Oblan Dynamic Engine Air Precleaners

One piece rust-proof rotor, made of polipropylene with addition of rubber, which gives an excellent strength to impact even at low temperatures. As it is a one piece unit, it won't dismantle or become unbalanced during operation.

The rotor is mounted on dual ball bearings over double welded plate steel (not hanging from the precleaner body). This design gives high stability to the rotor even at maximum rpm.

The rotor blade area is differential, it decreases to the centre. This design guarantees that the air entering into the precleaner will produce the enough rotor speed to eliminate the impurities even at low engine rpm.

Double-welded plate steel that gives maximum strength to material fatigue caused by vibrations, avoiding breaks in the junction between the precleaner plate and the outlet pipe to filter housing.

Specially designed discharge ports with a bigger and uniform area. This avoids obstructions and guarantees a maximum precleaner efficiency during its working life.

The perforated metal pre-screen at the inlet has the same diameter than the precleaner external body. In this way it has a larger inlet surface and less restriction to the airflow. The screen holes are circular shape with special arrangement and small diameter, giving a big inlet total surface and avoiding larger contaminants to enter.

Oblan has 3 different lines of dynamic air precleaners with more than 28 standard models, giving the better choice for each application.

The precleaner outlet tube is provided in different diameters. This outlet tube can be also adapted with the supplied reducing sleeves for a variety of outlet choices. Due to the exclusive discharge ports design the eliminated particles can't be recirculated by the precleaner.

Available application airflows from 18 to 1411 CFM (0.5 to 40 m3 /min.). For larger airflows precleaners can be installed in parallel. They are steel made by stamping and welding with an excellent mechanical strength. Precleaners are powder coated for a durable, corrosion resistant finish.

The precleaner outlet tube is provided in different diameters. This outlet tube can be also adapted with the supplied reducing sleeves for a variety of outlet choices. Due to the exclusive discharge ports design the eliminated particles can't be recirculated by the precleaner.

Available application airflows from 18 to 1411 CFM (0.5 to 40 m3 /min.). For larger airflows precleaners can be installed in parallel. They are steel made by stamping and welding with an excellent mechanical strength. Precleaners are powder coated for a durable, corrosion resistant finish.

Other Dynamic Engine Air Precleaners

Compound rotor: plastic core, iron wire rays and ladle type metal blades welded to the rays. If there is any welding failure or corrosion problem in the blades, the rotor could lose a blade and may become unbalanced, resulting in rotor destruction.

The rotor is hanging from the precleaner body. If the body suffers knocks, vibrations or mechanical distortions it is possible to have interference between the rotor blades and the static vanes, causing the rotor to stop.

The rotor blade area is ladle type at the ends but it doesn't have section against the air flow in the middle portion of the blade. For this reason the rotor doesn't generate enough speed to centrifugate the impurities when the engine is running at low rpm.

Simple-welded plate steel that doesn't give an optimum structural strength to the precleaner.

Wedge shape discharge ports. Large particles can obstruct the discharge ports decreasing precleaner efficiency or even cause it to stop functioning.

The perforated metal pre-screen at the inlet has the diameter of the static vanes body. So the inlet surface is quite small and could be obstructed by large contaminants, especially in harvester machines. The screen holes are rhomb shape or circular shape with big diameter, so larger contaminants could enter the precleaner and then plug exhaust port areas.

Limited quantity of models and options.

Limited variety of coupling diameters. In stationary engines and slow-moving machinery some models present a high recirculation percentage of particles already eliminated by the air precleaner.

More limited application airflows: 50 to 1100 CFM (1.5 to 30 m3 /min) in general. Some of them are plastic made with low mechanical strength and not resistant to climate effects (U.V. rays and rain).

Limited variety of coupling diameters. In stationary engines and slow-moving machinery some models present a high recirculation percentage of particles already eliminated by the air precleaner.

More limited application airflows: 50 to 1100 CFM (1.5 to 30 m3 /min) in general. Some of them are plastic made with low mechanical strength and not resistant to climate effects (U.V. rays and rain).

Oblan Dynamic Engine Air Precleaners

Requires no maintenance. They are steel made by stamping and welding with an excelent mechanical strength. Precleaners are powder coated for a durable, corrosion resistant finish. They are resistant to climate effects (U.V. rays and rain).

They can be mounted in the up-right or in horizontal position depending the preclener model and application.

Oblan dynamic precleaners work efficiently with all kinds of solid particles, whether heavy or light.

These particles include dust, dirt, insects, rain, snow, etc. Precleaner efficiency remains constant every time.

It is a system that combines a static vanes body and a dynamic body (rotor). It removes up to 90% of impurities from intake air before the air enters the filter elements.

Other Dynamic Engine Air Precleaners

Requires 30 to 45 minutes of maintenace a week. They are usually plastic made, and suffer the effects of climate (material degradation). These static precleaners are frequently damaged by knocks, by over-fastening the bolt after maintenance or by temperature differences.

They must be mounted only in the up-right position in order to acumulate the dust and other contaminants.

Dust Bowl precleaners work efficiently only with heavy solid particles collecting dust, dirt, insects, rain and snow. However they are ineffective with light or fine particles.

Precleaner efficiency is variable (it decreases as the bowl starts to fill up and it is low for low engine rpm).

It is a centrifugal system with a static vanes body only. Due to this the precleaner efficiency is much lower than a dynamic system such as Oblan.