Catalog Number - 95025-08-2S

The 95025-08-2S BASIK Headspace Caps are a made‑to‑order, high‑purity configuration combining ultra‑low bleed silicone/PTFE septa with a pressure‑relief aluminum cap design, delivering exceptional sample purity, reliable sealing, and enhanced safety for pressurized headspace GC applications.

These caps are fitted in 20 mm aluminum closures with an 8 mm center hole, providing increased septa contact area for improved sealing while maintaining smooth, consistent autosampler needle access.

✅ Recommended for validated high‑sensitivity methods requiring pressure relief and ultra‑clean septa

• Pressure Relief Caps with Silicone/PTFE Septa

Pressure Relief Design – Engineered Safety

• Scored aluminum caps designed to vent at ~3.0 ± 0.5 bar

• Helps prevent:

  • Vial rupture

  • Over‑pressurization

• Protects:

  • Laboratory personnel

  • Instrumentation

✅ Ideal for volatile or pressurized headspace GC workflows

High Purity Silicone/PTFE Septa – Ultra Low Bleed Performance

• White silicone rubber / white PTFE

• Proprietary manufacturing process provides:

  • Ultra‑low bleed

  • Low extractables

  • High chemical purity

✅ Ideal for:

• trace‑level detection

• sensitive GC analyses

• regulated laboratory environments

Soft Septa – Easy Needle Penetration

• Durometer: 45 Shore A (soft formulation)

• Septa thickness: 3.0 mm

• Provides:

  • Reduced needle resistance

  • Smooth penetration

  • Lower autosampler wear

✅ Improves injection reproducibility and throughput

8 mm Center Hole – Improved Seal Integrity

• Smaller opening than standard 10 mm

• Provides:

  • Increased septa contact area

  • Enhanced sealing performance

✅ Ideal for maximum seal reliability with pressure‑relief safety

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Suitable for:

• Heated headspace GC

• Volatile and semi‑volatile compounds

• Broad analytical method conditions

Crimp Top Design – Secure Containment

• 20 mm aluminum crimp cap

• Provides:

  • Airtight sealing (until vent threshold is reached)

  • Reliable containment of volatile samples

✅ Ensures accurate and reproducible results

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

✅ Ensures:

• Proper fit

• Consistent analytical performance

Performance Positioning – High Purity + Safety Option

• Compared to non‑relief silicone/PTFE:

  • ✅ Added safety via controlled venting

• Compared to butyl/PTFE systems:

  • ✅ Lower extractables and higher purity

• Compared to fully laminated blue silicone options:

  • ✅ Ultra‑low bleed emphasis

✅ Ideal for:

• high‑sensitivity GC methods

• volatile samples

• safety‑critical workflows

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC and validation

• Environmental VOC analysis

• Food and flavor testing

• Trace‑level contamination detection

• Pressurized headspace workflows

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Pressure‑relief feature:

  • Will vent at defined pressure

  • Not intended for pressure retention above limit

✅ Best suited for:

• high‑purity, safety‑focused analytical applications

Made‑to‑Order & Pricing Information

This is a custom, made‑to‑order item.

• Please contact Customer Service for formal quotation, lead time, and ordering assistance. Classification: