Hydraulic fittings
The hydraulic fittings category in the connection technology section at LöSi® offers a comprehensive range of precision-manufactured fittings for hydraulic line and pipe systems. Whether straight screw-in fittings, angle or T-fittings, cutting ring or flange variants – high-quality hydraulic fittings are crucial for safe, leak-free connections in heavy-duty hydraulic systems.
Our solutions cover both mobile applications and stationary industrial systems – with a focus on tightness, robustness and variety.
What is a Hydraulic Fitting?
A hydraulic fitting (often called a tube fitting) is the universal connecting piece in pipeline construction. It serves to connect rigid hydraulic pipes or hose assemblies securely and leak-free to components such as pumps, cylinders, or control blocks.
The premier class here is the cutting ring fitting according to DIN 2353. When tightening the union nut, a hardened ring cuts into the tube and creates a positive connection that withstands extreme pressures. Our range covers all designs: From the Straight Screw-in Fitting (GE) to Elbow (WE) and complex T-Pieces (TE).
Advantages of Our Hydraulic Fittings
With fittings, precision determines whether you have a tight seal or an oil puddle. Our components are manufactured to the highest dimensional accuracy to minimize assembly errors.
Technical features for your safety:
- Variety of Series: Subdivided into Light Series (L) for standard applications and Heavy Series (S) for extreme pressures and pressure peaks (often over 600 bar).
- Sealing Systems: Choice of metallic sealing (cutting edge) or with additional O-ring seals (DKO) for maximum leak protection under vibrations.
- Connection Flexibility: Adapter solutions for the transition from Metric to Inch (BSP), JIC, or ORFS enable worldwide compatibility of your system.
- Corrosion Protection: High-quality surfaces (e.g., Zinc-Nickel) protect against rust in outdoor use.
Typical Areas of Application for Hydraulic Fittings
Fittings are the link in every hydraulic circuit. They are indispensable in:
- Stationary Plant Construction: Piping of hydraulic power units and presses (fixed installation).
- Mobile Machinery: Connection of hoses to valve blocks on excavators and cranes.
- Repair & Maintenance: Use of Adjustable Fittings (EV) to align lines subsequently.
- Shipbuilding & Offshore: Use of stainless steel fittings in corrosive environments.
Selection Criteria & Technical Data
The wrong fitting is the most common cause of leaks. Pay close attention to the connection geometry.
Check these parameters before ordering:
- Tube Outer Diameter (OD): Which tube (e.g., 12 mm, 16 mm, 22 mm) do you want to connect?
- Series (L vs. S): Attention! A 12L connection does not fit a 12S connection, as the thread sizes are different.
- Screw-in Thread: Check the thread in the component (Metric, BSP-Inch, NPT, or UNF). Use a thread gauge.
- Sealing Form: Do you need a soft seal (ED) for flat surfaces or an O-ring seal for cone connections?
Tip: Always use assembly paste when assembling stainless steel fittings to prevent "galling" of the thread.
Select & Order Hydraulic Fittings Now
Connect your system with safety. Browse our huge range of Ermeto-compliant fittings and adapters.
Use our filters for series and threads. Find the right fitting for your piping system now and order directly online!
