Hydraulic Oil Filter Element – Model P135

A high-precision hydraulic oil filter element supplied by AIRPURE (Xinxiang Airpure Filter Co., Ltd.), built around imported glass-fiber media and engineered as a direct replacement for various OEM hydraulic filter cartridges across construction machinery, industrial hydraulic equipment, agricultural machinery, automotive hydraulics, marine systems, and other demanding circuits . The "P" in P135 denotes glass-fiber / filter-paper media (consistent with the MASUDA coding convention seen in your earlier queries), while "135" is the manufacturer's element model designation rather than a dimensional code. The P135 is typically specified at 10–15 µm nominal filtration with 98 % filtration efficiency and a 2000-hour service life in standard hydraulic oil applications .

Key Features

• Imported glass-fiber media — high tensile strength, temperature-resistant, corrosion-proof, non-combustible, with excellent insulation properties

  
  

• 5× filtration area vs. standard cartridges — pleated construction increases effective surface area, boosting dirt-holding capacity and extending service intervals

  
  

• Filtration efficiency ≥ 98 % (βₓ ≥ 100 per multipass testing) — captures solid particles, impurities, and abrasive debris that cause pump/valve wear

  
  

• Low initial differential pressure — ≤ 0.02 MPa at rated flow, minimizing pump suction load

  
  

• Integrated bypass valve — opens at 0.3–0.35 MPa (3.0–3.5 bar) to protect the system if the element clogs

  
  

• Burst pressure ≥ 0.7 MPa (up to 21–210 bar collapse rating depending on configuration)

  
  

• Laser-cut and laser-welded — precise dimensional accuracy, no fraying, weld joints are leak-tight and won't separate under vibration

  
  

• Fiber stability — even under intense vibration, media fibers will not shed into the hydraulic circuit

  
  

• Full ISO test suite: ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968 / 16889

  
  

Technical Specifications

* Exact OD, length, ID, and end-cap pattern are defined by the mating filter housing — confirm against your existing element before ordering. The P135 is supplied as a customizable replacement cartridge; dimensions follow the host equipment's original element.

Application Guidance

The P135 is a universal-replacement hydraulic oil filter element — AIRPURE states it can replace different brands of filter cartridges and can be customized to different models . Primary deployment:

• Construction machinery — excavators, loaders, cranes, bulldozers

  
  

• Industrial equipment — hydraulic presses, injection molding machines, machine tools, conveyor systems

  
  

• Agricultural machinery — tractors, harvesters, agricultural irrigation equipment

  
  

• Automotive — heavy-duty trucks, engineering vehicles, hydraulic power steering

  
  

• Marine hydraulic systems — deck machinery, steering gears, winches

  
  

• Mining machinery — underground hydraulic supports, longwall shearers

  
  

• Air compressors and various filtering mechanical equipment

  
  

The element effectively removes solid particles, impurities, and moisture from hydraulic oil, preventing wear, clogging, and damage to key components such as hydraulic pumps, valves, cylinders, and motors .

📌 Customization note: P135 is offered as a configurable platform — filtration accuracy (1–200 µm), media type (glass fiber / filter paper / stainless steel wire mesh), end-cap material, and seal compound can all be specified per application. When ordering, provide your existing element's dimensions or the host filter housing model for cross-reference.

Fluid Compatibility

• Mineral hydraulic oil (ISO HM, HV, HH, HL) — NBR seals standard

  
  

• Mineral turbine / gear / compressor lube oil

  
  

• Phosphate-ester hydraulic fluid (HFDR) — FKM seals mandatory

  
  

• Water-glycol (HFC) — NBR acceptable; FKM recommended

  
  

• Biodegradable esters (HEES, HETG) — FKM recommended

  
  

Installation & Service

1. Shut down the equipment; relieve system pressure to 0 bar and isolate the filter housing.

   
   

2. Open the housing cover, withdraw the spent cartridge by its center tube or tie rod.

   
   

3. Inspect the housing interior, bypass spring, and seal grooves. Check spent media for metal particles — copper/iron debris indicates pump or valve damage; rubber fragments signal seal failure.

   
   

4. Seat the new P135 element — confirm flow direction (Outside → Inside). Renew all O-rings / seals (NBR or FKM per fluid type).

   
   

5. Close the housing, torque bolts evenly. Bleed air at the bleed port.

   
   

6. Restart and gradually ramp up to working pressure — never open the valve instantly to full flow.

   
   

7. Replace per clogging indicator or service interval. Typical replacement: 2000 operating hours in moderate contamination; 250–500 hours in foundry, mining, or marine heavy-duty environments.

   
   

8. Glass-fiber elements are disposable — never attempt to clean; only stainless steel wire mesh media can be washed and reused.

   
   

⚠️ A clogged element left in service will trigger the bypass valve (cracking at 0.3–0.35 MPa), allowing unfiltered oil to circulate. Monitor the clogging indicator and replace proactively — over 70 % of hydraulic system failures trace back to bypass-induced contamination.

Quality Assurance

• ISO 16889 – Multi-pass filtration performance (β-ratio, dirt-holding capacity, ΔP)

  
  

• ISO 2941 – Collapse/burst resistance

  
  

• ISO 2942 – Manufacturing integrity (bubble point)

  
  

• ISO 2943 – Media/fluid compatibility

  
  

• ISO 3723 – End-load compliance

  
  

• ISO 3724 – Flow fatigue under cyclic differential pressure

  
  

• ISO 3968 – Differential pressure vs. flow-rate characteristics

  
  

• ISO 4572 – Multi-pass filter performance determination

  
  

Ordering

Specify P135 with:

• Filtration accuracy (1, 3, 5, 10, 20, 30, 50, or 100 µm)

  
  

• Media type (glass fiber / filter paper / stainless steel wire mesh)

  
  

• End cap material (carbon steel / stainless steel / aluminum / nylon)

  
  

• Seal material (NBR standard / FKM for phosphate-ester)

  
  

• Working temperature range

  
  

• Host equipment model or existing element dimensions (OD / ID / length / end-cap pattern)

  
  

Provide your existing element's part number or the host filter housing model for cross-reference confirmation. Custom media grades, end-cap configurations, and bypass valve cracking pressures are available on request.

All values nominal; P135 is an AIRPURE hydraulic oil filter element with imported glass-fiber media, 10–15 µm typical filtration accuracy, ≥ 98 % efficiency, 2000-hour service life, 0–100 °C operating temperature, and full ISO test suite . Configurable filtration ratings span 1–100 µm (up to 200 µm per manufacturer capability), with βₓ ≥ 100, initial ΔP ≤ 0.02 MPa, bypass cracking 0.3–0.35 MPa, and burst pressure ≥ 0.7 MPa . Applications span construction machinery, industrial hydraulic equipment, agricultural machinery, automotive hydraulics, and marine systems . Confirm exact dimensions and fluid type against your existing element before installation.