Air Filters

Model: P781399

Core Technical Specifications

Filter Type: Secondary safety air filter

Filter Media: High-density industrial cellulose composite filter paper, dust-proof & anti-static

Dimension Parameters

Outer Diameter: 230.9 mm

Inner Diameter: 176.3 mm

Overall Length: 484 mm

Max Operating Temperature: ≤80℃

Key Product Advantages

Dual Backup Protection for Engines & Compressors

Works as the last line of defense behind the primary filter. If the outer primary filter is damaged, cracked or improperly installed, this safety filter blocks dust, sand and debris to avoid abrasive wear on engine cylinders or compressor airend rotors. It also stops contaminants from entering the clean air side during primary filter maintenance.

Rapid Clogging Alarm Function

Designed to clog quickly once dust penetrates the primary filter, which raises intake pressure drop obviously to remind operators of primary filter failure in time, avoiding long-term unfiltered air intake.

Low Initial Intake Pressure Drop

Uniform deep-pleated filter paper expands effective filtration area, keeps stable low air resistance during long-term operation, reduces extra motor power consumption caused by blocked air intake.

Reliable RadialSeal Integrated Sealing System

Elastic rubber radial sealing end caps fit tightly with air cleaner housing, eliminate unfiltered air bypass; internal metal support mesh prevents filter paper deformation under negative suction pressure.

Working Principle

Atmospheric air first passes through the outer primary filter to capture most large dust particles. Residual tiny dust that penetrates the primary filter is fully trapped by the inner P781399 safety filter. Clean air flows into engine combustion chamber or compressor airend. When replacing the primary filter, the safety filter seals the air intake channel to stop external dust falling into the clean pipeline.

Application & Industries

Widely used in mining quarries, construction sites, farmland, stone processing plants and heavy industrial production workshops with severe dust environment.