11 mm
• made of aluminium
• seal best of all cap variants
• require crimping tool for sealing

Special crimp caps with centre hole

• ND20: magnetic bimetal, 8 mm centre hole for CTC Combi PAL
• ND20:with pressure release covering the injection site, 8 mm centre hole
• ND20:FlipOff® with plastic FlipOff® button covering the injection site for quality assurance, 8 mm centre hole
• ND13 & ND20:with centre tear-off covering the injection site for quality assurance, 8 mm centre hole
• ND13 & ND20:with complete tear-off covering the injection site for quality assurance, 8 mm centre hole

Tips for crimping vials

Snap caps with centre hole (ND11, ND20)

• ø 11 mm, ø 20 mm*
• made of polyethylene
• have knobs on the inner edge that snap into the recessed ring in the vial head
• only recommended for aqueous and non-volatile samples

* for wash vials

Screw caps with centre hole (ND8, ND9, ND10)

made of glass fibre reinforced polyamide (ND9)

• ø 9 mm, compatible with Agilent
• temperature range from -40 °C to approx. 120 °C
• better tightening torque than caps made of polypropylene
• type of screw cap to provide the best seal

 made of polypropylene (ND8, ND9, ND10)

• ø 9 mm, compatible with Agilent
• thread standard 8-425 (Narrow Mouth)
• thread standard 10-425 (Wide Mouth)
• temperature range from -0 °C bis 80 °C

closed-top cap, polypropylene

• ø 15.5 mm, ø 22 mm
• to be used in combination with butyl rubber stoppers