Introduction to Eaton Hydraulic Filtration Solutions
Hydraulic fluid is often described as the “lifeblood” of hydraulic machinery, transferring power essential for operation. However, contamination within these fluids represents a significant threat to efficiency and productivity. Industry data suggests that over 80% of all hydraulic system failures are attributed to contaminated fluids, leading to component wear, pump failure, and costly downtime.
Eaton Hydraulic Filters are engineered to address these challenges by providing superior contamination control. Whether for mobile equipment like excavators or stationary industrial machinery, Eaton’s filtration technology ensures systems operate reliably, economically, and with extended maintenance intervals. Purecowater, as a distributor for premier filtration brands, offers these solutions to tackle your toughest solid and liquid filtration problems.
The Importance of Filtration Media
The core of any hydraulic filter is the media used to trap contaminants. Eaton offers a variety of filter materials tailored to specific cleanliness requirements and fluid types. Choosing the right media is critical for achieving the target ISO cleanliness code.
| Media Type | Filtration Method | Characteristics | Typical Micron Ratings |
|---|---|---|---|
| Glass Fiber Fleece (VG) | Depth Filtration | High dirt-holding capacity; depth structure captures fine particles; compatible with mineral oils and emulsions. | 4 µm – 25 µm |
| Stainless Steel Wire Mesh (G) | Surface Filtration | Robust surface filtration; partially cleanable; excellent chemical and thermal resistance. | 25 µm – 80 µm |
| Paper (P) | Depth Filtration | Resin-reinforced cellulose fibers; high burst strength; cost-effective solution. | 10 µm |
Product Series Overview by Pressure Class
Eaton’s extensive portfolio covers low, medium, and high-pressure applications, as well as return-line and off-line filtration systems.
1. Low Pressure Filters (Up to 1,450 PSI / 100 Bar)
Designed for suction, pressure, or return lines, these filters handle high flow volumes and are often used in lubrication systems or auxiliary circuits.
- Series LF & LWF: In-line filters with side inlets and bottom outlets. Available in carbon steel.
- Series DU: Versatile pressure filters designed according to AD2000 standards. Suitable for continuous operation with high dirt load monitoring.
- Series DWF: Double filter designs allowing for continuous operation during element change-outs.
2. Medium Pressure Filters (1,450 – 2,900 PSI / 100 – 200 Bar)
These filters bridge the gap between standard return lines and critical high-pressure components, offering robust protection in compact housings.
- Series DA: Continuous operation filters mounted in pressure or return lines.
- Series ML: Lightweight and economical, threaded design for tight spaces.
- Series MDD: Duplex design with a three-way changeover valve, allowing element replacement without system shutdown—critical for continuous industrial processes.
3. High Pressure Filters (> 2,900 PSI / 200 Bar)
High-pressure filters are installed directly downstream of the pump or before sensitive components like servo valves to protect against catastrophic failure.
| Series | Max Pressure | Key Features |
|---|---|---|
| HPF | 4,568 psi (315 bar) | Manifold mounted with front access; visual/electrical differential pressure indicators. |
| HP3 | 6,000 psi (420 bar) | Available in sizes matching very high flow rates; in-line or flange mounting options. |
| EHP | 20,305 psi (1,400 bar) | Stainless steel construction for extreme pressure handling. |
Return Line and Tank Breather Filters
Maintaining the cleanliness of fluid returning to the reservoir and the air entering the tank is just as vital as pressure line filtration.
- Return Line Filters (TEF, TRS): Tank-top mounted filters that prevent contaminants generated during operation from entering the reservoir. Features include lightweight aluminum construction and easy element change-outs.
- Tank Breathers (NBF, BFD): Prevent airborne debris and moisture from entering the hydraulic tank as the fluid level changes. Moisture absorption elements (Silica gel) are available to prevent rust and oil degradation.
Key Benefits of Eaton Hydraulic Filters
- System Reliability: Protects pumps, valves, and actuators from abrasive wear.
- Reduced Maintenance Costs: High dirt-holding capacity extends the service life of filter elements.
- Versatility: Options available for mineral oils, synthetic fluids, and water-based emulsions.
- Monitoring: Clogging indicators (visual, electrical, or electronic) provide real-time status of filter health, preventing bypass and unscheduled stops.
Request a Quote
Purecowater can assist in sizing and selecting the correct Eaton filter housing and element for your hydraulic application. Whether you need a replacement element or a complete high-pressure assembly, our team is ready to help.