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. 1000/CS
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‑M screw caps feature a PTFE/silicone/PTFE septa construction that increases contact with the autosampler needle during penetration. This design is particularly useful for certain legacy systems, such as Agilent 1050 instruments, where improved needle wiping and cleaning can enhance analytical results.
The layered septa also provide modestly improved resealing compared to standard silicone/PTFE septa, supporting more consistent injections in repeat use. The red polypropylene cap includes a knurled exterior for secure handling 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
Chemically resistant materials ✅ Maintains 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
Case quantity format (1000/CS)