Quick Couplings – Hydraulic Couplings

Hydraulic hose couplings are essential connection components in hydraulic systems. They connect two hydraulic lines and seal them against external influences such as pressure, dirt and moisture. Their main purpose is to ensure the safe and loss-free transfer of hydraulic fluids between machines and components, making them indispensable in many applications.

• Steel – for high pressure and durability
• Stainless steel – for corrosion resistance in aggressive environments

Material selection depends on operating pressure, temperature, corrosion requirements and the specific application conditions.

Couplings are available in various sizes and designs, matching different hose diameters (e.g. DN 6 to DN 51) and connection standards.

• Key criteria: flow rate (l/min), maximum operating pressure (up to approx. 350 bar), suitable thread type
• Designs: screw couplings for permanent connections, quick-release couplings for fast coupling

• Construction machinery
• Agricultural machinery (tractors, forestry equipment)
• Industrial hydraulic systems
• Marine applications
• Wind turbines
• Mobile and stationary machinery

They enable flexible movement, rapid equipment changes and contribute to serviceability.

• Fast, often tool-free connecting and disconnecting
• Leak-free connections thanks to robust sealing elements
• High resistance to pressure and temperature fluctuations
• Flexibility through plug-in connections
• Extended service life due to special coatings and corrosion protection

Hydraulic hose couplings usually consist of two parts – plug and socket – and include internal components such as valves, balls, springs and seals to ensure secure, drip-free connection.

• Quick-release couplings – easy handling, fast coupling
• Screw couplings – preferred for permanent connections

• Regular cleaning to remove dirt
• Inspection and replacement of seals
• Checking for leaks
• Pressure testing to verify performance
• Use of dust caps when not in use

Service life depends on operating conditions, material quality and maintenance intensity. High-quality materials and coatings significantly extend the lifespan.

Dust protection note: Dust caps protect against dirt, dust, sand, moisture and other particles, prevent damage and maintain functionality. They are typically made from impact-resistant plastic or rubber, are precisely fitted and should always be used during storage, transport or when the coupling is not in use.

• Maximum operating pressure
• Permissible temperature range
• Correct size and thread type
• Chemical compatibility with the hydraulic fluid
• Environmental conditions (e.g. corrosion or dirt exposure)
• Requirements for ease of handling (frequent coupling vs. permanent connection)

Proper selection prevents malfunctions, leaks and costly downtime.