Our double ferrule fittings are designed, manufactured, and quality controlled

Fd-lok double ferrule fittings are designed, manufactured, and quality controlled to be totally "interchangeable" with the Fd-lok brand of double ferrule fittings.
Fd-lok  product provide a reliable, leak-proof connection in instrumentation and process tubing systems, The double ferrule design, with the staged sequential swaging action of the ferrules during make-up, Back ferrule make a grip on tube & front ferrule work as sealing on tube, compensates for the variation in tubing materials, hardness, and thickness of the tube wall to provide leak-tight connections in an extensive range of applications.
These Fd-lok double ferrule fittings are used in process control as well as hydraulic and pneumatic applications in industries like chemical, petrochemical, fertilizer, offshore, power plants, etc. We have Fluid Lok double ferrule fitting in standard and customized sizes and nominal bore sizes with variety of end connections. These tubing fittings are designed and developed as per the international quality standards.

37° flare tube fitting benefits

— Assembly performs extremely well even under severe vibration and thermal shocks
— Upon tightening, the sleeve ensures tube alignment with fitting axis, reduces mechanical strain on tube and compensates for vibration
— Fitting can be equally coupled to metric or fractional tubes
— Tube does not undergo distortion, remains constant and fluid pressure losses are negligible
— The system leak free integrity remains after disassembly and reassembly
— Individual replacement of any component
Hy-Lok’s flare fittings are engineered to save the user money and time. They are economically priced and provide excellent service as well as longevity. These pipe fittings are designed to meet all system requirements and safety standards. Providing exceptional results and quality service, these 37°flare tube fittings are favored by many industries and consistently exceed the user’s expectations.

High pressure pipe fittings are widely applied in almost all the industries

With the booming development of modern industry,high pressure pipe fittings are widely applied in almost all the industries as the connector for pipes,especially for mining industry,oil&gas industry,chemical machinery,shipbuilding industry. ect.Such fittings include:elbow,tee,cross,cap,half coupling,coupling,and so on. All these forged fittings must withstand high pressure,so we call them high pressure forged fittings.
Due to the corrosion resistance and rustless of stainless steel,so it is commonly adopted for manufacturing forged fittings. Main material specifications are SS304 and SS316. Although there are a number of forged fittings used in different specifications,to standardized them,we distinguish them from size 1/8" to 2". And according to their specific usage,there are divided into threaded fittings and socket weld fittings.

Fd-lok double ferrule fittings

Fd-lok double ferrule fittings, instrumentation tube fittings provide leak-proof and torque-free seals at all tubing connections. The fittings are designed to reduce the chance of hazardous and expensive leaks in instrumentation, process, pneumatic, hydraulic, gas, and other tubing systems. The fittings consist of the nut, the back ferrule, the front ferrule, and the body. When installed they provide a five-piece connection with the addition of the tubing providing a solid leak-free joint. The two ferrules are tightly swaged around the tube and the lack of initial strain on the tubing ensures no tubing wall damage. Leaks are prevented because there is an axial movement along the tube instead of a rotary motion creating the joint. This axial movement prevents torque from being transmitted from the fitting to the tubing. Resistant to temperature change, the fittings do not significantly reduce flow area and work with a variety of tube materials. In addition, the two-ferrule action supersedes variations in the wall thickness, hardness, and dimensional tolerance of the tubes, ultimately compensating for most variables that lead to failure with other fittings. Brennan double ferrule compression tube fittings can be remade several times and can withstand heavy impulse and vibration in both vacuum and pressure systems. Requiring no special tools for installation or torque for initial makeup and using only geometry until it is tightly fitted.

Fd-lok fittings meet the industry standards

Fd-lok fittings meet the strict requirements of SAE J514 and ISO 8434-2 industry standards for 37° flared tube fittings.
Its design is simple. It uses an easily produced flare at the tube end to seal and hold fluid under high pressure. The fitting consists of three pieces: the body, sleeve and nut. The tube is flared at a 37° angle (74° included angle) and held between the fitting nose (seat) and the sleeve (support) with the nut providing a very effective seal between the fitting nose and the tube flare.
The design of Fd-lok stainless tube fittings are very efficient. The fitting incorporates the smallest seal area of all fitting types. This seal area is only slightly larger than the fluid flow area. The small seal area results in a compact design, low assembly torque, and a relatively high-pressure capability.

High pressure pipe fittings are parts used to connect hoses, pipes, and tubes in hydraulic systems

High pressure pipe fittings are parts used to connect hoses, pipes, and tubes in hydraulic systems. Hydraulic equipment generally operates under high pressures and is often not a fixed system. Consequently, hydraulic fittings need to be strong, versatile, and reliable to operate safely and effectively in their respective applications. These fittings typically adhere to strict standards which dictate fitting construction, dimensions, and pressure ratings. It is important to distinguish what type of hydraulic equipment is being connected in the system to determine what fittings are appropriate. Stainless steel tube weld fittings are seamless precision pipes specially manufactured for hydraulics. The tubes have standard sizes for different pressure ranges, with standard diameters up to 100 mm. Tubes lengths are interconnected via flanges, welding nipples, flare connections, or by cut-rings. Direct joining of tubes by welding is not acceptable since the interior cannot be inspected.

FD-LOK provide a range of Tube Compression Fittings

We provide a range of Tube Compression Fittings, Hydraulic singe ferrule fittings, and other fittings designed and manufactured to the highest standards.
Our fittings are used in industries such as petrochemicals, chemicals, desalinization, chromatography, hydraulics ... anywhere high precision fittings are required to work at high pressure. Our product range includes Twin Ferrule Tube Compression Fittings in 316 stainless steel pipe fittings.  All materials are sourced from approved EU Mills, with full 31b certification. Double ferrule fittings and Aluminum Bronze Compression Fittings have been designed and developed to meet the demands for reliable fittings manufactured high precision standards. We offer a range of Imperial and Metric sizes for use in pneumatic, process, cryogenic, instrument and hydraulic control systems - serving the chemical, petro-chemical, pharmaceutical, food, beverages, on and off-shore Oil and Gas, and many other uses.