Introduction to Eaton LF 251-631 In-Line Filters
The Eaton LF 251-631 series represents a robust line of low-pressure in-line filters designed to handle working pressures up to 32 bar (464 PSI). Engineered for versatility, these units are critical components for maintaining fluid cleanliness in hydraulic and lubrication systems. Whether deployed as suction filters, pressure filters, or return-line filters, the LF series ensures that pressure peaks are absorbed with a sufficient safety margin, protecting sensitive downstream components.
At Purecowater, we supply these high-performance filtration solutions to help industries tackle solid and liquid contamination challenges effectively. The LF 251-631 series is known for its high intrinsic stability and excellent filtration capability, making it a reliable choice for demanding industrial environments eaton.com.
Key Features and Design
The LF series housing is constructed from durable EN-GJS-400-18-LT material, designed to withstand rigorous operating conditions. The flow direction operates from outside to inside, utilizing a star-shaped, pleated filter element supported by a perforated core tube. This design maximizes the surface area for filtration, resulting in high dirt-retaining capacity and a long service life.
- Versatile Application: Suitable for use as suction, pressure, or return-line filters.
- Fluid Compatibility: Compatible with petroleum-based fluids, HW emulsions, water glycols, and most synthetic fluids.
- Maintenance Friendly: The stainless steel mesh elements are cleanable, while microglass elements offer finer filtration down to 5 μm(c).
Detailed Specifications
The LF 251, 401, and 631 models vary primarily in connection size, weight, and volume, allowing system designers to select the precise fit for their flow rate and piping requirements.
| Specification | Data |
|---|---|
| Max. Working Pressure | 32 bar (464 PSI) |
| Test Pressure | 64 bar |
| Operating Temperature | -10 °C to +100 °C |
| Housing Material | EN-GJS-400-18-LT |
| Sealing Material | Nitrile (NBR) or Viton (FPM) |
| Process Connection | SAE-flange connection 3000 PSI |
Model Comparison: LF 251 vs. LF 401 vs. LF 631
| Model | Connection Size | Tank Volume | Approx. Weight |
|---|---|---|---|
| LF 251 | 1 ½” | 2.4 liters | 14 kg |
| LF 401 | 2″ | 3.6 liters | 21 kg |
| LF 631 | 2 ½” | 5.3 liters | 29 kg |
Filter Element Technology
The performance of the Eaton LF series relies on its high-quality filter elements. Depending on the level of cleanliness required, users can choose between different filter materials:
- Stainless Steel Wire Mesh (G): Ideal for surface filtration. These elements are partially cleanable and offer high resistance in various fluids. Available ratings include 25 μm, 40 μm, and 80 μm.
- Microglass (VG): Designed for depth filtration where finer retention is necessary (finer than 40 μm). These disposable elements ensure superior cleanliness classes, available in ratings as fine as 5 μm(c) eaton.com.
Applications
Due to their rugged construction and adaptability, Eaton LF filters are utilized across a wide spectrum of industries. They are particularly effective in mobile and stationary hydraulic systems found in:
- Manufacturing machinery
- Marine and ship classifications (available upon request)
- Power generation equipment
- Petrochemical processing
Contact Purecowater
Ensuring your hydraulic systems run free of contamination is vital for maximizing equipment lifespan and reducing downtime. Whether you need the LF 251, LF 401, or LF 631, Purecowater can provide the technical expertise and inventory you need.
To learn more about the Eaton LF series or to request a quote, please visit our contact page below: