Air/Oil separator filter DB2022

DB2022 is an integrated top hat-type oil-gas separator filter element designed specifically for medium and large screw air compressors. It is mainly used to efficiently separate gas and liquid from the high-temperature oil-gas mixture discharged by the main unit, ensure the cleanliness of compressed air, and recover lubricating oil for recycling.

Core Performance and Technical Features

• High-efficiency coalescing separation.

Adopting multi-layer gradient superfine glass fiber composite filter media, it achieves an oil-gas separation efficiency of over 99.99% via direct interception, inertial impaction and Brownian diffusion mechanisms, with a nominal filtration accuracy of 0.1 μm.

• High-flow and low-resistance design.

The rated air handling capacity reaches up to 924 m³/h (approximately 15.4 m³/min), compatible with screw air compressors in the 90kW–110kW power range. The initial pressure drop does not exceed 0.02 MPa (0.2 bar), which effectively reduces the loading energy consumption of the air compressor.

• High-strength pressure-resistant structure.

The interior is supported by a high-strength anti-corrosion carbon steel perforated mesh frame. The end caps are sealed by precision stamping and high-temperature-resistant structural adhesive, capable of withstanding a continuous operating temperature of up to 120°C and transient pressure differential shocks from the system.

• Safe anti-static design.

The flange is equipped with an oil-resistant sealing gasket and built-in conductive pins/static dissipation structure, ensuring static electricity generated by friction under high-speed airflow inside the filter element can be safely conducted to the grounded oil-gas barrel shell to eliminate risks of oil and gas combustion and explosion.

• Long service life.

Under standard air intake and regular lubricating oil maintenance conditions, the normal service life can reach 4,000 to 8,000 hours.

Key Factors Affecting Actual Filtration Precision

During operation, whether the DB2022 can stably achieve a 0.1 μm-level separation effect is directly affected by the following operating conditions:

• Operating pressure differential.

The initial pressure drop shall be ≤ 0.02 MPa (0.2 bar). When the service life expires or the filter medium is clogged and the pressure differential exceeds 0.08–0.10 MPa (0.8–1.0 bar), oil droplets may be forced through the filter medium by high-pressure airflow, resulting in a sharp rise in oil content in exhaust gas.

• System temperature.

The normal exhaust temperature should range from 75°C to 95°C. If it remains above 110°C–120°C for a long time, the lubricating oil will generate substantial oil vapor (gaseous rather than liquid microdroplets), exceeding the physical interception limit of the coalescing filter element.

• Condition of the oil return pipeline.

The secondary oil return tube at the bottom of the filter element (extending from the top M8 connector to the bottom) must remain unobstructed with a 2–3 mm gap from the bottom of the element. Otherwise, the coalesced liquid oil cannot be drained in a timely manner and will be re-carried into the compressed air pipeline network by the airflow.