Seal Quality Factors - Teledyne Tekmar Versa User Manual

An overcrimped vial may cause a cored septum or bent needle. The hole in the Teflon® face may be 50% larger than in
a properly crimped seal.
In an overcrimped vial, the top surface of the vial will be convex and may have a small, raised ridge around the edge.
The seal will be partially extruded from the target hole in the vial and have a concave shape. In some cases, the skirt of
the vial may have pleats around the collar.
If the seal is only slightly overcrimped, the small, raised edge may be the only symptom. This can be corrected by
reducing crimp pressure.

seal quality factors

Several factors affect the quality of a seal:
• Seal/vial variations
• Amount of effort needed to make the seal
• Quality of the crimping tool
High quality glass vials may have a tolerance of +/- 0.2mm collar height and the seal may range in thicknesses of
2.5mm to 3.0mm. Teledyne Tekmar recommends that you use an adjustable crimping tool to allow for these variations.
Hand or plier-type crimpers accommodate varying seals and vial thicknesses, but require more effort than automatic
crimpers, especially when you have multiple vials to crimp at one time.
Teledyne Tekmar recommends the Crimp Station to efficiently cap and seal vials. It has steel jaws that provide
more stability.
For more information on vial preparation or for product information, please call Teledyne Tekmar locally and outside
the U.S. at:
outside the U.s.a.: Country Code + 1 (513) 229-7000
Versa User Manual
Figure 3-3: Over Crimped Vial
U.s.a.: (800) 874-2004
Installation & Setup • Page 3-3
www.teledynetekmar.com