01NL.250.10VG.30EP filter element

The 01NL.250.10VG.30EP filter element is a precision-engineered filtration component designed for high-pressure 

hydraulic and lubrication systems. As an integral part of the pipeline series in fluid conveying media, this element 

is typically installed at the inlet filter of hydraulic systems, where it effectively removes metallic particles, abrasive contaminants,

 and colloidal impurities from the fluid stream. By doing so, it plays a critical role in protecting sensitive system 

components—such as pumps, servo-valves, actuators, and bearings—from premature wear and catastrophic failure.

In modern industrial operations, fluid contamination is one of the leading causes of equipment downtime and maintenance

 expense. The 01NL.250.10VG.30EP addresses this challenge by delivering consistent, high-efficiency filtration across a wide

 range of operating conditions. Its advanced media construction, robust mechanical design, and broad compatibility with

 various hydraulic fluids make it a versatile and reliable choice for demanding applications in metallurgy, petrochemicals, 

power generation, heavy machinery, and mobile equipment.

Advanced Media and Construction

The 01NL.250.10VG.30EP utilizes a composite filtering medium made from premium-grade imported glass fiber and stainless 

steel wire mesh. This combination offers exceptional filtration performance with distinct operational advantages:

· High dirt-holding capacity – The depth-loading glass fiber structure traps contaminants throughout the media thickness, 

rather than only on the surface, enabling extended service life.

· Low initial pressure drop – The porous design allows fluid to pass through with minimal resistance, reducing energy

 consumption and improving system efficiency.

· Excellent chemical and thermal stability – The media resists degradation from hydraulic fluids, water-glycol emulsions, 

and phosphate esters, ensuring reliable performance across diverse applications.

· Uniform pore structure – Consistent fiber distribution guarantees reliable particle capture efficiency and predictable 

filtration results.

Technical Parameters

The 01NL.250.10VG.30EP is engineered to meet rigorous industrial standards, with the following specifications:

Parameter Specification

Filtration accuracy 1 ~ 100 μm (grades available upon request)

Nominal working pressure 1 ~ 21 MPa (145 ~ 3,045 psi)

Working media General hydraulic oil, phosphate ester hydraulic fluid, oil-in-water emulsions, water-glycol fluids

Operating temperature -30°C ~ +110°C (-22°F ~ +230°F)

Bypass valve setting Optional, typically at 0.4 ~ 0.5 MPa differential pressure

Flow direction Inside-out or outside-in, depending on housing configuration

End caps Corrosion-resistant steel with epoxy bonding for pleat integrity

Sealing material Nitrile (NBR) or fluoroelastomer (FKM), compatible with specified fluids

Product Characteristics and Performance Benefits

The 01NL.250.10VG.30EP offers several distinctive advantages that translate directly into operational value:

1. Rapid achievement of target cleanliness levels – Thanks to its high-efficiency media, the system quickly reaches the 

desired ISO or NAS cleanliness class, reducing conditioning time during start-up and after maintenance.

2. Extended oil service life – By continuously removing degradation byproducts, moisture, and fine particulates, 

the filter slows down oil oxidation and additive depletion, effectively doubling or tripling oil change intervals in many

 applications.

3. Reduced bearing and component wear – The removal of sub-micron abrasive particles minimizes surface fatigue, pitting, 

and scuffing, extending the mean time between failures (MTBF) of pumps, motors, and cylinders.

4. Low maintenance footprint – The large circulation area and low pressure loss design reduce the frequency of element

 changes, lowering labor costs and disposal expenses.

5. Compact and lightweight structure – The space-saving design allows for easy installation in confined equipment layouts, 

making it ideal for both stationary industrial plant and mobile machinery.

6. Versatile application compatibility – The element performs reliably in both high-pressure main lines and low-pressure return 

lines, with flow capacities ranging from small-scale servo systems to large-volume circulation units.

Application Fields

The 01NL.250.10VG.30EP filter element serves a broad spectrum of industries, including:

1. Metallurgy – Hydraulic systems in rolling mills, continuous casting machines, and heavy lubrication units for gearboxes

 and bearings, where high-temperature and high-contaminant environments demand robust filtration.

2. Petrochemical & Refining – Separation and recovery of intermediate products, liquid purification in chemical reactors, 

and particle removal from oilfield produced water and natural gas streams. Also used in precision manufacturing such as tape, 

CD, and photographic film production.

3. Textile Industry – Polyester melt spinning purification and uniform filtration during drawing, as well as air compressor intake

 protection and compressed gas oil/water removal.

4. Thermal & Nuclear Power – Gas turbine lube oil systems, boiler feed pump recirculation, governor speed controls, bypass

 oil purification loops, and dust collection system filtration.

5. Mechanical Processing Equipment – Lubrication and compressed air purification for paper machinery, mining equipment,

 injection molding machines, large precision machine tools, and spray painting booth dust recovery.

6. Railway Diesel Engines & Generators – Lubricating oil and fuel oil filtration in high-speed diesel engines, ensuring reliable

 operation under variable load conditions.

7. Electronics & Pharmaceuticals – Pretreatment and polishing filtration for reverse osmosis (RO) and deionized water systems,

 as well as cleaning bath recirculation and glucose solution pre-filtration.

8. Automotive & Construction Machinery – Air, oil, and fuel filters for internal combustion engines; plus hydraulic oil filters,

 diesel pre-filters, and water separators for ships, trucks, excavators, and cranes.

Quality Assurance and Lifecycle Management

Each 01NL.250.10VG.30EP element undergoes strict quality control in accordance with ISO 9001 procedures. Every batch is

 tested for bubble-point integrity, burst pressure resistance, and flow-versus-pressure-drop characteristics. The optimized

 pleat geometry and multi-layer design provide a dirt-holding capacity of up to 35–45 grams per element, significantly 

extending service intervals. For critical installations, optional clogging indicators (visual/electrical) and bypass valves can be

 integrated to enable condition-based maintenance and prevent system starvation.

Frequently Asked Questions (FAQ)

Q1: What is the recommended replacement interval for the 01NL.250.10VG.30EP?

A: Replacement frequency depends on system contamination levels, operating pressure, and fluid type. As a general guideline, 

we recommend monitoring differential pressure (ΔP) across the element. Replace the element when ΔP reaches 80% of the

 bypass valve setting (typically 0.8–1.0 MPa for high-pressure applications). In clean industrial environments, this may be 6–12

 months; in heavy-duty or high-contaminant conditions, intervals may be shorter.

Q2: Can the filter element be cleaned and reused?

A: No. The glass fiber media is a depth-type, single-use filter. Backwashing, chemical washing, or compressed air blowing will 

damage the fiber structure, alter pore sizes, and reduce filtration efficiency. Reusing a cleaned element risks media migration 

and downstream contamination. Always replace with a new element.

Q3: What fluids is this element compatible with?

A: The standard sealing and media materials are compatible with mineral-based hydraulic oils, phosphate ester fluids, 

water-glycol mixtures, and oil-in-water emulsions. For aggressive synthetic fluids, high-water-content fluids, or fuels, 

please consult our technical team to select the appropriate seal (FKM, EPDM, etc.) and media variant.

Q4: What does "10VG" mean in the model designation?

A: The "10VG" typically indicates a nominal filtration rating of 10 micrometers with a glass fiber (VG) media type. The actual 

absolute rating (beta ratio) may be finer, depending on the specific element configuration. Please refer to the product datasheet

 for the precise beta ratio (βₓ) and efficiency value.

Q5: Can I use a finer micron element than specified to get "cleaner" oil?

A: While finer filtration (e.g., 3 μm vs. 10 μm) provides higher cleanliness, it also creates a higher pressure drop and may reduce 

element life. The optimal selection depends on system clearances—for servo-valve systems, 3–6 μm is often recommended; 

for general industrial hydraulics, 10–25 μm is typical. Using an overly fine element can cause premature clogging and bypass 

operation. Contact our application engineers for sizing guidance.

Q6: How do I identify genuine 01NL.250.10VG.30EP elements?

A: Genuine elements are marked with laser-etched part numbers, batch codes, and a quality certification label. Each element

 includes a test report showing bubble-point, burst pressure, and pressure-drop performance. We strongly recommend 

purchasing from authorized distributors or directly from the factory to avoid counterfeit products that may compromise system 

safety.

Q7: Is the bypass valve integrated or external?

A: This depends on the specific housing configuration. Some housing assemblies include an integrated bypass valve; 

the filter element itself may or may not contain one. Please specify your system requirements when ordering, and verify with 

your housing manufacturer whether the bypass is located in the filter head or within the element core.

Q8: What storage conditions are recommended for spare elements?

A: Store elements in a cool, dry, and dust-free environment, away from direct sunlight, ozone sources, and extreme 

temperatures. Keep them in their original sealed packaging until installation to prevent moisture absorption and contamination 

ingress.

For further technical assistance, custom dimensional modifications, or retrofitting advice, please contact our engineering

 support team. We are dedicated to delivering tailored filtration solutions that enhance your equipment reliability, reduce

 operational costs, and extend the service life of your hydraulic and lubrication systems.

Product details