Coalescing Filters

Part No: 2911001600

Core Technical Specifications

Absolute Separation Precision: 0.1 μm micro oil mist aerosols

Oil Mist Capture Efficiency: 99.99% interception rate for oil particles ≥0.1 μm

Outlet Compressed Air Residual Oil Content: ≤3 ppm, fully complies with ISO 8573-1 Class 3 industrial clean air standard

Filter Media: Imported multi-layer gradient borosilicate glass fiber composite media, anti-hydrolysis, continuous high temperature resistant up to 100°C

Max Continuous Working Pressure: 1.0 MPa

Continuous Operating Temperature Range: -10°C ~ 100°C

Clean low-dust construction site environment: 3,000–5,000 operating hours / 12 months

Heavy dust, high ambient temperature, 24/7 continuous construction load: Shorten service life to 2,500–3,500 hours

Mandatory replacement trigger: Differential pressure ΔP ≥ 0.08 MPa or visible oil carryover in downstream air pipeline

Initial pressure drop of brand-new separator: ≤0.02 MPa

Alarm replacement differential pressure: ΔP ≥ 0.08 MPa

Outer Support Jacket: Perforated galvanized steel mesh, anti-rust coating to resist long-term erosion of high-temperature oil vapor and acidic condensate inside the oil tank

Inner Central Support Tube: Thickened perforated steel core, anti-collapse deformation under sudden airflow pressure surges

Mounting Flange & Gasket: Integrated stamped steel flat flange, heat-resistant fiber composite full-face sealing cushion, zero air/oil bypass leakage

Built-In Oil Return Pipe: Central micro drain channel collects coalesced liquid oil and refluxes back to tank oil sump to avoid secondary oil re-entrainment by high-speed airflow

Key Product Advantages

Core primary separation component for portable construction screw compressors to control residual oil content of compressed air

Installed at the gas outlet of the portable compressor oil receiver tank, this element captures micro oil aerosols generated after rotor compression under variable load conditions. It limits outlet air residual oil below 3 ppm, fully protecting downstream refrigerated dryers, desiccant dryers and inline precision coalescing filters from heavy oil contamination and premature failure.

Multi-layer gradient glass fiber media with large contaminant holding capacity & stable low pressure loss

Multi-gradient glass fiber composite media provides massive oil sludge storage capacity, slowing differential pressure rise throughout the full service cycle even under construction-site heavy dust & oil load. Layered coalescing structure aggregates micro oil droplets into continuous liquid film for gravity reflux, maintaining consistent ultra-high separation efficiency without performance decay.

Integrated central oil return pipeline eliminates secondary oil carryover risk

Coalesced liquid oil flows down the dedicated central drain tube directly back to the tank bottom oil sump, preventing separated oil from being blown back into clean air stream by high-speed turbulent airflow, sustaining stable low oil carryover performance for the entire service life.

Full galvanized anti-corrosion & anti-static metal framework adapts to harsh construction site environment

All metal supporting frames adopt galvanized anti-rust treatment, resisting long-term erosion of high-temperature oil vapor, dust and acidic condensate inside the oil tank; built-in static conductive structure eliminates static accumulation hidden fire hazard inside the filter element.

Air-Oil Separation Working Principle

High-temperature oil-air mixed gas discharged from screw rotors enters the outer cavity of the separator element. Large oil droplets collide with outer steel perforated jacket and drop into the oil tank via gravity for primary coarse separation.

Fine submicron oil mist aerosols penetrate multi-layer gradient glass fiber media; tiny oil particles collide, aggregate and coalesce into continuous liquid oil films on fiber surfaces.

Coalesced liquid oil flows downward along media layers, converges into the central built-in oil return tube, and refluxes back to the oil sump for circulation reuse.

Clean low-oil compressed air (residual oil ≤3 ppm) passes through the inner core support tube and flows out of the oil tank to downstream air treatment equipment and construction pneumatic tools.

When media is fully saturated with carbon sludge and oil deposits, differential pressure rises sharply; excessive pressure difference may crack glass fiber media and cause massive oil carryover fault.

Application Scope

Road construction pneumatic tools, mining blasting air supply, engineering metal cutting & welding, mobile sandblasting equipment, temporary factory mobile air supply, municipal engineering pipeline pneumatic equipment.