Septa Selection Guide

Optimise performance and results by choosing the right septum for your application:

PTFE Septa

• Exceptional solvent resistance
• Only suitable for single injection use – not recommended for sample storage before or after injection
• Not resealable
• The most economical septa
• Maximum service temperature 260°C

PTFE/Silicone Septa

• Excellent resealing capabilities – highly recommended for multiple injections and sample storage
• Autoclavable and excellent resistance to coring
• PTFE chemical resistance until pierced then the septa will have the compatibility of silicone
• Temperature range -40°C to 200°C

Pre-slit PTFE/Silicone Septa

• Reduces the possibility of coring with blunt tipped needles or for applications using a thin gauge needle
• Used to prevent vacuum from forming inside the vial
• Temperature range -40°C to 200°C

PTFE/Silicone/PTFE Septa

• Recommended for multiple injections due to above average resealing capabilities
• Autoclavable and excellent resistance to coring
• Recommended for demanding applications such as internal standards, trace analysis or applications where there will be a long time between injections
• Temperature range -40°C to 200°C

PTFE/Red Rubber Septa

• The most economical septa used in routine analysis
• Easy to pierce with moderate resealability
• PTFE chemical resistance until pierced then the septa will have the compatibility of rubber
• Not recommended when retaining samples for further analysis or for multiple injections
• Temperature range -40°C to 110°C

Moulded Polypropylene Septa

• Only suitable for single injection use – not recommended for sample storage before or after injection
• Not resealable
• Temperature range 0°C to 130°C