Why Choose Our KF25 fitting
- Precision machining by CNC lathes ensures minimal dimensional deviation in vacuum fittings.
- Strict adherence to ISO 2861 standards eliminates compatibility concerns.
- Polishing machines ensure KF25 fittings achieve high surface smoothness.
- Rigorous quality control protocols include spectrometer material verification, helium leak testing, and concentricity checks to guarantee product integrity.
- Custom KF25 fittings available for specialized vacuum systems.
OMSS-Your Reliable KF25 Fitting Supplier
OMSS has over 15 years of experience in manufacturing KF25 fittings, specializing in welding, surface polishing, and other precision machining techniques. OMSS KF25 fittings have lower surface roughness and extended service life, providing long-term support for your vacuum systems.
If you’re seeking a high-quality KF25 fitting supplier, OMSS will be your trusted partner.
Our Products
One end features a standard KF25 flange, while the other end is a short pipe that can be welded to other equipment.
The standard straight-through KF25 connector can be used in various vacuum piping systems.
A KF25 flange cover made from high-quality solid stainless steel for sealing purposes.
The KF25 fitting, designed for minor adjustments to pipe direction, offers lower airflow resistance.
Its right-angle turning design helps minimize the space occupied by vacuum piping systems.
Three outlets facilitate flow diversion or installation of additional equipment, using a T-shaped configuration.
A KF25 fitting for complex vacuum systems, enabling connections in multiple directions.
Highly integrated central cross vacuum connector serving as the hub of vacuum systems.
One end uses a pagoda-style design to prevent the hose from loosening or detaching.
Tapered design ensures smoother flow within vacuum pipes of varying specifications.
A tapered vacuum connector featuring a KF25 flange on one end and a KF40 flange on the other.
Used to connect vacuum piping to instruments with NPT threads, and fine threads prevent gas leakage.
Features of the KF25 fitting
OMSS KF25 fittings are manufactured in strict compliance with ISO 2861 standards, so don’t worry about compatibility issues with KF components from other brands.
Multiple shapes and styles ensure seamless connection with your other KF components, instruments, hoses, and more to form a vacuum-sealed system.
OMSS adheres to using stainless steel that complies with RoHS and ISO 9001 standards for manufacturing vacuum fittings used in fields such as semiconductors and pharmaceuticals.
The high hardness of KF25 fittings prevents them from denting, cracking, or wearing down during prolonged use, thereby maintaining their sealing integrity.
Low-dimensional deviation guarantees easy alignment between components and creates a secure connection, preventing leaks.
The stainless steel construction withstands prolonged exposure to temperatures up to 300°C without risk of damage.
Resistant to rust, and you can choose 316L stainless steel for enhanced resistance to salts, acids, and alkalis.
The smooth surface enhances the vacuum performance of KF25 fittings while making them easier to clean.
Easy and Efficient Installation
The KF25 fitting belongs to the KF system, which is easy to install and disassemble. Simply connect it with O-rings and centering rings, then secure it with a clamp to form a robust sealing system. You don’t need to purchase specialized tools to install such a simple system, significantly reducing the time required for vacuum system assembly.
For environments like laboratories, this portability undoubtedly boosts work efficiency and saves considerable time spent learning assembly procedures.
Stable and Reliable Sealing Performance
KF25 fittings feature polished surfaces and precise dimensions to help your piping systems achieve long-term stable seals. They maintain excellent sealing performance across many conditions, working reliably in systems ranging from standard atmospheric pressure to 10⁻⁸ mbar vacuum environments.
The durable stainless steel construction ensures your equipment maintains stable vacuum conditions over extended use, minimizing the risk of subsequent issues like gas leaks.
Customized Services to Meet Your Needs
In addition to providing a wide range of standard fittings, OMSS also supports modifying existing products or customizing KF25 fittings for your vacuum system.
Whether it involves tube length, bend angle, material, or the diameter of the opposite end, simply provide us with your specific requirements. We will assess the feasibility of your solution and proceed with manufacturing.
OMSS has expertise in multiple processes, including solution treatment and TIG welding, enabling us to produce many types of KF25 fittings.
Applications of the KF25 Fitting
For semiconductor equipment, the 316L KF25 fitting, which undergoes electropolishing and cleaning, is a wise choice. It helps gas delivery systems maintain a stable vacuum environment without generating particles or other contaminants, thereby preventing any compromise to the purity of your products.
This cleanliness remains consistent even after longterm use. Even after repeated sterilization cycles, the reliable 316L material resists corrosion and rust formation.
These high-seal-integrity connectors are frequently used to link vacuum piping systems with analytical instruments such as mass spectrometers. They can reduce the risk of gas leaks and thereby enhance the reliability of detection data.
Their smooth inner walls also facilitate faster and more efficient gas flow. When components like reducer conical vacuum fittings are used, gas is less likely to remain trapped within the system even when connecting different tubing lines, thus preventing interference.
This type of connector with excellent sealing performance is used to link vacuum piping systems with analytical instruments such as mass spectrometers. They reduce the risk of gas leaks and thereby enhance the reliability of detection data.
Their smooth inner walls also facilitate faster and more efficient gas flow. When components like reducer conical vacuum fittings are used, gas is less likely to remain trapped within the system even when connecting pipes of different sizes, thus preventing interference.
KF25 fittings are widely used in the production of industrial chemical raw materials involving vacuum systems. Their superior sealing performance isolates the production system from the external environment, enabling reactions to proceed smoothly.
Manufactured to ISO-KF standards, KF25 fittings also offer seamless compatibility with various industrial piping systems. Their convenient installation and disassembly methods significantly reduce equipment maintenance time, enhancing your economic efficiency.
In scientific research, connectors often face challenges posed by extreme conditions such as high temperatures, corrosion, and high-vacuum environments. High-quality KF25 fittings enable the construction of high-vacuum systems while withstanding the rigors of extreme temperatures and chemical exposure.
You can confidently use them in facilities like particle accelerators and space simulation chambers. Being low-magnetic or non-magnetic, they cause minimal interference with equipment.
KF25 fittings can be found in the vacuum systems of autoclaves or electron microscopes. Beyond providing the sealing necessary for proper equipment operation, they are fully capable of withstanding the high-pressure steam sterilization commonly used in medical settings, thereby ensuring medical safety.
What’s more, high-quality KF25 fittings have their content of substances harmful to the body, such as heavy metal ions, suppressed to an extremely low level.
- Certificate of Compliance
Customer Reviews
We purchased sanitary tri clamp fittings and stainless steel ferrules from OMSS for our beverage processing system. The dimensions were accurate, the polishing was clean, and the fittings connected smoothly with our existing pipes without additional adjustment. The consistent quality helped us improve installation efficiency.
EmilyOMSS supported our custom stainless steel fitting project from drawing confirmation to final production. Their engineers provided useful suggestions on material selection and processing details. The finished components matched our requirements well and performed reliably in our food equipment applications.
JohnOMSS has become one of our trusted stainless steel component suppliers. We appreciate their fast communication, clear order updates, and careful packaging. Even for customized parts with different specifications, they maintain good consistency between samples and mass production.
Sarah
The KF25 vacuum fittings and NW25 vacuum fittings you purchased are actually the same product, differing only in their designated applications.
NW stands for nominal diameter, used to denote pipe connection dimensions. NW25 indicates a nominal diameter of 25mm. KF25 signifies that these fittings are designed for quick-connect flange systems.
KF25 fittings are suitable for systems transporting oxygen, alcohol, and fine particulate matter. When constructed from 316L stainless steel, KF25 fittings can also seal the transport of chemicals like chlorine gas and dilute nitric acid.
However, the chemical compatibility of the KF25 system depends more on the material of the O-rings. In systems with high corrosion resistance requirements, combining 316L material with more corrosion-resistant Vition or FKM O-rings better ensures sealing integrity.
Overall, 304 stainless steel offers the best cost-performance ratio under most conditions and is sufficient for conventional vacuum systems transporting water vapor and other gases.
304L has a lower carbon content and is less prone to rusting after welding.
316L provides superior corrosion resistance and, after EP treatment, can be used in high-vacuum systems below 10⁻⁷ Pa.
For KF25 fittings, slight magnetism is normal as long as the post-manufacturing inspection (PMI) is passed. The stainless steel used to make vacuum fittings is inherently non-magnetic. During bending or welding processes, the physical or chemical structure of the stainless steel changes, imparting magnetic properties to it.
OMSS carefully packages KF25 fittings that have undergone ultrasonic cleaning before shipment to ensure safety. Your purchased products will be individually wrapped in bubble wrap and securely arranged within the box to prevent damage from movement.
Additionally, OMSS uses palletized logistics for shipping. Goods are secured to the base pallet using strapping bands and stretch wrap, further preventing impact damage. This ensures you receive your high-quality KF25 fittings safely.
What Is a KF25 Fitting?
KF25 fittings are flanged connectors used in vacuum systems. The most common KF25 fittings appear as tubes with rings at both ends.
The term KF25 originates from the ISO 2861 standard system, referring to the ISO-KF (Klein Flange) system designed for quick installation. You can simply understand it as a size standard for vacuum systems that are easy to install and disassemble. KF25 indicates that the central pipe section has an inner diameter of 25mm.
This type of vacuum fitting typically forms a complete ISO-KF vacuum connection system when combined with clamps, O-rings, and centering rings.
How Smoothness Affects KF25 Fitting Performance
Sealing Performance
Rough surfaces are often the primary cause of poor sealing in piping systems.
The KF system relies on compressing the O-ring on the center ring to achieve sealing. Rough surfaces on KF25 fittings can damage the O-ring, creating tiny channels for gas escape. This undoubtedly puts your vacuum system at risk of leakage.
Gas Release Rate
The rough surface of the KF25 Fitting Sealing acts like a cave where children playing hide-and-seek can easily hide, trapping various gases or water vapor.
When the fittings are installed in a vacuum system, these gases are released, slowing down the system’s vacuum attainment speed or preventing it from reaching the designed vacuum limit.
If subjected to electropolishing, the number of potential hiding spots for these gases is significantly reduced, thereby reducing outgassing under vacuum conditions.
Air Extraction Efficiency
Only on a smooth slide does sliding down flow effortlessly. Imagine the gas within your vacuum system as a child sliding down a slide—rough surfaces impede its flow inside. When gas meets smooth inner walls, it will flow more quickly, enabling smoother evacuation.
Corrosion Resistance and Cleanliness
The surface roughness of vacuum fittings affects how easily gases, dust, and other chemicals adhere to them. Rough surfaces are more prone to residue buildup, leading to persistent corrosion and potentially contaminating the materials inside the piping system.
In summary, the surface roughness of the KF25 fitting significantly impacts its sealing performance, durability, and cleanliness, making it a key factor to focus on when you select the vacuum fittings.
How to Customize KF25 Fittings
If you wish to customize KF25 fittings for your vacuum piping system, here is a customization guide for your reference.
Step 1: When customizing, a detailed data specification is essential to enhance efficiency and better meet your needs. It should include the following:
- Application
- Specific Material
- Type of End Connections
- Total Length
- Shape
Step 2: We will evaluate your data and requirements. If feasible, we will provide a processing plan and design drawings. If you have existing drawings, you may also submit them to us. You will need to confirm the drawings and plan, paying particular attention to tolerances and concentricity.
Step 3: Once the plan and quotation are confirmed, we will proceed with sample production according to the specified process. You will need to reconfirm whether the sample’s precision and other aspects meet your requirements. If adjustments are needed, the factory will produce new samples.
Step 4: Following sample approval, we proceed with mass manufacturing of your custom KF25 fittings. OMSS conducts rigorous inspections upon material arrival and post-production to verify dimensions, material composition, and overall quality.
Step 5: Your KF25 fittings will be meticulously packaged and shipped to your specified destination via logistics.
