Septa, caps and liners play a key role in the storage and preparation of samples. They securely seal samples from the external environment while simultaneously allowing injection by sampling needles.
Cap types
Crimp caps |
|
Screw caps |
|
Snap caps |
|
Septa suitability with chemicals
The table below summarizes the suitability of each septa material with a range of chemicals, this can vary based on factors such as temperature, molecular weight and solvent concentration.
Filter by chemical:
|
PTFE |
PTFE/silicone |
PTFE/silicone/PTFE |
Viton |
Silicone |
Silicone/FEP |
Silicone/polyimide |
Butyl |
Foam (PTFE/polyethene foam) |
---|---|---|---|---|---|---|---|---|---|
Acetonitrile |
✓ |
✓ |
✓ |
|
✓ |
✓ |
✓ |
|
✓ |
Hydrocarbons |
✓ |
|
✓ |
|
✓ |
✓ |
✓ |
|
✓ |
Methanol |
✓ |
✓ |
✓ |
✓ |
|
✓ |
✓ |
✓ |
✓ |
Benzene |
✓ |
|
✓ |
✓ |
|
✓ |
✓ |
|
✓ |
THF |
✓ |
|
✓ |
|
|
✓ |
✓ |
|
✓ |
Toluene |
✓ |
|
✓ |
|
|
✓ |
✓ |
|
✓ |
DMF |
✓ |
✓ |
✓ |
|
✓ |
✓ |
✓ |
✓ |
✓ |
DMSO |
✓ |
✓ |
✓ |
|
✓ |
✓ |
|
|
✓ |
Ether |
✓ |
✓ |
✓ |
|
|
✓ |
✓ |
|
✓ |
DCM |
✓ |
|
✓ |
✓ |
|
✓ |
✓ |
|
✓ |
Alcohols (ethanol) |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
Acetic acid |
✓ |
✓ |
✓ |
|
✓ |
✓ |
✓ |
✓ |
✓ |
Acetone |
✓ |
✓ |
✓ |
✓ |
|
✓ |
✓ |
✓ |
✓ |
Phenol |
✓ |
✓ |
✓ |
|
|
✓ |
✓ |
✓ |
✓ |
Cyclohexane |
✓ |
|
✓ |
|
|
✓ |
✓ |
|
✓ |
Septa compatibility with applications
This table provides a summary of the suitability of our septa materials to a variety of applications.
|
PTFE |
PTFE/silicone |
PTFE/silicone/PTFE |
Viton |
Silicone |
Silicone/FEP |
Silicone/polyimide |
Butyl |
Natural rubber |
---|---|---|---|---|---|---|---|---|---|
Temperature range |
Up to 260°C |
-40°C to 250°C |
-40°C to 250°C |
-40°C to 260°C |
-40°C to 250°C |
-40°C to 250°C |
-40°C to 300°C |
-50°C to 150°C |
0°C to 90°C |
Multiple injections |
No |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
No |
No |
Price |
Very economical |
Economical |
Most expensive |
Economical |
Very economical |
Economical |
Expensive |
Economical |
Most economical |
Suitable for storage |
No |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
No |
Yes |
Best for |
|
|
|
|
|
|
|
|
|
Please refer to the brochure (includes part number lists) for more items.