cap with septa

Screw Cap Vials are universal. Screwing the cap applies a mechanical force that squeezes the septum between the glass rim and the cap. Screw caps form an excellent seal and mechanically hold the septum in place during piercing. No tools are required for assembly.

Screw cap vials are universal. When the cap is screwed on, a mechanical force is applied that compresses the septum between the rim of the vial and the cap. Screw caps provide an excellent seal and mechanically hold the septum in place during piercing. No tools are required for assembly.

Bonded Caps & Septa effectively eliminates needle shedding and prevents septum shedding
The cover pad is integrally formed, ready to use

Crimp Neck Closures produced by Aijiren are often used in Crimp top Headspace Vial. The production of Crimp Neck Closures is fully automated. As a factory with 20 years of production experience, Aijiren can meet the quality of Crimp Neck Closures and become a well-known manufacturer of chromatographic consumables in China.

The worker of Aijiren shown in the picture is inserting a 22mm Silicone/PTFE Septa into a 24mm Screw neck Cap. The worker wears finger cots and holds a tool to press harder to consolidate the tightness of the Cap and Septa. Since Aijiren’s automated merging of Cap and Septa machines is only suitable for the closure of 2ml autosampler vial, this large-volume closure requires manual combination by workers. Aijiren uses a dust-free workshop for production and packaging, so customers can be completely assured of hygiene issues.

The 9mm Screw Closures produced by Aijiren have many advantages such as high quality, strong adaptability, resistance to cracking, high temperature resistance, chemical resistance, etc. Since 9mm Screw Closures have many different styles and materials, the demand for 9mm Screw Closures is very high. High and diversified options also allow customers multiple choices.

The 24mm Screw Cap produced by Aijiren is often paired with 24mm Sample Storage Vial. This type of Vial is used to store samples and sometimes used in autosamplers. For example, 40ml Vial is often called EPA Vial, and the center hole on the Cap is here. It will be useful in time, the sampling tool can easily pierce through the septa for sampling without causing sample contamination.

Aijiren’s septa for 24mm screw closures uses natural-color Silicone and PTFE. These Septas have a diameter of 22mm and a thickness of 3mm, which are consistent with the size of the Cap and can be placed between the Vial and the Cap to isolate the air and the sample. The size is 3mm. The thickness is also very suitable for needle piercing. The material of Septa is soft and tough, not easily deformed and will not break.

There are two types of 24mm Screw neck Cap, center hole and closed-top. The cap with center hole can be more convenient for sample injection. The closed top can store samples and has better sealing. It can have its own for 20ml-60ml. Storage range and capacity.

Aijiren provides as many product types as possible for every customer who uses chromatography consumables. Among them, 9mm Vial and Closures are one of the most popular choices. Aijiren will continue to work hard to improve product quality and control the monitoring of the production line. Ensure that there are no errors between products.

The Cap of Closures in the picture has a Center Hole, which is convenient for Autosampler to perform needle sampling. If you are worried about the difficulty of automatic injection needle sampling, you can also consider purchasing a pre-slit septa. This type of septa is divided into a cut and a cross The two types of incisions are especially useful for blunt circular injection needles.

11mm Snap Top Closures are made of PP. The translucent Cap design allows users to see the fixed card slot. The inside of the Snap Cap has 4 protrusions for fixing in the lateral groove of the Vial Neck.

Caps for screw thread vials are available with either an open hole for autosampler use and standard addition or with a solid top for sample storage. One piece polypropylene cap and membrane are also available. These pierceable screw thread caps are designed for one time use and reduce sample preparation time as there is no cap and seal to assemble.

Polypropylene caps are known for good impact strength, cost effectiveness, and pliability. They can be remelted after they are formed. Aijiren Polypropylene cap is widely used in chromatography analysis.

The metal cover provides the widest temperature tolerance range and is very resistant to impact cracking. The metal cover is very suitable for gas chromatography applications. The metal cover is made of steel (chrome-plated or tinplate anti-corrosion coating) or aluminum.

Storage Vial is supplied by Aijiren. These vials are pre-sterilized and have a capacity of 5ml. These vials can be used for storing biological material, human and animal cells. The cap is provided with a built-in seal ring which makes the vial leakproof. The base of the vial has longitudinal grooves which gives it a non-twisting character when placed in a vial rack.

Caps for screw thread vials are available with either an open hole for autosampler use and standard addition or with a solid top for sample storage. One piece polypropylene cap and membrane are also available. These pierceable screw thread caps are designed for one time use and reduce sample preparation time as there is no cap and seal to assemble.

Polypropylene Screw Cap with Septa – Polypropylene screw cap with precision-fit septa provide an evaporation-proof seal. Bi-layer include silicone and PTFE. Silicone septa for multiple injections. PTFE-lined screw cap for organic samples. Screw caps provide an inert, airtight seal and direct puncture-access to samples with a syringe needle.

The 20mm Crimp Top Caps produced by Aijiren have a diameter of 20mm and a center hole with a diameter of 9.5mm. The color is the silver color of aluminum itself, which is very modern and beautiful. The matched septa are all 20*3mm, and the double-sided synthetic septa ensures the sealing.

The screw cap produced by Aijiren is engraved with knurling on the side for excellent grip and comfort when applying it to a vial. The silicone rubber/PTFE septa used in the lining can provide an appropriate amount of resistance for the auto-injection needle during the sampling process, so that they can penetrate the sample bottle correctly without damaging the septum or the injection needle.

The 9mm screw vial cap can have a 6mm opening for autosampler use and standard addition, or it can have a solid top for storing samples. A polypropylene cap and diaphragm are also available. These pierceable screw caps are designed for one-time use, and because there are no caps and seals to assemble, the sample preparation time is reduced.

The polypropylene screw cap with diaphragm prevents evaporation and is highly sealed. The double layer includes silicone and PTFE. The 9mm screw cap has a shorter thread, which shortens the sealing time. The silicone septum can be injected multiple times. Screw caps lined with PTFE are used for organic samples. The screw cap provides an inert air-tight seal and can be directly pierced through the sample with a syringe needle.

Aijiren’s 20ml Headspace Vial has a specification of 22.5*75mm. It has two colors, clear and amber. The glass type of precision screw headspace vial is 5.0 type, but 20ml clear precision screw headspace vial has a type with or without label area.

With the use of headspace vials, the whole experiment can be prepared for analysis in an efficient and accurate way. The essence of this experiment is that the volatile sample is heated and vaporized to form a gas in the top space of the headspace vial and then diffuses. Finally, the gas in the vial enters the gas phase detection.