CUSTOM ITEM: Caps, Screw Top, with Red PTFE / White Silicone Rubber / Red PTFE Septa, fitted in "knurled", polypropylene, Red Caps. For use with 9-425mm thread, 12x32mm autosampler vials. MICROSOLV Brand. BULK PRICING.
Additional Info:
Tri‑layer septa are designed to improve needle wiping during injection, helping reduce carryover while maintaining consistent sealing performance.
The 9502S‑20C‑R screw caps feature a PTFE/silicone/PTFE septa construction that provides additional surface contact with the needle during penetration. This design is especially useful for certain legacy autosamplers, such as Agilent 1050 systems, where improved needle wiping and cleaning can enhance analytical performance.
The layered septa also provide slightly improved resealing compared to standard silicone/PTFE designs, supporting more reliable injections in repeat-use workflows. The red polypropylene cap includes a knurled exterior for secure grip and consistent sealing with standard 9‑425, 12 × 32 mm autosampler vials.
Key Features & Benefits
PTFE/silicone/PTFE tri-layer septa ✅ Enhanced needle wiping and reduced carryover
Improved resealing vs standard septa ✅ Supports repeat injections
Chemical-resistant materials ✅ Protects sample integrity
Fits 12 × 32 mm autosampler vials ✅ Standard 9‑425 compatibility
Red knurled cap ✅ Secure handling and identification
Typical Applications
HPLC and UHPLC analysis
LC‑MS and GC‑MS workflows
Legacy systems (e.g., Agilent 1050)
Methods requiring improved needle cleaning
Important Notes
For 9‑425, 12 × 32 mm autosampler vials only
Suitable for multiple injections
Designed for specific autosampler compatibility
This and other custom items are Custom Ordered and require quotation
Additional Resources
Custom Item Pricing Information