Why Choose Our Vacuum Fittings?
- With high-precision processing and reliable sealing structure, it makes sure long-term stable operation in a high-vacuum environment.
- Standardized KF, ISO, and CF series can be compatible with vacuum systems, reducing assembly costs.
- Stainless steel materials have excellent corrosion resistance, temperature resistance, and mechanical strength, suitable for various complex working conditions.
- The installation and disassembly are efficient, effectively shortening equipment maintenance time and downtime.
- Support for custom design according to drawings and non-standard processing, flexibly meeting your special size and application requirements.
OMSS — Your Reliable Vacuum Fitting Supplier
As a professional supplier of stainless steel accessories with over 15 years of manufacturing experience, we offer you high-quality and hygienic vacuum fittings. They can meet the application requirements in fields such as semiconductors and new energy. Moreover, we also provide one-stop OEM customization solutions to fulfill your special needs.
If your project requires vacuum fittings, OMSS is your ideal choice. Please feel free to contact OMSS at any time to obtain product quotations!
KF Series Vacuum Fittings

It alters the direction of vacuum piping and is suitable for equipment with limited space.

Primarily used for branching or multi-way connections, which is commonly used in complex vacuum piping structures.

It can firmly hold both ends of the KF flange and apply a balanced clamping force. It is a key component for achieving quick installation and disassembly.

As the basic interface form in the KF series, it mainly connects pipes, cavities or other KF components, and achieves quick sealing through O-rings or clamps.
CF Series Vacuum Fittings

It alters the direction of vacuum piping and is suitable for equipment with limited space.

Used for straight connection between two CF flanges, featuring a simple structure and reliable sealing. It is commonly used for direct connection between vacuum chambers and piping.


Used to seal unused CF interfaces, maintaining the overall vacuum integrity of the system.
ISO Series Vacuum Fittings

Secured via claw clamps and bolts, which offer robust installation and high load-bearing capacity. It is widely used in vacuum systems which require superior mechanical strength.

Directly fastened with through-hole bolts, providing exceptional structural stability. This structure is suitable for large-scale vacuum equipment that requires permanent, fixed installations.

Used to alter the direction of vacuum piping, ideal for large-diameter vacuum systems with limited space.

It is used to close the inactive ISO interface to maintain the integrity of the entire system.
Features of Vacuum Fitting

Our vacuum fittings are equipped with O-rings or metal sealing designs, which effectively prevent gas leakage and ensure the stability and reliability of the system’s vacuum level.

Our vacuum fittings include the KF, ISO and CF series that comply with international standards, which can meet the requirements of different vacuum levels and pipe diameters.

We use CNC precision processing technology, which can ensure the consistency of the fitting dimensions and make it easy to assemble.

Our vacuum fittings are made of sanitary-grade stainless steel. This material possesses excellent corrosion resistance, high strength and a long service life.

You can connect using clamps, bolts or flanges to meet your different equipment structures and maintenance requirements.

From low vacuum, high vacuum to ultra-high vacuum environments, there are corresponding fittings available for you to choose.

We offer customized designs for non-standard sizes and special structures, which is highly suitable for your complex and unique systems.

Our vacuum fittings are widely used in semiconductors, new energy vehicles and industrial vacuum systems, etc.
High Vacuum Sealing Performance
Our vacuum fittings adopt a mature sealing design combined with precise manufacturing techniques. They can achieve extremely low leakage rates in both high vacuum and ultra-high vacuum environments and maintain long-term stability. They are particularly suitable for applications where high vacuum reliability is required.


Standard Specifications with Strong Compatibility
Our KF, ISO and CF series vacuum fittings all comply with mainstream international standards, which feature high dimensional accuracy. They can be directly matched with your existing vacuum equipment and pipeline, helping to reduce the selection risks and save your assembly costs.
Support for Non-Standard Customization
The numerical control precision processing technology we employ not only enables us to provide standard vacuum accessories, but also allows us to carry out customized production for you, to meet your specific requirements in terms of structure, size and operating conditions.

Applications of Vacuum Fittings
Our vacuum fittings are widely used in the semiconductor manufacturing industry. It is mainly used to connect chambers, pipelines and functional modules, which ensures the stable operation of your equipment in a high-vacuum environment and meets the strict requirements of semiconductor processes for cleanliness and sealing.

In vacuum equipment, our vacuum fittings can form a flexible and reliable piping system, which makes it convenient for you to frequently disassemble and adjust your equipment, while making sure the stability and repeatability of the vacuum environment during the experiment.

Our vacuum fittings are the key connecting components in physical vapor deposition (PVD), chemical vapor deposition (CVD) and other vacuum coating systems. Even under complex conditions, their sealing performance remains stable, which helps ensure the continuity and consistency of the coating, and improves the quality of product surface treatment.

In various industrial vacuum equipment and vacuum pipeline systems, our vacuum fittings can reliably connect different devices. Their structure takes into account both strength and ease of maintenance, which makes them suitable for your long-term continuous production environment.
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Customer Reviews
Our vacuum fittings are usually made of stainless steel, which offers advantages such as corrosion resistance, high mechanical strength and vacuum compatibility. For special applications, you can also customize the material according to the specific working conditions.
Common sealing methods include rubber O-ring seals and metal seals. Rubber O-ring seals offer easy installation and lower cost. Metal seals, however, achieve extremely low leakage rates under high-temperature and ultra-high vacuum conditions.
During installation, you should ensure the flanges and sealing surfaces remain clean to avoid scratching the sealing structure. Tighten evenly according to specifications to ensure reliable sealing and extend the service life of the fittings.
Different series of vacuum fittings typically differ in structure and sealing methods, which makes direct interchangeability generally impossible. However, with the help of adapters, you can reliably connect between KF, ISO, and CF connectors.
For vacuum fittings sealed with O-rings, it is recommended to regularly check and replace the seals after prolonged use or frequent disassembly to ensure consistent sealing performance and system vacuum integrity.
What Are Vacuum Fittings?
Vacuum fittings are crucial connecting components used in vacuum systems to connect pipes and equipment. Its core function is to achieve stable mechanical connection and reliable sealing in a high vacuum environment, preventing gas leakage and ensuring that your system maintains a vacuum level and operates stably.
Our vacuum fittings are usually made of sanitary stainless steel, which are widely used in semiconductor equipment, laboratory instruments, and various industrial vacuum devices.
The Main Series of Vacuum Fittings
KF Series Vacuum Fittings
The KF series vacuum fittings can be quickly installed and disassembled. They are usually sealed and fixed through the central ring sealing ring and clamps, which are suitable for vacuum ranges from low to high.
This series has high installation efficiency and is easy to maintain. It is particularly suitable for equipment that requires frequent disassembly or adjustment, as well as small and medium-sized industrial vacuum systems.
CF Series Vacuum Fittings
The CF series vacuum fittings are mainly used in ultra-high vacuum environments. They feature a metal sealing structure formed by a metal cutting edge and an oxygen-free copper gasket.
This type of vacuum fitting has extremely high sealing reliability and is commonly used in fields such as semiconductor equipment and particle accelerators where strict requirements for vacuum stability are imposed.
ISO Series Vacuum Fittings
The ISO series vacuum fittings are suitable for large-diameter standard connections in medium-high vacuum systems. They are usually securely connected through bolt or clamp structures, which balance excellent sealing performance and mechanical strength.
This series of vacuum fittings is widely used in industrial vacuum equipment and large-scale vacuum pipeline systems, which is particularly suitable for projects with high requirements for pipeline diameter and structural stability.
How to Choose the Right Vacuum Fittings for You?
Vacuum Grade
Firstly, it is necessary to determine the required vacuum range of the system. For systems ranging from low vacuum to high vacuum, KF or ISO vacuum fittings can be selected. while for ultra-high vacuum environments with higher requirements for leakage rate and stability, it is recommended to prioritize the CF series sealed vacuum fittings.
Installation and Maintenance Methods
If your application system requires frequent disassembly and debugging, the KF series with convenient installation is more advantageous. If it is applied to fixed systems that need to operate stably for a long time, considering structural strength and long-term sealing performance, ISO or CF vacuum fittings would be more suitable.
Pipe Diameter Size
For small-diameter vacuum pipelines, the KF series is usually used. While for medium and large-diameter vacuum pipelines with higher requirements for mechanical strength, the ISO vacuum fittings or customized vacuum fittings are more suitable.
Sealing Method
The KF series and ISO series use rubber ring sealing, which offers good sealing performance and is relatively cost-effective. However, they cannot withstand high temperatures and extreme vacuum. If they need to be exposed to high-temperature baking in a vacuum system, the CF series metal sealing structure should be selected.
Materials and Environment
The requirements for materials vary depending on the application. Our sanitary vacuum fittings use common stainless steel vacuum connectors, which are suitable for most industrial and research manufacturing scenarios. For lightweight or special gas environments, you can choose to customize the material according to your needs.
















