Overview of the Eaton LF 63 In-Line Filter
The Eaton LF 63 is a robust in-line low-pressure filter designed to maintain the cleanliness and efficiency of hydraulic and lubrication systems. Engineered for versatility, this unit is suitable for working pressures up to 25 bar (approx. 363 psi) and is capable of safely absorbing pressure peaks during operation. Its design allows it to function effectively as a suction filter, pressure filter, or return-line filter, making it a critical component for diverse industrial applications [eaton.com].
Figure 1: Eaton LF Series Hydraulic Filter
Key Design Features
The LF 63 housing is constructed from high-grade aluminum casting with a steel filter cover, ensuring durability while maintaining a relatively low weight of approximately 2.5 kg. The internal filter element features a star-shaped pleated design, supported by a perforated core tube. This construction maximizes surface area for filtration, with flow directed from the outside to the inside.
- Versatile Application: Suitable for petroleum-based fluids, HW emulsions, water glycols, and most synthetic fluids.
- Safety Margins: Designed to absorb pressure peaks reliably.
- Maintenance: The filter cover is easily removable for element changeouts or cleaning (for wire mesh elements).
- By-pass Options: Integrated internal valves available to bypass flow if pressure differentials become too high.
Technical Specifications
Below are the primary technical data points for the LF 63 model. These specifications enable engineers and facility managers to determine suitability for specific hydraulic circuits.
| Parameter | Specification |
|---|---|
| Max. Operating Pressure | 25 bar |
| Test Pressure | 36 bar |
| Operating Temperature | -10 °C to +100 °C |
| Process Connection | G 3/4 (Thread DIN 3852 T2) |
| Housing Material | Aluminium-cast housing, Steel cover |
| Sealing Material | Nitrile (NBR) or Viton (FPM) |
| Tank Volume | 0.7 Liters |
| Measuring Connections | G 1/4 |
Filter Element Options
The performance of the LF 63 is largely dictated by the choice of filter element. Eaton offers various materials to suit different cleanliness requirements, ranging from coarse surface filtration to fine depth filtration [eaton.com].
1. Microglass (VG) – Depth Filtration
For applications where fine particle removal is critical, disposable microglass elements are recommended. These provide high dirt-holding capacity and excellent filtration capability.
- Ratings: Available in 3, 6, 10, 16, and 25 µm(c).
- Use Case: Ideal for protecting sensitive downstream components like servo valves.
2. Stainless Steel Wire Mesh (G) – Surface Filtration
These elements are cleanable and reusable, making them a cost-effective choice for coarser filtration needs.
- Ratings: Available in 25, 40, 80, and 130 µm.
- Note: While cleanable, mesh elements are not guaranteed to maintain 100% performance indefinitely after cleaning [eaton.com].
Flow Performance & Pressure Drop
Selecting the correct filter assembly involves calculating the pressure drop ($\Delta p$). The total pressure drop is the sum of the housing pressure drop and the element pressure drop. The element pressure drop is influenced by viscosity and flow rate.
Material Gradient Coefficients (MSK) for Size 63 Elements:
| Filter Material | MSK Factor (mbar/l/min) |
|---|---|
| 3VG (Microglass) | 3.441 |
| 6VG (Microglass) | 2.389 |
| 10VG (Microglass) | 1.530 |
| 25VG (Microglass) | 0.910 |
| 25G (Wire Mesh) | 0.0924 |
Ordering & Configuration
The LF 63 is highly configurable. When ordering or specifying this unit, the model code indicates the following options:
- Filter Material: VG (Microglass), G (Wire Mesh), or API standards.
- Sealing Material: Nitrile (Standard) or Viton.
- Clogging Indicators: Visual (AOR/AOC), Visual-Electric (AE), or Electronic (VS5) sensors can be integrated to monitor filter health.
- Bypass Valve: Options for standard bypass settings (e.g., $\Delta p$ 3.5 bar) or no bypass.
At Purecowater, we specialize in filtration solutions ranging from hydraulic systems to complex membrane processes. If you require sizing assistance, pricing, or replacement elements for the Eaton LF 63, our team is ready to assist.