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Screw Caps with Septa for 8-425 Screw Vial for Manufacturer

Aijiren’s 8-425 screw caps paired with PTFE/silicone septa provide secure, chemically inert sealing for HPLC, GC, and LC-MS vials. OEM options available for custom color and logo.

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Product Overview

Aijiren’s 8-425 Screw Caps with PTFE/Silicone Septa are engineered to offer reliable, chemically resistant closures for 8-425 threaded autosampler vials. These caps combine robust mechanical strength with a high-quality septum to maintain sample integrity, minimize evaporation, and support repeated injections. They are ideal for labs using HPLC, LC-MS, or GC workflows, particularly for applications where secure sealing and chemical compatibility are essential.

2. Key Features & Advantages

  • High-Quality Septa: The PTFE/silicone septum provides excellent chemical inertness and durability, allowing multiple penetrations while maintaining a tight seal.

  • Secure Screw Closure: The 8-425 threaded screw cap ensures consistent torque, reducing the risk of sample leakage.

  • Chemical Compatibility: The combination of PTFE and silicone and the metal/plastic cap materials resists acids, bases, and a wide range of organic solvents.

  • Low Particulate Shedding: Designed to minimize particle generation during septum penetration, protecting sensitive analytical instruments.

  • Re-sealable and Reusable: Screw design allows for repeated opening and resealing without degrading septum performance.

  • Customization: OEM options include custom cap color, printing of logos or batch numbers, and pre-assembled caps + septa.

3. Applications

  • HPLC Sample Preparation: Ideal for autosampler vials in high-throughput HPLC workflows.

  • LC-MS / LC-MS/MS: Useful for trace-level analysis where septum purity and re-sealability matter.

  • GC Analysis: Suitable for solvent or sample storage before injection.

  • Quality Control Labs: Perfect for labs needing tight sealing and repeated sampling cycles.

  • Pharmaceutical and Biotech: Useful in R&D, QC, and stability testing.

4. Quality Assurance & Manufacturing

  • Strict Quality Tests: Each cap + septum batch undergoes seal integrity testing, penetration resistance, and chemical compatibility checks.

  • Clean Production: Manufactured in clean environments to minimize contamination risk.

  • Batch Traceability: Lot numbers and COA (Certificate of Analysis) are provided upon request.

  • Compliance Options: Can meet ISO or GMP-related packaging and cleanliness standards with customization.

5. Packaging & Customization

  • Standard Pack: 100 caps + septa per box (or customized pack size).

  • OEM Customization: Custom colors, laser-etched logos or batch codes, septum material variants.

  • Protective Packaging: Foam inserts / trays to protect caps during transportation; anti-static options available.

7. FAQ

Q1: What septum materials are available for the 8-425 screw cap?
A1: We offer PTFE/silicone septa, which combine chemical resistance with excellent reseal capability.

Q2: Is this cap compatible with commonly used autosamplers?
A2: Yes, the 8-425 thread is widely supported by major HPLC/LC-MS autosampler systems.

Q3: Can I reuse the cap and septum multiple times?
A3: Yes, the screw design allows for repeated opening and resealing, and the septum is durable to many punctures.

Q4: Is OEM or custom branding supported?
A4: Absolutely — we can customize cap color, add logos or batch codes, and pre-assemble cap + septum.

Q5: How do you ensure the screw cap + septum is clean and free from contamination?
A5: Every batch undergoes solvent cleaning, part inspection, and sealing performance tests. COA provided upon request.

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