Industrial valves · Гидравлические фитинги STAUFF и сборочное оборудование
STAUFF Connect Fittings: Engineering Overview, Characteristics, and Installation Technologies
Stauff Connect Hydraulic Fittings – these are benchmark components for building sealed and reliable high-pressure hydraulic systems. Designed for integration into industrial and mobile circuits, these conical connections with a union nut guarantee stable operation under critical loads, including intense vibrations, peak pressures, and extreme temperature fluctuations.
EV Group China, as a leading technological distributor, supplies a comprehensive range of precision threaded and weldable Stauff fittings. All products comply with strict international standards ISO 8434-1, DIN 2353, and DIN 3949. Full interchangeability with components from other manufacturers that meet the same standards ensures predictable performance, absolute tightness, and durability of hydraulic lines of any configuration.
Design Features and Sealing Principle
Stauff threaded fittings use two time-tested sealing technologies: with an internal 24° and 37° cone. This design ensures precise mating with the hydraulic pipe, forming a reliable joint without the use of tapes or pastes. When the nut is tightened, a primary "metal-to-metal" seal is created. For systems with particularly high sealing requirements (for example, when working with gases or low-viscosity liquids), the joint can be additionally equipped with an elastomeric ring (soft seal), which completely eliminates micro-leaks even under pulsating loads and water hammer.
Key Engineering Advantages of STAUFF Connect:
- Extreme pressure resistance: The nominal working pressure for S series fittings reaches 800 bar, while maintaining a fourfold safety factor (4:1), which is critically important for safety.
- Optimized hydrodynamics: The internal geometry of the channels, designed using CFD modeling, ensures laminar flow of the working fluid, which minimizes pressure losses and prevents cavitation.
- Excellent corrosion protection: The proprietary zinc-nickel coating (STAUFF Zn/Ni) guarantees protection against red rust for over 1200 hours in a salt spray chamber, which complies with ISO 9227 standards and significantly surpasses standard galvanic coatings.
- Multiple reparability: The design of the fittings allows for multiple assembly-disassembly cycles without pipe deformation and loss of tightness, which significantly reduces operating costs throughout the entire life cycle of the equipment.
Types and Technical Characteristics of STAUFF Fittings
The product range includes solutions for any engineering task:
- 24° Fittings (DIN 2353) made of carbon steel: Equipped with a cutting ring. They are an industry standard for mobile equipment (excavators, cranes, drilling rigs) and stationary equipment (presses, machine tools), where vibration resistance is important.
- 24° Fittings made of stainless steel: Made from grades 1.4404/316L or 1.4571/316Ti. Used in chemically aggressive environments, food, pharmaceutical industries, and marine facilities.
- 37° Flare Fittings (SAE J514): A specialized solution for critical assemblies exposed to strong hydraulic pulsations. The uniform distribution of load along the flare cone ensures increased fatigue strength.
Summary Table of Parameters
| Modification | Standards | Tube diameters | Working pressure | Series and configuration |
|---|---|---|---|---|
| Steel, 24° cone | ISO 8434-1, DIN 2353 | 4–42 mm | Up to 800 bar | LL, L, S series. Equipped with cutting rings, DKO seals, weld-on cones. |
| Steel, 37° flare | ISO 8434-2, SAE J514 | 6–38 mm | Up to 630 bar | L and S series. Include 24°/37° adapters, sleeves, nuts, elbow and tee connections. |
| Stainless steel, 24° cone | ISO 8434-1 / DIN 2353 | 4–42 mm | Up to 800 bar | LL, L, S series. Full range of connectors, including plugs, adapters, and reducers. |
Installation Tools and Quality Control Equipment
Installation Tools
EV Group China supplies a complete arsenal of equipment for professional assembly of connections: from manual assembly studs for pre-assembly to automated machines for crimping and flaring. The use of specialized tools guarantees precise cutting ring insertion depth and uniform force, eliminating component damage and ensuring 100% joint reliability.
Pipe Preparation
The range includes precision tube benders, cut-off disc machines, and chamfering machines. High-quality preparation of the pipe end — a perpendicular cut and burr removal — is a prerequisite for achieving rated tightness and durability of the hydraulic line.
Quality Control
To verify the geometric parameters of assembled units, we supply inspection plug gauges, templates, and feeler gauges. These tools allow for prompt verification of thread and taper conformity to ISO/DIN standards directly at the installation site.
Supply of Stauff Hydraulic Components from EV Group China
EV Group China is your direct supplier of original Stauff hydraulic components and related metal products in the CIS market. We provide engineers and purchasers with access to a full product catalog, including fittings, pipe clamps, filters, and diagnostic equipment.
For technical consultation, selection of components for your project, or a commercial offer request, please contact our engineering and technical department via the form on the website or using the provided contacts. We guarantee product authenticity and efficient logistics.