The NB-KSL has produced high-quality tube and pipe fittings in various materials for high-pressure applications since its establishment in 2010.
As a result of tremendous efforts in research and development during the last 3 years, NB-KSL has gained an excellent reputation as a leading manufacturer of high-pressure instrumentation Products.
The NB-KSL range of connectors has been developed to fill the rapidly increasing demand for tube fittings suitable for high-pressure use in environments such as petrochemical, fluid, power, nuclear, electronic, as well as other major industrial fields.
NB-K5L tube fittings have been carefully manufactured to withstand the persistent demands for high-performance tube fittings. Each one has passed a stringent tolerance test for high
pressure, impulse, vibration, vacuum and temperature. These precision-machined fittings are manufactured to exacting standards, employing the most modern state of-the-art computerized automation. All NB-KSE” fittings are backed by NB-KSL commitment to the highest quality-control standards
and skilled craftsmanship.
The NB-KSL tube fitting is a mechanism used both to seal and to grip tubing. The mechanical advantage and geometry of this kind of fitting produces a leak-tight assembly.
To assemble, simply insert the tube into the complete assembly until the tube bottoms out against the shoulder of the fitting body. The two ferrules are driven forward between the nut and fitting body using the mechanical force created by rotating the nut clockwise. The back ferrule is driven against the tapered rear of the front ferrule and the front ferrule is driven by force into the tapered mouth of the body.
The rear ferrule is swaged radially inwards on the tube while lifting the front ferrule out to form a full-faced seal on the tapered surface of the body.
The 1-1 / 4 turn of the nut from the hand-tight position assures consistent drive of the sealing members. This ensures an effective seal against high pressure as well as ultra high vacuum conditions.
As China Stainless Steel Tube Fittings Manufacturers and Stainless Steel Compression Fittings Factory, Our company specializes in the manufacturing and sales of stainless steel pipe fittings and valves in national (GB), American (ANSI/ASME), and British (BS) standards. We are equipped with advanced CNC machining centers, material testing and heat treatment facilities, a skilled technical team, and a robust production workforce. With a sound quality management system and excellent after-sales service, we sincerely serve customers worldwide.
Our main products include: ferrule-type fittings, threaded fittings, instrument fittings, instrument needle valves, instrument ball valves, ferrule needle valves, ferrule ball valves, compact high-pressure instrument needle valves, compact high-pressure instrument ball valves, and high-pressure check valves. The primary material is SS316 stainless steel. These products are widely used in petrochemical, petroleum, electric power, pharmaceutical, food, papermaking, marine, and general machinery industries.
We strictly control product quality at every stage and are committed to delivering superior quality through advanced technology and professional management. Adhering to the business philosophy of "Quality First, Customer Supreme, Integrity Foremost," we strive to build the "NB-KSL" brand image, better serve our customers, and work together with you to create a prosperous future.
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In modern industrial fluid and gas transmission systems, the reliability of pipeline connections is directly determined by the quality of tube fittings. As professional Stainless Steel Tube Fittings Manufacturers, Ningbo Keshengli Stainless Steel Valve Co., Ltd. is committed to providing high-precision, corrosion-resistant, and durable tube fitting solutions that meet the strict requirements of global industries such as petrochemical, pharmaceutical, energy, marine engineering, and precision instrumentation.
Stainless steel tube fittings are widely used because they provide a safe, detachable, and highly sealed connection method without welding. Compared with traditional carbon steel or plastic fittings, stainless steel (especially SS316) offers significantly improved resistance to corrosion, high temperature, and chemical erosion. This makes it ideal for harsh environments such as offshore platforms, chemical processing plants, and high-pressure hydraulic systems.
Our company integrates advanced CNC machining centers, precision measuring equipment, and strict material testing systems to ensure that every fitting meets international standards such as GB, ANSI/ASME, and BS. Each product undergoes multiple inspection stages, including dimensional accuracy testing, surface treatment evaluation, and pressure resistance testing. This ensures that our fittings maintain stable sealing performance even under long-term operation.
We also offer a complete product range including ferrule tube fittings, threaded fittings, elbows, tees, reducers, and customized connection components. These fittings are designed for compatibility with global pipeline systems and can be easily integrated into complex industrial networks.
| Product Type | Material | Key Feature | Application Industry |
|---|---|---|---|
| Ferrule Tube Fittings | SS316 | High sealing performance | Instrumentation systems |
| Threaded Fittings | SS316 | Easy installation | General pipeline systems |
| Elbow Fittings | SS316 | Flow direction control | Chemical pipelines |
| Tee Fittings | SS316 | Branch distribution | Industrial systems |
As a responsible manufacturer, Ningbo Keshengli Stainless Steel Valve Co., Ltd. continuously improves production efficiency and product precision through a skilled technical team and modern manufacturing philosophy. Our goal is to provide customers with safe, stable, and long-lasting tube connection solutions.
FAQ
Q1: What makes stainless steel tube fittings reliable?
A1: High corrosion resistance, precision machining, and strong sealing performance.
Q2: Which industries use your tube fittings?
A2: Petrochemical, pharmaceutical, marine, energy, and instrumentation industries.
Q3: Can you produce custom designs?
A3: Yes, we support OEM/ODM customization based on customer drawings.
Compression fittings play a critical role in ensuring leak-free and stable performance in modern industrial piping systems. As a professional Stainless Steel Compression Fittings Factory, Ningbo Keshengli Stainless Steel Valve Co., Ltd. specializes in manufacturing high-quality compression fittings designed for precision, safety, and long service life in demanding environments.
Unlike welded or threaded connections, compression fittings use a mechanical compression structure that tightly grips the tube using a ferrule and nut system. This design eliminates the need for welding, reduces installation complexity, and allows for easy maintenance and disassembly. It is especially suitable for instrumentation systems, hydraulic pipelines, gas distribution systems, and high-pressure control environments.
We manufacture our compression fittings using premium SS316 stainless steel, which provides excellent resistance to corrosion, oxidation, and chemical exposure. This ensures long-term stability even in aggressive media such as seawater, acids, and industrial gases. Our CNC machining technology ensures extremely tight tolerances, which is critical for achieving consistent sealing performance.
Every product produced by Ningbo Keshengli Stainless Steel Valve Co., Ltd. undergoes strict quality inspection, including pressure testing, leakage detection, torque testing, and surface finish verification. We ensure that every fitting meets international standards and customer expectations for safety and reliability.
| Component | Material | Function | Advantage |
|---|---|---|---|
| Body | SS316 | Structural support | High strength |
| Ferrule | SS316 | Compression sealing | Leak prevention |
| Nut | SS316 | Tightening mechanism | Easy assembly |
| Tube Interface | SS316 | Connection point | Stable performance |
Our compression fittings are widely used in petrochemical plants, pharmaceutical production lines, food processing systems, and laboratory instrumentation. The combination of precision engineering and high-quality materials ensures that our products maintain stable performance even under vibration, pressure fluctuations, and long-term operation.
FAQ
Q1: What is the advantage of compression fittings over welding?
A1: They are easier to install, maintain, and replace without welding equipment.
Q2: Are compression fittings reusable?
A2: Yes, depending on system conditions and installation quality.
Q3: Do you support high-pressure applications?
A3: Yes, our fittings are designed for high-pressure industrial systems.
In complex industrial pipeline systems, long-term reliability depends on material quality, structural design, machining precision, and sealing technology. The integration of stainless steel tube fittings and compression fittings provides a complete solution for safe, efficient, and durable fluid control systems. As a trusted manufacturer, Ningbo Keshengli Stainless Steel Valve Co., Ltd. focuses on delivering integrated pipeline connection solutions that ensure stable operation under extreme industrial conditions.
The foundation of reliability begins with material selection. We use SS316 stainless steel as the primary material due to its excellent corrosion resistance, especially in chloride-rich environments such as marine applications and chemical processing systems. This ensures that fittings maintain structural integrity even after long-term exposure to harsh media.
Another key factor is manufacturing precision. Our advanced CNC machining centers ensure that every component meets strict dimensional tolerances. This precision is essential for achieving proper sealing between tubes and fittings. In addition, heat treatment processes improve mechanical strength and fatigue resistance, ensuring long service life even under high-pressure or vibration conditions.
The combination of tube fittings and compression fittings creates a flexible yet highly secure pipeline system. Tube fittings allow modular design and easy system expansion, while compression fittings provide strong, leak-free sealing. Together, they form a complete engineering solution widely used in petrochemical systems, energy facilities, pharmaceutical production, and instrumentation control systems.
| System Component | Function | Key Benefit |
|---|---|---|
| Tube Fittings | Pipeline connection | Flexibility |
| Compression Fittings | Sealing system | Leak prevention |
| SS316 Material | Structural base | Corrosion resistance |
| CNC Precision Machining | Manufacturing accuracy | System stability |
At Ningbo Keshengli Stainless Steel Valve Co., Ltd., we strictly follow the business philosophy of “Quality First, Customer Supreme, Integrity Foremost.” Every product is tested through pressure inspection, leakage testing, and dimensional verification before delivery. We are committed to providing global customers with reliable, efficient, and long-lasting stainless steel pipeline solutions.
FAQ
Q1: Can tube fittings and compression fittings be used in one system?
A1: Yes, they are designed to work together in integrated pipeline systems.
Q2: What ensures long-term reliability?
A2: SS316 material, precision machining, and strict quality control.
Q3: Do you support global export?
A3: Yes, we supply customers worldwide with stable logistics and service support.
1 Zhongxin Yungu Zone D Building 1, Jiangkou Street, Fenghua District, Ningbo City, Zhejiang Province, China
+86-574-88561893 / +86-15057497901
Copyright © Ningbo Keshengli Stainless Steel Valve Co., Ltd. Rights Reserved.
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