P821575 Filter Element – Versatile High-Performance Hydraulic Filtration Solution

1. Product Overview

The P821575 filter element is an essential component in pipeline-type hydraulic and fluid transmission systems.

 Typically installed at the inlet end of hydraulic filters, it removes metal particles, contamination impurities, 

and other harmful substances from fluid media, protecting pumps, valves, actuators, and other critical equipment from 

premature wear and failure.

The filtration process is straightforward: fluid enters the filter housing, passes through the filter element where contaminants

 are trapped on the media surface, and clean filtrate is discharged from the outlet. When cleaning is required, the element 

can be easily removed from the housing, treated with industrial cleaning fluid, and reinstalled—offering flexibility for 

maintenance schedules.

Engineered for direct interchangeability with original specifications, the P821575 features precisely matched dimensions,

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

Please note: Aite is an independent manufacturer and not an authorized distributor of the original brand. Our replacement

 elements are engineered to meet or exceed original performance specifications at a competitive price point.

2. Technical Specifications

Parameter Specification

Model Number P821575

Filtration Precision 1 ~ 25 μm (multiple ratings available)

Working Medium Acid hydraulic oil, emulsion, water-glycol, and general hydraulic fluids

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

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

Filter Media Options – BN: Glass fiber filter paper – W: Stainless steel woven mesh – P: Wood pulp filter paper – V: Stainless steel

 sintered mesh

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

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

Flow Fatigue Compliance Verified per ISO 3724/76

Beta Ratio βₓ ≥ 200 (ISO 16889)

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 housings.

3. Key Features and Advantages

Feature Benefit

Multiple media options Choose from glass fiber (BN), stainless steel woven mesh (W), wood pulp (P), or sintered mesh

 (V)—tailored to your specific fluid and application requirements.

High structural strength Available in 1.0, 2.0, 16.0, and 21.0 MPa ratings to match system pressure demands, ensuring reliable

 performance under varying loads.

Excellent flow characteristics Large circulation area with minimal pressure loss reduces energy consumption and maintains

 system efficiency.

Compact & lightweight Simple, space-saving structure facilitates easy installation and maintenance.

Convenient maintenance Cleanable design allows removal, treatment with industrial fluid, and reinstallation—reducing

 replacement frequency and operating costs.

High fatigue resistance Complies with ISO 3724/76 hydraulic filter flow fatigue verification—solid filter material support on both 

sides ensures stability under cyclic pressure loads.

Broad compatibility Suitable for acid hydraulic oil, emulsions, water-glycol, and general hydraulic fluids.

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

high-temperature environments.

Cost-effective alternative 40–60% savings over genuine parts, with equivalent or superior performance.

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

4. Media Selection Guide

Media Code Material Recommended Applications

BN Glass fiber paper General hydraulic oil, high-efficiency particle removal, extended service life

W Stainless steel woven mesh High-flow applications, washable/reusable, coarse filtration

P Wood pulp paper Standard industrial filtration, cost-effective, disposable

V Stainless steel sintered mesh High-pressure systems, extreme temperatures, aggressive fluids, cleanable

Select the appropriate media based on your system's fluid type, pressure requirements, and maintenance preferences.

5. Application Fields

The P821575 filter element is widely used across multiple industries due to its versatility and reliable filtration performance:

Industry Specific Applications

Hydraulic Systems Pressure oil filtration in hydraulic and lubrication circuits to remove contaminants and ensure normal 

operation

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

Petrochemical Filtration of process liquids, hydraulic fluids, and lubrication systems in refining and chemical production

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

 lubrication

Power Generation Turbine lubrication, speed control systems, bypass control oil purification

Marine & Offshore Ship hydraulic systems, steering gear filtration, deck machinery lubrication

Construction & Mining Hydraulic oil filtration for excavators, loaders, dump trucks, and heavy equipment

6. Selection & Operation Guidelines

6.1 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)

6.2 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.

6.3 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.

6.4 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: Can the P821575 filter element be cleaned and reused?

A: Yes—depending on the media type. Stainless steel woven mesh (W) and sintered mesh (V) elements are cleanable and reusable. 

Glass fiber (BN) and wood pulp (P) elements are typically disposable and should be replaced rather than cleaned. For cleanable 

elements, use approved industrial cleaning fluids and follow our recommended cleaning procedures. Consult our technical team

 for specific guidance.

Q2: What is the recommended replacement interval for the P821575?

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

(or clean) 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.

Q3: Which filter media should I choose for my application?

A: Choose based on your system requirements:

· BN (glass fiber) : For high-efficiency particle removal in general hydraulic systems.

· W (stainless steel mesh) : For washable/reusable applications with coarse filtration needs.

· P (wood pulp) : For cost-effective disposable filtration in standard industrial systems.

· V (sintered mesh) : For high-pressure, high-temperature, or aggressive fluid applications requiring maximum durability.

Q4: How do I confirm compatibility with my existing 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 P821575 follows original specifications for 1:1 interchangeability—no housing modifications 

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

Q5: What is the difference between your P821575 and the original brand element?

A: Our element is manufactured using equivalent high-quality media (glass fiber, woven mesh, wood pulp, or sintered mesh) and

 premium sealing materials, meeting or exceeding original performance specifications—validated by ISO 16889 multi-pass testing

 and ISO 3724/76 flow fatigue verification. It offers reliable filtration performance at 40–60% cost savings with faster delivery times.

Q6: What does "structural strength" mean and which rating do I need?

A: Structural strength refers to the maximum differential pressure the element can withstand without collapse. Select 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. Choose based on your system's maximum working pressure.

Q7: Can this filter element handle acid hydraulic oil or water-glycol fluids?

A: Yes. The P821575 is compatible with acid hydraulic oils, emulsions, water-glycol, and general hydraulic fluids. For aggressive

 fluids, we recommend selecting stainless steel sintered mesh (V) media and FKM seals for maximum chemical resistance. 

Please specify your working medium when ordering.

Q8: Why does this element comply with ISO 3724/76 flow fatigue testing?

A: ISO 3724/76 verifies the element's ability to withstand cyclic flow and pressure fluctuations without structural failure. 

Our P821575 is tested and verified for flow fatigue resistance—solid filter material support on both sides ensures stability under

 alternating pressure loads, preventing media delamination or collapse.

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 DP monitoring and timely replacement/cleaning are essential.

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,

 ISO 3724/76 flow fatigue verification, 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 P821575 in stock?

A: Yes. This is one of our popular 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. The P821575 series is available in 1–25 μm absolute ratings, with NBR (standard) or FKM (high-temperature/aggressive

 fluids) seals. We also offer custom media combinations and branded labeling 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 P821575 filter element is a versatile, high-performance filtration solution that effectively removes metal particles and 

contamination impurities from hydraulic and fluid transmission systems. With multiple media options (glass fiber, stainless steel 

woven mesh, wood pulp, and sintered mesh), flexible structural strength ratings, broad fluid compatibility, and ISO 3724/76 flow

 fatigue verification, it is an excellent choice for metallurgy, petrochemicals, mechanical processing, power generation, and many 

other industries. Backed by cleanable/reusable options, 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.