Air Filters

Core Technical Specifications

Filtration Grade: Suction protective filter

Absolute Filtration Precision: 10 μm solid particle interception

Particle Capture Efficiency: ≥98% for solid impurities ≥10 μm

Operating Pressure Range: 0 ~ 1.6 MPa

Operating Temperature Range: -20°C ~ +90°C

Filter Media: Multi-layer folded micro glass fiber composite with metal support mesh, anti-rust, anti-hydrolysis, compatible with mineral hydraulic oil

Clean indoor hydraulic station: 2,000–4,000 operating hours or 12 months

Outdoor railway construction site / heavy dust environment: 1,000–2,500 hours

Mandatory Replacement Trigger: Obvious pump noise, system pressure fluctuation, or filter blockage alarm

Differential Pressure Thresholds

Initial pressure drop of brand-new element: ≤0.008 MPa

Blockage alarm differential pressure: ≥0.04 MPa

Structural Construction Features

Double-layer metal protective mesh prevents filter media deformation and collapse under suction negative pressure

Full folded media design with large dirt holding capacity, slow pressure rise during service life

Sealed plastic end caps avoid oil bypass and secondary pollution

Compact small-size structure, suitable for narrow built-in tank installation space of railway vehicles

Key Product Advantages

Anti-collapse double-layer metal support structure

Adapt to negative pressure suction working condition, avoid media collapse caused by pump suction, stable filtration performance for long-term continuous operation.

High dirt holding capacity folded media

Sufficient folding area accommodates iron powder, sand dust and metal wear debris from hydraulic system, effectively extend service cycle.

Compact submerged tank design, save installation space

Small cylindrical structure specially developed for railway vehicle limited oil tank internal space, easy disassembly and oil tank internal cleaning.

Effective hydraulic pump protection

Block large solid impurities before oil enters hydraulic pump, reduce pump gear/plunger wear, lower failure rate and extend main pump service life.

Working Principle

Hydraulic oil mixed with metal wear debris, sand and dust enters filter element from outer mesh side via tank suction port.

10μm and above solid particles are intercepted by multi-layer folded glass fiber media, impurities stay on filter media surface.

Clean hydraulic oil flows through inner core to hydraulic pump suction inlet, providing clean oil for hydraulic system.

Filter element cannot be cleaned and reused. After media is blocked by impurities, differential pressure rises sharply and pump cavitation noise occurs, full replacement is required.

Application Scope

track tamping vehicles, rail grinding machines, track lining machines, heavy-duty engineering hydraulic stations, large off-road construction machinery hydraulic suction circuits.