Oil Filters

Model: 66135177

Core Technical Specifications

Filtration Precision: 10–20 μm solid impurities

Filtration Efficiency: ≥98.8% for metal wear particles, carbon sludge and dust

Filter Media: Composite micro glass fiber / high-grade curing filter paper, acid & high temperature resistant

Thread Size: 1 1/2 inch standard spin-on thread

Bypass Valve Opening Pressure: 2.5 bar

Anti-drain Back Valve: Built-in silicone anti-reflux valve

Max Working Pressure: 16 bar / 232 PSIG

Continuous Operating Temperature: ≤110℃

Key Product Advantages

Effective Lubricant Purification & Airend Protection

Traps metal abrasive particles, carbon sludge and pipeline dust mixed in compressor oil. Delivers clean lubricating oil to screw rotor, bearings and gear components, greatly reducing rotor wear and extending the service life of airend, oil separator and post-processing filter elements.

Low Initial Differential Pressure for Energy Saving

Uniform pleated filter medium enlarges effective filtration area, optimizes internal oil flow channel and avoids sharp pressure rise during long-term operation. Reduces extra motor load and power consumption caused by blocked oil circuit.

Anti-Blockage & Long Service Cycle

Gradient deep filtration matrix holds large volume of sludge and metal debris, resists clogging from aging high-temperature lubricant oil, suitable for 24-hour continuous full-load factory operation.

Integrated Safety Valve Design

Built-in bypass valve automatically opens when filter is clogged to ensure uninterrupted oil supply to the airend, preventing compressor dry grinding and sudden shutdown failures. The anti-drain back valve avoids dry start wear after machine shutdown.

Working Principle

Lubricating oil circulating inside compressor flows radially through the filter medium from outside to inside. Metal wear debris, carbon deposits and solid sludge are intercepted and retained on filter fiber surface. Clean oil flows out from central thread hole to lubricate airend bearings and rotor meshing surface; bypass valve activates automatically when medium is severely blocked to guarantee continuous oil supply.

Application & Industries

Core wearing spare part for KAISHAN oil-injected screw air compressors, installed on main oil circulation pipeline.

Widely applied in machinery manufacturing, automotive spraying, packaging printing, textile factories, food processing, laser cutting equipment, pharmaceutical clean workshops and centralized factory compressed air supply stations.