Creating solutions since 1982

Since 1982 we develop and install dust and gases aspiration and filtration systems.

The current operational requirements are directly related to an increased processing capacity in industrial plants and its consequent increased product movement volumes in the different stages of the process. This increases dust and residue emissions, which must be aspirated, filtered and handled to their final point.

As an answer to the evolution of concepts and environmental protection regulations and to the essential adequacy of plants to industrial safety and hygiene international standards, VENTILAR S.A. provides increasingly complex installations which demand a careful previous technical analysis, an adequate engineering design and the presence of a qualified technical team for provision and mounting.

Seeds Reception (Truck, Rail-Wagons and Barge Hoppers)

Regarding dust production, seeds reception points are the most conflicting locations.

The reason for this is that seed unloading from trucks or rail-wagons is done as fast as possible.

Such points are usually located in the largest open areas of the seeds storage and dispatch plants.

In this case, to achieve efficient dust aspiration, it is necessary to install specific equipment, such as fans, dust traps and bag filters. The confinement of the area is also necessary to avoid undesirable air flows that will disrupt the collection of the dust produced by the unloading of the seeds.

This allows the systems’ rationalization with adequate electrical energy consumption and its consequent operational energy savings.

Seeds Dispatch

Our systems can also be applied in seeds dispatch.

They can be used in existing belt and chain conveyors under bins or silos (with high-explosive risk because they are confined spaces), in transports that carry products to the loading dock (in the case of ports) or in rail-wagon and truck loaders (in the case of storage and conditioning plants).

As in the case of seeds reception, the confinement of the area is of great importance to facilitate the aspiration of the dust produced in such areas.

High-Pressure Filters

In particular, high-pressure filters are very useful when working with low flows because they are more affordable, and especially when the plant has compressed air net.

In general, dirty air enters the filter through the lower part, penetrates the body of the filter in the area of the bags and passes through the fabric on its way up to the filter’s head.

When passing through the fabric the dust is retained in the outer face of the bags.

Filtering bags can be made in needled nonwoven polyester or polypropylene in accordance with the requirements of the product to be filtered.

Filtering bags are setting by the snap-band system that keeps them secured and in position.

The filter head is located in the upper part of the filter, and holds the bag cleaning system.

The bags are cleaned with a burst of compressed air that is injected into the bags counter-currently to the air being filtered, in order to produce the detachment of the dust retained by the fabric.

For cleaning the fabric, our filters use a full-immersion system in which the electrovalve is directly coupled to the reservoir, thus eliminating the connecting hose.

This system is much more efficient in producing a faster liberation of the compressed air that carries out the cleaning.

Autonomus Filters

Compact filtration units, with incorporated fans, which are used in punctual locations and exclusively serve such location.

This avoids using rotary valves. The possibility of reinjecting the separated dust through the same collection point makes it unnecessary to install ducts.

This type of equipment is usually used in:

  • Belt conveyors with continuous enclosure
  • Redlers (Chain conveyors)
  • Airtight silos

Bag Filters With Low-Pressure Cleanning

The bag filter with low-pressure cleaning uses a centrifugal fan – with adequate power for each model – incorporated in the filter’s clean chamber, or on the outside, in accordance with the critical requirements of the design.

This fan takes previously filtered air and blows it counter-currently, causing the detachment of the particles with a pressure which is not higher than 35 g/cm2 and the necessary flow to achieve the desired effect.

The cleaning air flow is distributed through a mechanically-activated rotating arm, connecting the blowing fan and the bag necks by means of elastic seals.

The low-pressure filter has three main chambers which are connected to each other:

Cleaning chamber

This chamber holds the cleaning system but also allows entering the chamber to replace or verify the bags without the use of tools, thus allowing periodic maintenance.

This possibility allows operators to work in total safety conditions. The access to this chamber is by means of a ladder with an intermediate landing platform and a safety cage.

Bags chamber

This chamber holds the baskets and bags that make up the dust filtration system.

The number of bags and the filtration surface to the filtration relationships in accordance with the product to be separated.

The bag-holding baskets are built in galvanized steel mesh and have an upper galvanized iron metal sheet protector conformed to protect the rim of the bags.

The bags are of snap-band type, and are made in needled nonwoven polyester with a density in accordance with the requirements of the product to be aspirated.

The explosion relief devices are placed in this module of the filter, calculated in accordance with NFPA Standards.

Previous and inlet chamber

The entrance of the aspirated air flow with the greatest dust concentration occurs in this sector of the filter. A inlet deflectors is installed to force heavier particles to fall, while allowing lighter particles to reach the bags sector.

The filter hopper lower part is developed with a slope not less than 70° to prevent dust accumulation in the sides.

Under this hopper, a worm-screw collector transport the dust to the airlock that provide the air seal.

The filter's support structure is independent from the filter.

The support structure is designed in accordance with the size of the filter and the loads it will bear, considering its own weight and the weight of the previous chamber filled with product.

The structures are built with C and I standard steel beam with thicknesses according to calculations. Both the structure and the filter are delivered painted with an epoxy antioxidant base and two coats of synthetic enamel.

The filter are supplied with a differential pressure manometer to determine the degree of fabric saturation.


These are systems used to achieve overpressure in those sectors in which there is equipment susceptible to be attacked by dust and foreign materials.

In many cases, pressurizations are combined with air renovations with the purpose of improving the temperature of the injection air.

They are compact equipment, with variable flows according to designs.

Normally, the air used in pressurizations is filtered air. The filtration quality varies in accordance with the critical requirements of the sector. It is possible to install from gravimetric rigid filters to absolute and opacity filters, which are suitable for pharmaceutical areas.

In some industrial areas we install automatic self-cleaning filters. In general, we install manual cleaning filters. Cleaning time is detected by differential manometers which report the saturation point of the filters.

Pneumatic Conveying

Systems used to transport materials over long distances avoiding pathways unable to be covered with traditional equipments like elevators, redlers, and belt conveyors.

Systems which – due to the possibility of working with high concentrations of solids in air – allow transporting variable capacities between 0.1 ton/hr and 40 ton/hr, along distances that go from 10 to 500 meters.

According to the specific task, they can be applied as blowing units, fans or root-type pumps.

It is possible to develop larger capacity systems with variable distances for each case in particular.