WEO 420 plug-in fittings

WEO is a hydraulic plug-in solution adding spill-free functionality to the hose connections while also saving space in the design, making connections quicker and preventing premature hose failures. The innovative push-to-connect feature provides easy engagement of the product's male and female halves. The fittings are self-aligning to avoid twisting the hose and thereby extending the hose life. The simple connection and disconnection make it easy to assemble and replace even in confined or difficult-to-reach applications.

Technical data

Material Steel (Zinc-Nickel)
Max working pressure (range) 420 bar (6.092 PSI), 420 bar (6092 PSI)
Min. burst pressure (range) 1680 bar (24366 PSI)
Min temperature (C) -30°C — +120°C (-22°F — +248°F)
Material seal HNBR
WEO Plug-In - The Innovative Problem Solver

WEO - The Innovative Problem Solver

The WEO Plug-in will enhance your design in terms of space, time and cost. Avoid leakages and premature hose failures with WEO Plug-in - The Innovative Problem Solver.

WEO is a smart and self-aligning plug-in fitting that enables quick and safe hydraulic hose kit assembly without any tools and the WEO cartridge is used for a fully integrated, compact design.


5 reasons to integrate WEO in your design:



WEO will save time both during machine manufacturing in the production line and when doing maintenance work like replacing hoses out in the field. WEO takes just a minute to connect, saving valuable time compared to screw couplings.

Compact dimensions

The compact dimensions of the WEO plug-in fittings open new design opportunities, especially when designing with the WEO cartridge and direct porting. WEO has low build dimensions for machine integration and requires only a little space for connection. These features will make it easy to fit WEO into your design.

No leakages

Screw couplings require specific torque for a leak-free and secure connection. Trained personnel are needed for this task to avoid under and over-torquing, resulting in leakage at the final tests. WEO requires none of that. Making a connection can quickly be done by hand, and a screwdriver makes the disconnection easier. With WEO, there is no risk of leaks due to inaccurate torque.

Prevent premature hose failures

When applying torque to screw couplings, embedded tension in the hoses is a common problem. As strained hoses are subject to pressure impulses, hose movement, and even rotation during operation, the lifetime of any such hose is shorter. WEO is self-aligning allowing the hose to find its resting position, minimizing the stress and prolonging its lifetime.

Worker safety and ergonomics

Carrying out time-consuming torquing operations in confined spaces may require awkward postures causing strains. WEO is easy to connect, and it only takes a few seconds.


Pump up the pressure - WEO 420 is here

Following the trends for higher hydraulic pressure, the WEO 420 is a highly durable solution designed for higher hydraulic pressure. It has 420 bar max working pressure and a zinc-nickel treatment for increased corrosion resistance. The HNBR seals allow higher operating temperatures. The WEO 420 is suitable for more demanding applications like cranes, skid steer loaders, and other machines requiring higher hydraulic pressure and operating temperature.

WEO 420  - Pump up the pressure
load movie 
WEO 420 - Pump up the pressure

WEO - Successfully preventing hose failures since 1997

The WEO hydraulic plug-in fittings have been available since 1997. For 25 years, WEO has offered an innovative solution that helps prevent and avoid leaks and extends the hose service life while also facilitating maintenance and hose replacements. These key features are more relevant now than ever. The first 25 years mark the beginning of the journey for WEO.


Screw fittings vs WEO Plug-in

WEO is a compact and versatile solution saving time and space. It may even open up new design possibilities compared to conventional screw couplings. The video below is a comparison of the time it takes to install the WEO plug-in compared to screw fittings.


Avoid leaks from under- or over-torquing

Under or over-torquing is a common cause of leaks when using screw fittings. Achieving the correct torque can be difficult and requires trained personnel. With WEO it is just to plug it in and no torquing is required.

Avoid embedded hose tension

When applying torque to screw fittings there is a big risk of embedded tension in the hoses. As strained hoses are subject to pressure impulses, hose movement and even rotation during operation, the lifetime of any such hose is dramatically reduced, resulting in premature failure and leakage. With the self-aligning WEO Plug-In, such hose and leakage problems can easily be avoided.


WEO Plug-in Coupling

A compact coupling solution for use with an existing manifold design. The WEO Plug-In coupling offers a multitude of thread or tube connections to replace your current screw fittings. No tools are needed for hose assembly.

Operator safety and quality assurance in focus

In the confined space between chassis and cabin, the operator has to carry out hose connection with a heavy cabin hovering over his head – a very exposed situation. Users of screw-connect fittings always have the challenge of achieving correct torque. Imagine performing this task with no room at all for tools. In many cases, this results in leakage from couplings and embedded tension in hoses that subsequently leads to leakage. With WEO you can work quickly and avoid leakage problems, since all you have to do is plug in.


WEO Plug-in Cartridge

WEO Cartridge is a refined component made for compact system integration. With the WEO cartridge fully integrated into the component design, it will open up new opportunities for a more compact design.

As no adapter is needed, costs are reduced and at the same time, one potential leakage point is eliminated. Reduce the footprint of your final design and enjoy extensive cost savings.

Minimal space requirements enable new design opportunities

With its minimal space requirements, the WEO cartridge allows designers to design new compact hydraulic systems. When incorporating this compact cartridge into your design, you can minimize the footprint of the final design by reducing the space between the ports. This means less material required and reduced costs.  Again, since our fittings simply plug in, you don’t have to worry about hand-tool clearance, unlike traditional screw fittings where extra clearance for tools is required when tightening.


WEO Plug-in Nipple

WEO is designed with an innovative push-to-connect feature that provides quick and quality-assured engagement of the product´s male and female halves. The only time you need a tool is to remove the assembly stop when disconnecting, and this can be done with a screwdriver or similar. Once the assembly stop is removed, you simply push the male nipple all the way in and pull it out from the female component.

The WEO nipple is an open standard. Are you interested in manufacturing your own WEO nipples? Get in contact with us today.


How to connect and disconnect the WEO plugin



  1. The nipple is connected to the coupling by simply plugging in.
  2. The nipple is securely locked with the unique WEO locking hooks.
  3. Using a screwdriver, remove the assembly stop.
  4. Push the nipple all the way in and then pull it firmly out.

WEO Nipple – The Global open Standard

By releasing the male part (nipple) as an open standard, CEJN sees a future where WEO is even more accessible around the globe thanks to more manufacturers and shorter distribution chains.

Co-operation is now available from CEJN to customers who wish to receive support in their manufacturing process of nipples. Just a registration and an agreement that the CEJN specifications are followed. It should be easy and accessible to become a WEO nipple manufacturer.

As always when an open standard is created, it is to protect the reputation of WEO and to ensure that the end user gets interchangeability, highest quality, performance and safety. The CEJN service will consist of specifications such as drawings and process parameters to reach specified performance and quality level. If changes are made on those parameters, CEJN will update the registered manufacturers.

Plug in to WEO - Become a WEO nipple manufacturer

Manuals and brochures

Clean and Leak-Free Hydraulic Systems

Clean and Leak-Free Hydraulic Systems

Instruction videos

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