Coalescing Filters

Model: A51132974

Type: Spin-on Full Flow Oil Filter for Rotary Screw Air Compressor

Core Technical Specifications

Filter Media: High-temperature resistant multi-layer composite micro filter paper

Filtration Precision: ≥99.5% capture efficiency for particles above 10μm

Max Working Pressure: 1.6 MPa / 16 bar

Continuous Operating Temperature: ≤120℃

Opening pressure of bypass valve: 2.5 bar

Anti-drain back valve opening pressure: 0.12 bar

Initial differential pressure: ≤0.01 MPa

Service Life: 3000–6000 working hours or 12 months

Installation form: Spin-on threaded external oil filter

Sealing material: High-temperature nitrile rubber gasket

Key Product Features

High-flow efficient impurity interception

Large pleated filtration area adapts to large oil circulation volume of medium & large compressors. Fully intercepts metal wear debris, carbon sludge, oil oxidation sediment and pipeline dust, effectively protecting screw rotor, bearings and oil cooler from abrasion and blockage, extending main unit service life.

Low pressure drop energy-saving design

Uniformly folded graded filter paper ensures smooth lubricant circulation, maintains stable low flow resistance under full-load continuous operation, avoids insufficient oil supply and high power loss caused by filter clogging.

Large dirt holding capacity

Deep-depth folded structure stores massive solid pollutants, prolongs maintenance cycle and reduces replacement frequency.

Double safety valve design

Built-in anti-drain back valve prevents dry start wear when the compressor is shut down; bypass valve automatically opens under excessive clogging pressure to guarantee uninterrupted lubrication and avoid main unit burnout.

Thickened anti-corrosion metal shell & reinforced inner support

Integral galvanized steel housing and perforated metal inner core resist high oil pressure fluctuation, prevent filter collapse, rupture and oil leakage risk.

Working Principle

Compressor lubricating oil flows into the filter from the central threaded inlet. Solid impurities in oil are trapped by composite filter paper; clean oil flows outward to lubricate and cool the airend, then circulates back to the oil tank to form a closed lubrication loop. When the filter element is heavily clogged, the built-in bypass valve opens to maintain oil supply safety.

Application & Industries

Widely used in machinery manufacturing, automotive spraying, food & pharmaceutical processing, packaging, textile, centralized factory air supply and large workshop pneumatic equipment systems.