Hydraulic Oil Filter Elements – Models A910267 & A910266

Two high-pressure hydraulic oil filter elements from the same A910xxx industrial filter family, designed for return-line, pressure-line, and bypass filtration across hydraulic power units, mobile equipment, compressor lube circuits, and portable oil purification systems. A910267 and A910266 are companion elements in the same series — both built around a micro-glass fiber or HV paper media pack qualified to ISO 16889 multi-pass testing, with configurable micron grade, collapse pressure, and seal material to match the host machine's housing envelope. They are widely deployed in industries spanning steel, electric power, metallurgy, shipbuilding, aviation, paper, chemical processing, machine tools, and construction machinery.

Key Features

• Media: Imported glass fiber, HV paper, or stainless steel wire mesh — selectable per application

  
  

• Filtration Accuracy: 1 / 3 / 5 / 10 / 20 / 25 / 40 / 50 / 80 / 100 / 150 / 200 µm (absolute-rated options)

  
  

• β-Ratio: βₓ ≥ 1000 per ISO 16889 multi-pass (micro-glass trim)

  
  

• End Caps: Carbon steel, stainless steel, aluminum, or nylon

  
  

• O-Ring: NBR standard; Viton (FKM) optional

  
  

• Collapse Pressure: 21–210 bar (configurable by trim)

  
  

• Temperature Range: -4 °F to +212 °F (-20 °C to +100 °C)

  
  

• Working Medium: Hydraulic oil (mineral HM/HV, synthetic, biodegradable ester)

  
  

• Bypass Valve: Optional per housing configuration

  
  

Technical Specifications

Exact OD, length, and mounting interface are configured per host machine housing — confirm against your existing element before ordering.

Application Guidance

Both elements serve pressure-line, return-line, and bypass duties on hydraulic power units, injection molding machines, press brakes, compressor lube circuits, and mobile excavator/loader hydraulics. They are also specified for portable oil purifier units, where high-pressure coalescing filtration conditions the oil to ISO 4406 target cleanliness.

The micro-glass media geometry is engineered to maximize dirt-holding capacity while maintaining stable β-ratio performance throughout the service life. Gradient-density pleat structure traps coarse particles at the upstream face and fine particles deeper in the media pack — extending service interval and protecting downstream pumps, valves, cylinders, and bearings.

Fluid Compatibility

• Mineral hydraulic oil (ISO HM, HV)

  
  

• Synthetic hydraulic oil

  
  

• Biodegradable esters (HEES, HETG) — use Viton seals

  
  

• HFC water-glycol — NBR acceptable; Viton recommended

  
  

• Phosphate ester (HFDR) — Viton seals + compatible media required

  
  

• Not for strong solvents or corrosive chemicals

  
  

Installation & Service

1. Shut down the equipment and relieve system pressure to 0 bar; close the oil inlet valve.

   
   

2. Open the drain port at the bottom of the filter housing and the vent at the top; discharge the oil cleanly.

   
   

3. Withdraw the spent element by its center tube; clean all internal filter surfaces.

   
   

4. Inspect the housing interior, bypass spring (if fitted), and seal grooves.

   
   

5. Seat the new element — confirm flow direction arrow (Outside → Inside). Renew all O-rings / seals.

   
   

6. Close the housing, torque bolts evenly in cross pattern. Bleed air at the bleed port.

   
   

7. Restart and check for leaks at operating pressure.

   
   

8. Replace per clogging indicator or service interval — typical 2000–2500 h under normal duty, shortened in high-contamination environments.

   
   

⚠️ When cross-referencing, confirm that dimensions, micron rating, β-ratio, collapse/burst pressure, bypass valve setting, and seal material all match the original — not just the part number. A properly matched replacement performs on par with the OEM element; a number-only match risks premature clogging or unfiltered bypass.

Quality Assurance

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

  
  

• ISO 2941 – Collapse/burst resistance

  
  

• ISO 2942 – Fabrication integrity (bubble point)

  
  

• ISO 2943 – Media/fluid compatibility

  
  

• ISO 3724 – Flow fatigue characteristics

  
  

• ISO 3968 – Pressure drop vs. flow rate

  
  

• ISO 9001 – Quality management system certified

  
  

Ordering

Specify A910267 or A910266 together with:

• Required micron rating (1 / 3 / 5 / 10 / 20 / 25 / 40 / 50 / 80 / 100 / 150 / 200 µm)

  
  

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

  
  

• Collapse pressure class (21 / 60 / 160 / 210 bar)

  
  

• Seal material (NBR / Viton)

  
  

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

  
  

• Mounting details (OD, length, thread or flange pattern of your current element)

  
  

Provide your existing element's dimensions or the host machine model and current OEM part number for cross-reference confirmation. Custom dimensions, media grades, and end-cap materials are available on request.

All values nominal; the precise OD, length, and interface geometry are configured per housing pattern. Confirm against your current element or housing drawing before installation — select micron grade to match circuit position: 3–5 µm for servo valves, 10 µm for piston pumps, 10–20 µm for vane/gear pumps, 20–25 µm for directional valves and cylinders. Too fine on suction/pre-filtration accelerates clogging; too coarse on servo circuits leaves precision components under-protected.