Hydraulic Filtration Solutions
Hydraulic Filters, Filter Elements & Filtration Systems
Our hydraulic filtration portfolio covers filters, filter elements, and integrated filtration systems designed to protect hydraulic and lubrication circuits under demanding industrial operating conditions. With a wide range of configurations and verified performance, our solutions support system reliability, extended service life, and stable cleanliness control across diverse applications.
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Comprehensive Filtration Coverage:
Suction, return-line, pressure-line, inline, tank-mounted, duplex filters, air breathers, and complete filtration units for low-, medium-, and high-pressure hydraulic systems. - ✔
Engineered Filter Elements:
Cleanroom-manufactured filter elements with controlled filtration ratings, high dirt-holding capacity, and compatibility with mineral oils and common hydraulic fluids. - ✔
Flexible Brand Replacement Capability:
Designed as compatible and interchangeable alternatives to leading international hydraulic filter brands, supporting reliable performance with optimized cost efficiency.
How to Select the Right Hydraulic Filter
| Selection Factor | Engineering Consideration |
| Maximum Operating Pressure (Pmax) | The filter housing and internal structure must be rated to withstand the maximum system pressure under all operating and transient conditions. |
| Maximum Flow Rate (Qmax) | The filter should accommodate peak system flow without excessive pressure loss, ensuring stable operation and avoiding premature bypass activation. |
| Installation Location & Connection | Selection depends on installation position such as suction, pressure, return, or offline circuits, as well as required port size, flange, or threaded connection type. |
| Fluid Viscosity & Minimum Temperature | Oil viscosity (cSt) and minimum operating temperature influence cold-start behavior, pressure drop characteristics, and filter element loading. |
| Initial Pressure Drop (ΔP) | The clean-element pressure drop should remain within acceptable limits to maintain system efficiency and prevent unnecessary energy loss. |
| Required Oil Cleanliness Level (NAS) | The target cleanliness class is determined by the most sensitive system components, such as servo valves, proportional valves, or high-precision pumps. |
| Maintenance Mode | Consider whether filter elements must be replaced during operation, which determines the use of single or duplex (non-stop changeover) filter configurations. |
| Optional Accessories | Additional options may include diffusers, bypass valves, clogging indicators, pressure or vacuum switches, and electronic contamination transmitters. |
Engineering Note:
This table provides a general selection logic. Detailed sizing and configuration should be confirmed by our engineers.
Recommended Oil Cleanliness Levels for Different Hydraulic Systems
| Application Category | Required Cleanliness (ISO 4406:99) | Required Cleanliness (NAS 1638) | Recommended Filtration Rating |
| Contamination-Critical Hydraulic Systems | 16 / 12 / 9 | NAS 2 ~ 3 | βx(c) ≥ 200, KN1 μm |
| Servo & CNC Machine Tool Hydraulic Systems | 18 / 13 / 10 | NAS 4 ~ 6 | βx(c) ≥ 200, KN3 μm |
| Proportional Valve Hydraulic Systems | 19 / 14 / 11 | NAS 5 ~ 6 | βx(c) ≥ 200, KN5 μm |
| Construction Machinery & Metallurgical Rolling Equipment | 20 / 16 / 13 | NAS 7 ~ 9 | βx(c) ≥ 200, KN10 μm |
| Heavy Equipment & Mobile Machinery Hydraulic Systems | 21 / 17 / 14 | NAS 9 ~ 11 | βx(c) ≥ 200, KN20 μm |
*Disclaimer: All brand names and trademarks mentioned (including but not limited to PALL®, HYDAC®, MAHLE®, INTERNORMEN®, and EPE®) are the property of their respective owners.
Our products are engineered as compatible and interchangeable alternatives and are not manufactured by, affiliated with, or endorsed by the original trademark holders.
All references to third-party brands are provided solely for technical identification and compatibility guidance.
Verified Compatibility with International Brands
Our filter elements are designed and tested to match the performance requirements of leading international hydraulic filter brands.
Comprehensive laboratory testing covers filtration efficiency, dirt-holding capacity, oil compatibility, and high-temperature resistance,
ensuring reliable performance in demanding industrial applications.
| Reference Brand | Compatibility Scope | Performance Level |
|---|---|---|
| PALL® | Hydraulic filter elements | Comparable filtration efficiency & service life |
| HYDAC® | Pressure & return-line elements | Verified by in-house testing |
| MAHLE® / INTERNORMEN® | Standard industrial cartridges | Meets industrial application requirements |
| EPE® | Hydraulic system filter elements | Stable performance in harsh environments |
Typical Applications
Construction & Mobile Hydraulic Systems
High contamination risk · Variable load · Outdoor operation
Hydraulic filtration solutions designed for excavators, loaders, cranes, and other mobile equipment operating in dusty, humid, and high-vibration environments, ensuring reliable protection of pumps and control valves.
Recommended Filtration Configuration:
- Suction and return-line filters for full system protection
- Duplex or spin-on filters for continuous operation without shutdown
- High-efficiency filter elements with βx(c) ≥ 200 for critical components
- Optional bypass valves and contamination indicators for early warning
Industrial Machinery & Metalworking
Continuous operation · High flow rates · Sensitive components
Filters protect presses, CNC machines, rolling mills, and production lines, maintaining stable oil cleanliness to avoid downtime and prolong component life.
Recommended Filtration Configuration:
- Return-line and pressure-line filters for pump and valve protection
- High-efficiency filter elements with βx(c) ≥ 200
- Optional bypass and contamination indicators for sensitive systems
- Regular monitoring and maintenance schedule advised
Power Generation & Energy Systems
High reliability · Continuous operation · Critical components
Hydraulic and lubrication circuits in turbines, generators, and auxiliary systems require robust filtration to ensure long-term stable operation and prevent contamination-related failures.
Recommended Filtration Configuration:
- Pressure-line and return-line filters for sensitive pumps and valves
- High-temperature resistant filter elements for hot oil circuits
- Continuous online monitoring and bypass filters if needed
- Periodic replacement based on ISO cleanliness targets
Transportation & Heavy Vehicles
High load cycles · Harsh environments · Variable oil quality
Filters for trucks, buses, and off-road vehicles protect hydraulic circuits under heavy loads and abrasive conditions, ensuring extended service intervals and consistent performance.
Recommended Filtration Configuration:
- Suction and return-line filters for full circuit protection
- Duplex filters for uninterrupted operation during maintenance
- Contamination indicators and bypass valves for early detection
- High dirt-holding capacity elements for long service life
Engineering Confidence & Replacement Capability
Engineering Certification & Quality Assurance
Our filtration products are manufactured under a certified quality management system,ensuring consistent production control, traceability, and repeatable performance across different product series.
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ISO 9001 Certified Quality Management System: - Covers design, manufacturing, inspection, and final release processes.
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Controlled Manufacturing & Process Consistency: - Standardized procedures ensure stable filtration performance and dimensional consistency.
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Traceability & Batch Control: - Raw materials, filter media, and finished products are traceable throughout production.
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Internal Testing & Quality Verification: - Key performance indicators are verified prior to shipment to ensure compliance with defined specifications.
*Certification Notice:
ISO 9001 certification applies to the manufacturer’s quality management system and does not
imply certification of individual products unless otherwise specified.
Replacement Capability & Engineering Confidence
Our hydraulic filtration solutions are engineered to serve as functionally equivalent alternatives to widely used international filter designs, supporting reliable interchangeability while maintaining system safety and operational stability.
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Function-Oriented Replacement Logic: - Compatibility is determined by filtration efficiency, pressure rating, flow capacity, cleanliness targets, and installation interfaces — not by brand labeling.
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System-Based Engineering Assessment: - Each replacement recommendation is evaluated against actual operating conditions, component sensitivity, and contamination control requirements.
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Performance Alignment & Verification: - Filter elements and assemblies are internally tested and aligned with commonly referenced international filtration standards to ensure consistent results.
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Cost & Supply Chain Optimization: - Engineered alternatives help reduce procurement costs and lead
- times while maintaining long-term system reliability.
Technical FAQ – Filtration Selection & Replacement
Q1: How do I select the appropriate filtration grade for my hydraulic system?
Filtration grade selection depends on system sensitivity, operating pressure, and contamination tolerance of critical components.
For most hydraulic systems, return-line filtration in the 10–25 μm range is sufficient, while pressure-line filters with higher efficiency are recommended for protecting pumps and servo or proportional valves.
Q2: Where should filters be installed in a hydraulic circuit?
Filters are typically installed at key positions in the system, including suction lines, pressure lines, return lines, and reservoir breathers. The correct configuration depends on system layout, cleanliness targets, and maintenance strategy, rather than a single fixed rule.
Q3: Can your filters replace existing filter housings or elements in installed systems?
Yes. Our filtration products are designed with dimensional compatibility and standardized connection options in mind, allowing them to be applied as functional replacements in many retrofit or upgrade projects. Replacement suitability is evaluated based on size, flow rate, pressure rating, and operating conditions.
Q4: What factors influence filter service life?
Filter service life is affected by contamination level, oil cleanliness, flow conditions, and operating temperature.
High dirt-holding capacity elements and proper filter positioning help extend service intervals and reduce maintenance frequency.
Q5: Are your filter elements suitable for high-temperature hydraulic or lubrication systems?
Yes. We offer filter elements specifically designed for high-temperature applications, with stable performance up to 150 °C. These elements use temperature-resistant filter media and sealing materials, making them suitable for hot oil circuits, power generation systems, and industrial processes where elevated operating temperatures are common.
