TFBX-70x20 – High-Performance Liming Replacement Filter Element for Hydraulic Systems

1. Product Overview

In hydraulic systems, maintaining fluid cleanliness is critical to ensuring reliable equipment operation and extending 

component life. The TFBX-70x20 Liming oil filter element is specifically designed to remove solid particles, metal wear debris, 

and colloidal substances from hydraulic fluid, effectively controlling contamination levels and protecting pumps, valves,

 actuators, and other system components from premature wear and failure.

Manufactured with high-quality glass fiber media, this replacement element delivers consistent filtration performance across 

demanding industrial applications. It is engineered for direct interchangeability with original Liming specifications—same

 dimensions, sealing interfaces, and thread types—enabling drop-in installation without housing modifications. Whether

 deployed in metallurgical plants, petrochemical facilities, or power generation stations, the TFBX-70x20 ensures your hydraulic 

systems operate with clean, reliable fluid.

Please note: Aite is an independent manufacturer and not an authorized Liming distributor. Our replacement elements meet or 

exceed original performance specifications at a competitive price point.

2. Technical Specifications

Parameter Specification

Model Number TFBX-70x20

Filtration Precision 20 μm (absolute)

Filtration Ratio βₓ ≥ 100 (ISO 16889)

Working Medium General hydraulic oil, phosphate ester fluid, emulsion, water-glycol

Operating Temperature Range –30°C ~ +110°C

Working Pressure Range 21 ~ 210 bar (2.1 ~ 21 MPa)

Structural Strength Ratings 1.0 / 2.0 / 16.0 / 21.0 MPa (selectable based on application)

Filter Media High-performance glass fiber

Seal Material FKM (fluororubber) / NBR (butyl rubber) – optional

Beta Ratio Compliance ISO 16889 multi-pass testing

Flow Direction Outside-in

All geometric dimensions—outer diameter, inner bore, height, and thread—are verified with CMM inspection to ensure 100%

 interchangeability with original Liming housings.

3. Key Features and Advantages

Feature Benefit

High-efficiency particle removal 20 μm absolute filtration with β₂₀ ≥ 100 effectively captures metal debris, rubber particles, 

and colloidal contaminants, protecting critical system components.

High dirt-holding capacity Optimized glass fiber media structure retains significant contaminants without premature pressure

 rise, extending service life and reducing replacement frequency.

Broad fluid compatibility Suitable for general hydraulic oil, phosphate esters, emulsions, and water-glycol fluids across diverse 

industrial applications.

Wide temperature tolerance Stable performance from –30°C to +110°C ensures reliable operation in both cold-start and 

high-temperature environments.

Multiple structural strength options Available in 1.0, 2.0, 16.0, and 21.0 MPa ratings—select the appropriate grade for your 

system's pressure requirements.

Flexible seal selection NBR for standard mineral oils; FKM for phosphate esters, high-temperature (>100°C), or aggressive fluids.

Cost-effective alternative 40–60% savings over genuine Liming parts, with equivalent or superior performance validated by ISO 

16889 testing.

Complete documentation EN 10204 Type 2.1 material certificates and performance test reports included with every shipment.

4. Application Fields

The TFBX-70x20 filter element is widely used across multiple industries due to its versatility and reliable filtration performance:

Industry Specific Applications

Metallurgy Rolling mill hydraulic systems; continuous casting machine hydraulic stations; lubrication equipment filtration

Petrochemical Separation and recovery of products and intermediate products in refining and chemical production processes

Textile Polyester melt purification and uniform filtration during drawing; air compressor protection filtration

Mechanical Processing Paper machinery, mining equipment, injection molding machines, and large mechanical equipment 

lubrication systems

Railway & Marine Locomotive and marine engine lubricating oil filtration; ship hydraulic systems

Automotive & Construction Hydraulic oil filters for construction machinery, trucks, and heavy vehicles; engine oil and fuel

 filtration

Thermal & Nuclear Power Gas turbine and boiler lubrication systems; speed control systems; bypass control system oil 

purification

Our filters are compatible with mineral hydraulic oils (HL, HM, HV), phosphate esters, synthetic esters, emulsions, and 

water-glycol fluids. We also offer matched vacuum oil purifiers for full-cycle oil maintenance—from filtration to dehydration

 and degassing.

5. Selection & Operation Guidelines

5.1 Structural Strength Selection Guide

Choose the appropriate structural strength rating based on your system's maximum operating pressure:

Rating Recommended For

1.0 MPa Low-pressure return lines and light-duty systems

2.0 MPa General medium-pressure circuits

16.0 MPa High-pressure industrial hydraulic systems

21.0 MPa Heavy-duty high-pressure systems (mining, metallurgy, heavy machinery)

5.2 Replacement Indication

Monitor the differential pressure gauge. Replace when DP reaches the alarm value—typically 0.35–0.5 MPa above initial clean

 pressure drop. Under typical industrial conditions, replacement every 6–12 months or after 3,000–5,000 operating hours is 

common. Shorten intervals for high-contamination environments.

5.3 Storage Conditions

Store unused elements in original packaging in a cool, dry, dust-free environment. Avoid direct sunlight, extreme temperatures,

 and corrosive chemicals. Recommended storage: <40°C and <80% relative humidity.

5.4 Disposal

Used elements may contain hazardous contaminants. Follow local environmental regulations—drain oil and dispose as 

industrial hazardous waste or through authorized recycling channels.

Frequently Asked Questions (FAQ)

Q1: What is the recommended replacement interval for the TFBX-70x20 filter element?

A: The interval depends on operating conditions and contamination levels. Monitor the differential pressure gauge—replace 

when DP reaches 0.35–0.5 MPa above initial clean pressure drop. Under typical industrial conditions, replacement every 6–12 

months or after 3,000–5,000 operating hours is common. Shorten intervals for high-contamination environments.

Q2: Can this filter element be cleaned and reused?

A: No. This element is designed for single-use only. Cleaning may damage the glass fiber media, reduce filtration efficiency, 

and cause media migration—leading to secondary contamination of the hydraulic system. Always replace with a new element.

Q3: How do I confirm compatibility with my existing Liming filter housing?

A: Check the model number on your existing element and compare dimensions (outer diameter, inner diameter, length), 

seal type, and bypass valve setting. Our TFBX-70x20 follows original Liming specifications for 1:1 interchangeability—no housing

 modifications required. Our technical team can assist with cross-referencing.

Q4: What is the difference between your TFBX-70x20 and the original Liming element?

A: Our element is manufactured using equivalent high-quality glass fiber media and premium sealing materials, meeting or 

exceeding original performance specifications—validated by ISO 16889 multi-pass testing with β₂₀ ≥ 100. It offers reliable

 filtration performance at 40–60% cost savings with faster delivery times.

Q5: What does the filtration ratio "βₓ ≥ 100" mean?

A: Beta ratio (βₓ) measures filtration efficiency. β₂₀ ≥ 100 means that for every 100 particles larger than 20 microns entering the

 filter, 99 or more are captured—equivalent to ≥99% efficiency. This ensures effective removal of harmful contaminants at the

 rated particle size.

Q6: Which structural strength rating should I choose for my application?

A: Select based on your system's maximum working pressure. Use 1.0 MPa for low-pressure return lines, 2.0 MPa for 

medium-pressure circuits, 16.0 MPa for high-pressure industrial systems, and 21.0 MPa for heavy-duty high-pressure applications

 such as mining or metallurgy. Consult our technical team for assistance.

Q7: Why does the TFBX-70x20 use glass fiber media?

A: Glass fiber media offers superior particle capture efficiency, high dirt-holding capacity, and excellent chemical compatibility 

compared to cellulose or synthetic media. It maintains consistent filtration performance across a wide temperature range and

 resists degradation from hydraulic fluid additives.

Q8: Can this filter element handle high-viscosity or phosphate-ester fluids?

A: Yes. The TFBX-70x20 is compatible with various hydraulic fluids, including high-viscosity oils and phosphate esters. 

For phosphate esters or high-temperature (>100°C) applications, FKM seals are required—please specify your working medium

 when ordering.

Q9: Does this element have an integrated bypass valve?

A: The bypass valve is typically installed in the filter housing rather than in the element itself. Some variants include an integrated 

bypass; others are non-bypass designs. Please verify your system requirements before ordering. Our team can assist in selecting 

the correct configuration.

Q10: What are the consequences of running a system with a clogged filter element?

A: A clogged element increases differential pressure, which may open the bypass valve (if equipped), allowing unfiltered oil to 

circulate and accelerate component wear. If no bypass is present, the pressure drop may cause filter collapse or system starvation. 

Regular monitoring and timely replacement are essential to protect critical components.

Q11: Can I use this element in a suction line application?

A: This element is generally designed for pressure line or return line applications. For suction line applications, a different filter 

design with lower pressure drop and higher flow capacity is typically required. Please consult our engineering team for specific 

recommendations.

Q12: Can you supply test certificates for export and customs clearance?

A: Yes. Every shipment includes EN 10204 Type 2.1 material certificates, ISO 16889 multi-pass filtration performance test reports, 

and factory inspection documents. Upon request, we can provide Type 3.1 third-party inspection or surveyor reports 

(additional cost applies), meeting EU, ASEAN, Middle Eastern, and South American import requirements.

Q13: Do you keep the TFBX-70x20 in stock?

A: Yes. This is one of our popular Liming replacement models and is always well-stocked. Trial orders (1–10 pcs) ship within 3–7 

working days; bulk orders (500+ pcs) within 15 working days. Expedited airfreight is available for urgent breakdowns.

Q14: Do you offer elements with different micron ratings or seal materials?

A: Yes. While the TFBX-70x20 is standard at 20 μm with NBR seals, we offer absolute ratings of 1, 3, 5, 10, 25, and 100 microns,

 and FKM seals for high-temperature/aggressive fluids. Custom end-cap designs and branded labeling are also available for 

OEM/distributor orders. Please specify your requirements when ordering.

Q15: Do you provide technical support for installation or troubleshooting?

A: Yes. Our in-house engineers have 15+ years of hydraulic filtration experience. We provide free dimensional drawings,

 installation guides, and remote video troubleshooting. For large projects, on-site commissioning support can be arranged

 (subject to travel conditions).

Conclusion

The TFBX-70x20 Liming replacement filter element is a reliable, high-performance filtration solution that effectively removes 

solid particles, metal wear debris, and colloidal contaminants from hydraulic fluids. With its high-quality glass fiber media, 

broad fluid compatibility, wide temperature tolerance, and multiple structural strength options, it is an excellent choice for 

metallurgy, petrochemicals, textile manufacturing, mechanical processing, power generation, and many other industries. 

Backed by flexible seal selection, fast delivery, complete documentation, and competitive pricing, this replacement element

 offers outstanding value for maintaining system cleanliness and operational reliability.

For cross-reference charts, technical datasheets, or a customized quotation, please contact our sales engineering team today. 

We keep your hydraulic systems running—reliably, safely, and cost-effectively.

Product details