Industrial valves · Гидравлические фильтры Stauff
STAUFF Filtration Systems for Hydraulics: Technical Overview and Classification
STAUFF is a key German engineering center and manufacturer of high-tech components for hydraulic and lubrication systems. The brand's products are integrated into critically important units of industrial equipment in mechanical engineering, heavy metallurgy, energy, and transport industries. The main task of STAUFF components is to ensure the required cleanliness class of the working fluid by removing solid mechanical particles, oxidation products, and moisture, which directly affects the service life and reliability of hydraulics.
Engineering Advantages of STAUFF Filtration Systems for Industrial Hydraulics
STAUFF engineering solutions represent a modular ecosystem that provides comprehensive multi-stage filtration of the hydraulic flow — from the reservoir to the executive hydraulic units.
Key operational characteristics of STAUFF filters:
- The 4PRO Glass Fibre filter material technology guarantees maximum dirt-holding capacity and durability, confirmed by multi-pass tests according to ISO 16889, demonstrating high βx(c)-stability.
- The stability of filtration performance is maintained even during peak pressure surges and sharp temperature gradients, preventing the release of previously captured particles.
- Optimized flow hydrodynamics minimizes the pressure drop (ΔP) across the filter element, which reduces energy losses in the hydraulic circuit during round-the-clock industrial cycles.
- Full interchangeability of replaceable elements with products from other manufacturers, compliant with international standards for hydraulic lines, simplifies maintenance.
- Availability of specialized software for precise filter selection, considering the viscosity of the working medium, flow rate, temperature conditions, and the required cleanliness class according to ISO 4406.
Typology and Key Parameters of STAUFF Hydraulic Filters
To ensure maximum reliability and durability of hydraulic systems, EV Group China supplies a full range of STAUFF filtration equipment:
- Pressure Filters: Mounted in pressure lines after the pump to protect high-precision components such as servo valves, hydraulic distributors, and executive mechanisms from particles generated by the pump.
- Return Line Filters: Integrated into drain lines to capture wear products from system components (e.g., hydraulic motors, cylinders) before they enter the hydraulic tank.
- Spin-on Filters: Compact, easily replaceable elements for suction and return lines operating at low and medium pressures, providing quick replacement without disassembling the housing.
- Bypass (off-line) Systems: Provide continuous ultra-fine filtration of a small flow of working fluid in an autonomous circuit to achieve and maintain high cleanliness classes (up to 15/13/10 according to ISO 4406) in large volumes of oil.
- Mobile Filtration Units: Autonomous units for conditioning hydraulic fluids: filling new systems, cleaning existing circuits, and transferring oil with simultaneous filtration.
| Filter Type | Operating Pressure (max.) | Structural Elements | Materials of Manufacture |
|---|---|---|---|
| Pressure filter | Up to 160–420 bar | Housing, replaceable filter element, visual/electrical clogging indicator | High-strength steel, ductile iron, aluminum; NBR/FKM (Viton) seals |
| Return line filter | 6.9–25 bar | Housing (RFB/RTF/RF series), replaceable elements | Polyamide, glass fiber reinforced; steel; aluminum; filter paper |
| Spin-on filters | Up to 14 bar | Adapter head, replaceable filter element in steel housing (Spin-on) | Aluminum, stainless steel mesh, glass fiber, cellulose |
| Autonomous/Bypass | Depends on the pump | Motor-pump unit, filter housing, hoses | Anodized aluminum, cellulose, synthetic fibers |
Multi-layer Filter Elements:
- Wire Mesh: Stainless steel (AISI 304/316) for coarse filtration (25-250 µm) and protection against large particles, often used in suction filters.
- Inorganic Glass Fiber: Provides fine filtration (from 3 µm) with high efficiency (βx(c) ≥ 1000) and maximum dirt-holding capacity.
- Polyester Fiber: Resistant to tears and material fatigue, ideal for water-glycol emulsions (HFC/HFA) and ensures a uniform flow profile.
- Cellulose: Specialized resin-impregnated paper for economical and effective filtration of mineral oils.
Comprehensive Supply of STAUFF Components from EV Group China
EV Group China, as an expert supplier, provides not only filters and replaceable elements but also the entire range of related STAUFF equipment for installing hydraulic systems. Our assortment includes: pipe clamps and supports, precision fittings, flange connections, ball valves, and diagnostic equipment. For technical consultation on equipment selection and to receive a commercial offer, please contact the engineering department of EV Group China.