Catalog Number - 95020-23

The 95020-23 MICROSOLV Headspace Septa are a made‑to‑order, high‑purity septa option designed for use with 18 mm precision thread (ND18) screw‑top headspace caps, which are sold separately.

These septa feature white silicone rubber laminated with blue PTFE, providing excellent chemical inertness, low extractables, and reliable sealing performance for sensitive headspace GC applications.

Custom Order Item – Critical Notice

• 🚨 Made‑to‑order product

• Non‑returnable and non‑cancelable once ordered

• May require:

  • Lead time

  • Availability confirmation

✅ Recommended for validated systems requiring specific septa configurations

Designed for ND18 Screw Cap Systems

• Diameter: 17.5 mm septa

• Compatible with:

  • 18 mm precision thread (ND18) screw caps

• Caps are:

  • Sold separately

✅ Ensures correct fit and proper sealing when paired with ND18 caps

Silicone/PTFE Construction – High Purity Performance

• White silicone rubber / blue PTFE

• Provides:

  • High chemical inertness

  • Low extractables and bleed

  • Clean chromatographic baselines

✅ Ideal for sensitive GC headspace analyses

Durable Septa Characteristics

• Thickness: 1.5 mm

• Durometer: 55 Shore A

• Provides:

  • Increased durability vs. softer septa

  • Controlled needle penetration

  • Excellent resealing performance

✅ Suitable for multi‑injection workflows

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Suitable for:

• Heated headspace GC

• VOC and semi‑volatile analysis

• Temperature‑demanding applications

Bulk Packaging – High Throughput Efficiency

• 1000 septa per case

• Supplied in:

  • Polyethylene bag

• Designed for:

  • High‑volume laboratories

  • Production environments

✅ Improves inventory efficiency and cost control

Performance Positioning – High Purity Septa Option

• Compared to butyl septa:

  • ✅ Lower extractables

  • ✅ Higher chemical inertness

• Compared to softer silicone/PTFE:

  • ✅ Increased durability (55 Shore A)

• Compared to pre‑assembled caps:

  • ✅ Flexible pairing with preferred screw caps

✅ Ideal for:

• high‑purity headspace GC workflows

• customized cap/septa combinations

• automated autosampler systems

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• High‑throughput analytical labs

Important Usage Notes

• Designed for:

  • ND18 screw‑top caps only

• Septa:

  • Must be paired with compatible caps (sold separately)

✅ Best suited for:

• custom assembly workflows requiring high‑purity septa

🚨 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: