XYOON's Double Ferrule Tube Fittings adopt an independent two-stage sealing structure, breaking through the aging problems of traditional threaded seals and being able to withstand a pressure of 69 MPa and endure millions of vibration cycles without loosening. The entire series strictly follows international standards such as ISO, DIN, and SAE, allowing for global brand interchangeability and universal applicability. It is suitable for high-end precision working conditions in fields like aviation, rail transportation, semiconductors, hydrogen energy, etc. It supports batch production, OEM customization, and large-scale engineering support, providing long-lasting and stable sealing, significantly reducing downtime losses in high-end fluid systems.
In high-pressure hydraulic systems, a single leaking connection can cause catastrophic failures, production shutdowns and safety accidents. Statistics show that 45% of hydraulic system failures are caused by poor-quality fittings, resulting in an average of 12 days of annual downtime per facility. Traditional threaded connections rely on sealants that degrade over time, while low-quality double ferrule fittings suffer from inconsistent deformation and premature fatigue.
A double ferrule fitting is a compression-type hydraulic connection consisting of four precision-machined components: a body, a front ferrule, a back ferrule and a nut. When the nut is tightened, it drives the back ferrule forward, which in turn pushes the front ferrule against the fitting body's conical surface. This creates two independent metal-to-metal seals: one between the front ferrule and the pipe, and another between the front ferrule and the fitting body.
Double Ferrule Tube Fittings is a type of connection component used in the control system pipelines of various industries such as oil refining, chemical engineering, petroleum, natural gas, food, pharmaceuticals, and instrumentation. It is suitable for connecting pipelines of oil, gas, water, etc. The connection method does not require welding, and is particularly suitable for scenarios that require fire prevention, explosion protection, high-altitude operations, and situations where welding is not feasible or not advisable. Additionally, double flange couplings that meet the EC-79 certification are also applied in pipeline systems of emerging fields such as hydrogen energy vehicles.
Aerospace: Aircraft hydraulic systems, landing gear, fuel systems
Rail Transit: Train braking systems, door control systems, suspension systems
Semiconductor: Ultra-high purity gas delivery systems, vacuum equipment
Medical Equipment: Surgical robots, MRI machines, oxygen delivery systems
Oil & Gas: Offshore drilling equipment, well control systems
Power Generation: Nuclear power plants, gas turbines, hydroelectric turbines
This series of Double Ferrule Tube Fittings fully complies with global unified fluid pipeline manufacturing standards, avoiding procurement problems such as inconsistent specifications in foreign trade projects, failure of acceptance, and inability to be compatible or replaceable. They are compatible with the vast majority of precision hydraulic and gas control systems worldwide.
The products strictly follow the three major international authoritative standards of ISO 8434, DIN 2999, and SAE J514. The size accuracy, sealing stroke, and mating deformation parameters are completely unified. They can be directly interchanged with pipeline, connectors, and seamless steel pipes from overseas leading brands without the need for secondary pipe modification or reconfiguration of the pipeline layout. For products配套 for the hydrogen energy field, EC-79 compliance certification materials can be provided to meet the requirements for new energy vehicle pipeline access.
The factory has passed the ISO9001 quality management system certification. Each batch of products comes with complete size inspection, high-pressure holding pressure, and vibration durability test reports. An EN10204 3.1 material traceability certificate can be provided, adapting to the strict bidding and acceptance standards of high-end projects such as aviation, semiconductor, and nuclear power, helping overseas customers smoothly clear customs and pass the factory qualification review.
Before assembly, it is necessary to ensure that the end face of the steel pipe is flat without burrs, the outer wall has no scratches or dents, and there are no impurities or iron filings on the pipe wall. All impurities and iron filings must be thoroughly cleaned to avoid residual hard particles that may damage the metal sealing surface. It is strictly prohibited to apply sealing glue or tape as auxiliary sealing materials to the double socket joints. Excess glue that overflows into the pipeline will clog the precision valve body and damping holes, causing faults in the entire system.
Insert the steel pipe straight into the bottom of the joint to ensure a complete fit without any suspended gaps. Manually tighten the nut until there is obvious resistance; then use a wrench to apply uniform force to rotate 1/4 to 1/2 turn to complete the plastic bite of the socket. It is strictly prohibited to forcefully tighten or under-tighten. Under-tightening will cause the socket not to fully bite the pipe wall, and it is very likely to leak under high-pressure vibration; over-tightening will cause excessive cutting of the pipe wall and fatigue deformation of the socket, shortening the service life of the pipeline.
For high and low temperature alternating and high-frequency vibration working conditions, it is necessary to strictly control the uniformity of the tightening torque to ensure that the front and rear sockets are under synchronous force and symmetrical deformation, and to avoid unilateral bite inhomogeneity, which may form hidden leakage points. When installing the welded pipeline, it is necessary to take precautions for the joint insulation in advance to avoid the destruction of socket hardness and sealing accuracy due to high-temperature annealing during welding.
For high-end precision equipment and long-term engineering procurement needs, we have established a hierarchical warranty and after-sales system.
Under the conditions of proper installation, matching the rated pressure, and using standard pipe materials, Double Ferrule Tube Fittings enjoy a 12-month original factory warranty. Problems such as leakage, sealing failure, and structural cracking caused by raw material defects, processing precision deviations, or non-compliant factory performance will be free of charge replaced or spare parts reissued.
Faults caused by human violent disassembly, non-compliant pipe materials,私自 modifying the joint structure, overpressure and overworking conditions, and residual installation impurities are not within the warranty scope. All factory products come with Chinese and English installation manuals, which can prevent problems caused by human operational errors in advance.
Support for non-standard special shapes, special materials, and special sizes of double ferrule tube fittings. Customized production can be carried out based on customer equipment drawings and working condition parameters. Large-scale engineering projects can provide full technical coordination, on-site installation guidance, and reference solutions. For bulk purchases, complete and compliant qualification documents can be provided as a package.
Equipped with a professional English technical team, 24-hour response is provided for overseas customers' selection, installation, and troubleshooting consultation. Standard models are always in stock, and samples can be sent, small batches of spare parts can be directly dispatched, and full container delivery can be provided. Long-term cooperation customers can reserve safety stocks to ensure stable project schedules.
Compared with ordinary universal connectors, Double Ferrule Tube Fittings focus on stable operation in high-end precision environments, addressing industry pain points such as long-term leakage shutdowns, frequent maintenance, and poor adaptability to working conditions, and meeting the requirements of high-precision and high-security level equipment.
Abandoning the aging defects of traditional rubber seals and glue seals, it adopts a full-metal two-stage plastic sealing structure, which is not affected by high temperatures, low temperatures, and medium corrosion, and eliminates the problem of aging and failure of sealing components. After the equipment is put into use, there is no need for regular tightening or replacement of sealing components, significantly reducing the operation and maintenance costs of high-end equipment.
The exclusive mechanical locking structure of the rear sleeve can absorb the high-frequency vibration and pressure shock of the equipment, and does not loosen after 120 million vibration cycles, perfectly adapting to harsh scenarios such as rail transit braking systems, aircraft onboard oil circuits, and dynamic hydraulic systems of construction machinery with frequent vibrations.
The entire process does not require welding or hot work operations, meeting safety standards for explosion prevention, fire prevention, high-altitude construction, and clean workshops. It can be applied to special working conditions where hot work operations are prohibited, such as chemical oil, pharmaceutical food, semiconductor high-purity gas pipelines, and has a higher construction safety coefficient.
Through precise forging and CNC precision processing, combined with gradient hardening technology, the product has excellent fatigue and corrosion resistance. Under normal working conditions, the service life can reach more than 15 years, significantly reducing the frequency of pipeline replacement and equipment downtime losses, and the long-term comprehensive usage cost is much lower than that of ordinary economic-type connectors.
Q1: What is the difference between double ferrule and single ferrule fittings?
A: Double ferrule fittings have two ferrules that provide both sealing and mechanical locking, offering superior anti-vibration performance and higher pressure ratings. Single ferrule fittings have only one ferrule that performs both functions, making them more suitable for low to medium pressure applications.
Q2: Can XYOON double ferrule fittings be used with pipes from other manufacturers?
A: Yes, our fittings are manufactured in strict accordance with international standards and are fully compatible with any seamless steel pipe that meets the required dimensional tolerances. We recommend using precision cold-drawn seamless pipes for optimal performance.
Q3: Are Double Ferrule Tube Fittings reusable after disassembly?
A: The front and back ferrules are precision deformed during initial installation and belong to one-time wearing parts. They cannot be reused after disassembly. The fitting body and nut can be reused repeatedly, but new matching ferrules must be replaced for reassembly to ensure zero leakage and vibration resistance.
Q4: Can these double ferrule fittings be used for gas and liquid media simultaneously?
A: Yes. Our precision double ferrule fittings are suitable for hydraulic oil, water, compressed air, nitrogen and other conventional industrial media. The full metal sealing structure has no aging failure risk, stably adapting to both liquid hydraulic circuits and high-purity gas delivery pipelines.
Q5: What surface treatment is adopted for your stainless steel double ferrule fittings?
A: All 304/316L stainless steel fittings adopt deburring and passivation treatment, removing surface impurities and improving corrosion resistance. For marine and chemical harsh working conditions, customized electrolytic polishing treatment is available to further enhance oxidation and salt spray resistance.
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