Description

18mm magnetic precision screw metal cap, silicone/PTFE septa, PTFE/butyl septa

Caps

Metal caps offer the widest range of temperature tolerances and are very resistant to fracture from impact. Metal caps are great for gas chromatography  applications. A metal closure is manufactured from either steel (coated with anti-corrosive coating of either chromeplate or tinplate) or aluminum.

Septa

PTFE/Silicone Septa:

High quality, pure silicone is laminated to PTFE to give a pure, highly inert septum with excellent resealing characteristics even after repeated punctures.

PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical. Works well for applications where ease of needle penetration is important.

Septa-silica gel has strong repetitive sealability, and it can maintain good close performance after multiple injections; PTFE is a material with better chemical conditions at present, and it can withstand strong acids and alkalis. The two materials After compounding, the bottle can be used for various laboratory purposes such as sealed sampling, chemical storage and so on. 

Gray PTFE/ Butyl Septa:

The Gray Butyl septum with PTFE barrier is an economical solution for low temperature (100°C), low-pressure applications. This septum is restricted for use with many solvents, and is not compatible with alkanes, benzene, chlorinated solvents or cyclohexane. Gray butyl offers good sealing characteristics for fixed gases and low molecular weight compounds.

Butyl rubber/PTFE septa are used with ketones and acids, and where silicone-containing septa do not perform well. Both types of silicone and butyl rubber septa have a PTFE barrier layer which faces the sample, which reduces the contact between the sample and the silicone and butyl rubber.

The butyl septa on the PTFE surface can be used in the headspace sample bottle to evaluate the injection activity and the penetration efficiency of methyl bromide on the activated carbon. The septum can be used to seal the vial during liquid sample collection for unmodified benzene analysis using HPLC method.

18mm Screw Headspace Cap Detials

Company Introduction

1. Founded in 2007, Zhejiang Aijiren, Inc. specialized in chromatography consumables, such as autosampler vial for HPLC, headspace vial, GC vials, micro inserts, septa and caps, syringe filter, etc, covers more than 10000 square meters, and has clean workshop more than 2000 square meters. 100, 000 class cleaning room;  

2. 15 years export experience, exprot to more than 70 countries, 2000+ customs around the world; 

3. More than 10 years experience for automatic analytica technique

4. Aijiren has own R&D Center and Quality Controll Center to keep products in high quality.

5. All materials are produced at 100,000 grade clean room.
6. Passed ISO9001:2015  quality management system certification, RoHS compliance can also be provided.