Fairs and events by Aircom

Aircom specialises in the production of accessories for industrial suction in Nervesa della Battaglia. Always committed to innovation and customer satisfaction, it participates in various fairs and events every year.

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Aircom cleaning system in detail with Rilsan tubing

Aircom explosion-proof panels, certified and installed.

Suction system with Aircom non-return valves fitted

HOW AND WHY TO PROTECT THE FILTER OR SILO FROM A BLAST

In the intake system, it is important to protect oneself against bursting, so let's understand together which elements need to be known and analysed.

PRESSURISATION CONTROL UNIT FOR FIRE ALARM AND FIRE EXTINGUISHING SYSTEM

For the safety of the system, in addition to dampers, there is the possibility of installing an extinguishing system in the pipes, which, connected to a control system, detects the presence of sparks/fire

SOLUTIONS FOR PLANT OPTIMISATION

The most commonly used dampers are butterfly and guillotine dampers. The main difference between the two is the material passage section

THE FLAME ARRESTOR

WHAT IS IT?

The flame arrestor is a device that covers the explosion vent panel, which is typically installed in the filters or silos of suction systems.

The special coating of the panel is designed as a structure that stops the flame generated by an explosion in the filter, preventing nearby people or objects from being damaged or injured by the flame effect.

WHY SHOULD I INSTALL IT?

More and more often, the available space in a company for installing the filter/silo of the suction system is very limited or not available outside the working environment. For this reason, these units are placed inside the workplace.

This situation poses a significant risk to people and objects operating nearby, making it essential to minimize the effects of an explosion, as regulated by standard EN 16009.

Frangifiamma Aircom con la porta d'ispezione aperta

HOW DOES IT WORK?

Inside the flame blocker, the explosion vent panel is installed. When an explosion occurs, the panel breaks; the pressure and flame from the explosion pass through its special structure, which cools and extinguishes the flame. This reduces the explosion pressure and allows safe passage at distances of up to 5 meters.

It is important to note that this safety measure would be impossible without this particular structure.

Pannello antiscoppio Aircom senza copertura con fiamma visibile

Pannello antiscoppio Aircom con copertura (= frangifiamma) e fiamma non presente

The significant difference in the explosion's impact is clearly visible in the photo above: in open panels, the flame is clearly visible, while in panels with a flame arrestor, it is not.

Its use is highly recommended and mandatory in situations where the filter or silo can be approached by people during normal work processes in the company. SAFETY IN THE WORKPLACE.

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HOW TO CHOOSE THE RIGHT SAFETY DIVERTER

There are many types of diverters on the suction market, but not many provide protection against damage caused by an explosion.

To reduce the effects of an explosion or prevent one from occurring, Aircom has developed two important diverter models:

DRS – Rapid Spark Diverter
DEVEX – Explosion Diverter

The DRS "Rapid Spark Diverter" is designed to divert sparks that may be generated during the working process. If a spark were to reach the filter or silo, there would be a risk of explosion.

The first and most important technical feature is its FAST CLOSURE SPEED, while the second, though less critical, is ensuring NO PRESSURE LOSS during operation.

To function properly, the diverter must be connected to a spark detector. In a very short time (approximately 100-130ms), the diverter closes the airflow to the filter and diverts the spark into the atmosphere.

Deviatore rapido di scintilla Aircom fronte e retro

The DEVEX "Explosion Diverter" has been developed to redirect the effects of an explosion within the filter, preventing it from traveling back into the building (workplace) through the duct.

This configuration is mainly used for energy-saving purposes, particularly concerning workplace heating during the winter months. Additionally, another crucial aspect is that it prevents the explosion from reaching the work environment.

This device does NOT BLOCK the explosion but rather DIVERTS IT—an essential point to remember to ensure it is used correctly.

Deviatore d'esplosione Aircom verniciato RAL 3020

When selecting an explosion diverter, it is essential to consider these key technical features. Aircom’s DEVEX models are equipped with a triple closure activation system:

Closure activation in case of a blackout;
Closure activation via a signal from a flame detector, spark sensor, or another sensor;
Closure activation due to overpressure generated by an explosion (only upon request – mobile band system).

At AIRCOM, workplace safety is our top priority, but we also focus on energy efficiency in the company's production processes.

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FAST SPARK DIVERSION DEVICE - DRS

The fast spark diversion device is a crucial component in industrial suction systems. It is designed to quickly and precisely divert sparks generated during certain manufacturing processes and extracted by your suction system, preventing them from reaching your filter, which could cause potential fire or explosion hazards.

The fast spark diversion device must be managed by a control unit with a spark detection system. When the detector identifies one or more sparks, it activates the fast spark diversion device, redirecting the sparks to another duct. This process occurs in an extremely short time, allowing the management of high-frequency events.

Where can the fast spark diversion device be installed?

Push suction systems
Pull suction systems

What are the advantages of installing a fast spark diversion device?

High response speed: allows quick spark diversion
Versatility: usable in both push and pull systems

In conclusion, the fast spark diversion device is a simple yet effective technology that protects your system from potential sparks that could reach your filter.

Its ability to divert sparks quickly and precisely ensures the safety of your suction system.

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RETRACTABLE DAMPERS

Serranda a scomparsa modello a bilanciere Aircom

To provide the installer with a valve that offers greater safety and functionality while not occupying too much space when opened, Aircom has developed retractable dampers.

The advantage of these valves is that they leave the section for the passage of waste material completely clear; the installation of this type of valve does not result in significant pressure loss.

The Aircom retractable or drawer dampers can be of different types:

Manual
Balance
Pneumatic airtight

The choice of actuation should be assessed to achieve the desired goal in the extraction system.

All models can be supplied as standard or with ATEX II 2GDT6/T85°C certification.

In the latter case, all potential spark sources are eliminated with appropriate materials (where necessary), and in the case of pneumatic dampers, ATEX certified products are used.

MANUAL DAMPER

The manual retractable valve is operated by the user via a lever located on the side of the damper, ensuring precise and rapid control.

This type of damper is particularly useful in situations where electrical power is not easily accessible or in environments with specific safety requirements that necessitate manual intervention.
BALANCE DAMPER

The balance drawer damper opens and closes autonomously, as the balance beam, connected to the valve, allows for controlled and balanced movement.

In fact, the counterweight rod facilitates movement in the case of excessive depressions and protects the system in the event of sudden depressions that could damage the piping.

The balance damper is an ideal choice when looking for a solution that combines robustness and ease of use; it also requires minimal maintenance.
PNEUMATIC AIR-TIGHT DAMPER

The retractable damper has the advantage of being operated by a pneumatic cylinder; therefore, it can be controlled by a simple manual solenoid valve or by a PLC-controlled unit.

Moreover, by using compressed air to operate the mechanism, a faster and more precise response is achieved in the opening and closing of the valve.

This allows for real-time adjustment and greater adaptability to different situations; furthermore, its complete opening allows the duct to remain entirely clear, avoiding the accumulation of material inside.

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TRAINING AT YOUR FINGERTIPS

Aircom team during our online training courses

Knowing how products work is not always enough to ensure their correct installation.

For this reason, AIRCOM has decided to offer training courses without requiring you to leave your workstation!

This need arose during the lockdown period when we were frequently asked to address existing installations due to system modifications. To provide a post-sales service that supports both the customer and the installer, we have decided to conduct training courses online, focusing primarily on Non-Return Valves (NRV COMBO and METAL Series) and Fire Dampers. These courses aim to educate operators on the proper functioning, installation, and maintenance of these products.

Given the increasing demand, we have expanded the range of products included in our staff training. Based on your needs, we can create a customised programme covering the products of greatest interest to you.

You can contact us at aircomtv@aircomsrl.it to schedule dates, times, and topics for the training course. Upon completion, you will receive a Training Certificate.

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HOW TO ENSURE THE PROPER OPERATION OF A NON-RETURN VALVE

The cleaning system is one of the Aircom accessories that can be fitted to Aircom Non-Return Valves.

WHY INSTALL THE SYSTEM?

During normal operation of the suction system, waste material can accumulate on the bottom of the valve. To ensure the correct operation of the damper and provide greater assurance that nothing affects the valve's functionality, a capacitive sensor can be installed at the bottom of the valve to detect and monitor the presence of deposited material.

WHAT IS THE SYSTEM FOR?

The installation of the cleaning system prevents the formation of dust or waste material piles that could hinder the correct closure of the diaphragm.

The sensor, which detects the presence of material, can be integrated with a compressed air blowing system that will agitate the deposited material.

The cleaning system can be fitted to non-return dampers ranging from Ø200 to Ø1200.

Maintenance for proper operation

The maintenance of NRV (Non-Return Valves) is necessary and mandatory according to the instructions in the manufacturer’s manuals to ensure the valve operates correctly. Valve maintenance is always divided into two types: regular and extraordinary.

Regular checks are performed at various intervals depending on the tasks to be carried out.

Below are the recommended intervals for various regular maintenance tasks (these are indicative and at the manufacturer's discretion); depending on the type of materials handled and frequency of operation, these may need to be increased or decreased:

VERY IMPORTANT: This type of evaluation should only be considered after some regular maintenance as indicated by the manufacturer:

POS.	OPERATION TO BE PERFORMED	FREQUENCY
1	General visual inspection	1 month
2	Check for the absence of material deposits at the bottom of the valve	3 months
3	Check the free rotation of diaphragm pins and the operation of anti-opening blocks	3 months
4	Check the condition and tightening of nuts	6 months
5	Check the earth connections of the protection system	6 months

Extraordinary maintenance is carried out when unforeseen events occur that have compromised the correct operation of the valve.

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ATEX REGULATIONS: HOW AIRCOM MEASURES UP TO SAFETY

Aircom non-return valves, certified and installed with fire dampers and devex

The ATEX Directive 2014/34/EU, which came into force on 20/04/2016, is applied to all products (electrical and mechanical) intended for place with explosion danger. It also defines to be met by products installed in places where there is a danger of explosion, also providing the different procedures to be carried out to achieve compliance.

In order to help installers choose the most suitable system, Aircom offers a line of products certified ATEX Group II.

In the Directive products are divided into 2 groups of materials:

Group I: Products for use in coal mines
Group II: Equipment for surface use

The group we are going to analyze are the products of Group II; for this equipment there are 3 categories:

Category 1: Systems providing a very high level of protection
Category 2: Systems providing a high level of protection;
Category 3: Systems providing a normal level of protection;

Each category, however, is followed by the letter G (Gas) or D (Dust).

All products of each category must be accompanied by the EU Declaration of Conformity and the instructions for use.

Among the ATEX certified Aircom products there are products suitable for both Gas and Dust;

In detail:

· Anti-E xplosion Panel : Group II GD

· Resealable Panel: Group II D

· NRV COMBO and NVR METAL Non-return Valves: Group II D

· Flameless: Group II category 2 D

Each of these items performs a different function within the plant and it is necessary to know the best waste materials of the works to evaluate their installation.

As for ATEX certified plants in Italy, it is necessary that they comply with Directive 99/92/EC. The Directive provides for the classification into zones of workplaces where explosive atmospheres may occur and determines the groups and categories of equipment to be used in each zone.

All our business processes adopt a quality management system according to the EN ISO 9001:2008 Certificate. This means that each item is subjected each year to the verification of external auditors appointed by the notified certifying body. Maintaining the compliance of our processes to ISO 9001 allows us to measure and maintain over time a continuous improvement of the products placed on the market and the assistance services offered to customers. This corporate commitment is maintained to give continuity to the corporate strategy, always attentive to the needs and constant satisfaction of its customers.

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FIREBREAK SASH SHUTTER WITH GRAVITY CLOSURE

AIRCOM fire damper mounted on horizontal pipework

The Firebreak sash shutters by Aircom have the advantage of leaving the duct completely free and closing almost instantaneously when needed.

The types of shutters we offer are 4:

1- STFRT

2- STFRT-PM

3- STFRT-MA

4- STFRPCMT / -O

Each of these models is ATEX certified and classified EN1366/2/EN1363-1 REI120/RE120.

STFRT

The STFRT model is equipped with manual reset, and the system is regulated by the fuse, which, when it reaches 72°C, breaks and releases the diaphragm (gravity closure).

This model is designed for "Standard" installation in a vertical position.

In this position, thanks to the seals present, the diaphragm completely isolates the duct.

After an intervention, resulting in the closure of the diaphragm, it will be necessary to restore the fuse and manually reset the damper.
STFRTPM

The STFRTPM fire dampers have a diaphragm release system controlled by a single-acting pneumatic piston, operated by a monostable solenoid valve, hence requiring a detection, control, and functional indication system installed on the pipeline.

Therefore, upstream, a spark or flame detector must be installed, which, managed by a control unit, will send the signal to the solenoid valve connected to the piston to command a mechanism for gravity closure of the diaphragm. This model is designed for "Standard" installation in a vertical position.

After an intervention, resulting in the closure of the diaphragm, it will be necessary to reset the control unit and restore the release system; this involves manually resetting the diaphragm and cylinder.
STFRTMA

The STFRTMA model is equipped with 2 pneumatic cylinders that allow the lifting of the diaphragm; once in position, an electromagnet will keep it lifted. Therefore, it requires a detection, control, and functional indication system installed on the pipeline.

For this reason, a spark or flame detector must be installed upstream, which, managed by a control unit, will send the signal to the solenoid valve connected to the electromagnet to release the diaphragm from the magnets for gravity closure.

This model is designed for "Standard" installation in a vertical position.

After an intervention, resulting in the closure of the diaphragm, to restore the release system, it will be necessary to ensure that the control unit is not in alarm and act on the lever of the pneumatic valve to raise the diaphragm. Additionally, for optimal sealing, a cleaning system is installed, which operates with each reset operation.
STFRPCMT / -O

The STFRPCMT model is equipped with 2 pneumatic cylinders that allow the lifting of the diaphragm and keep it in place. Therefore, it requires a detection, control, and functional indication system installed on the pipeline.

Therefore, a spark or flame detector must be installed upstream, which, managed by a control unit, will send the signal to the solenoid valve connected to the cylinders to close the damper.

Unlike the others, this model is designed for "Standard" installation in both vertical (STFRPCMT) and horizontal (STFRPCMTO up to Ø800) positions.

After an intervention, resulting in the closure of the diaphragm, after resetting the alarm, the damper restoration, in the open position, occurs automatically.

Additionally, on all models, it is possible to install the microswitch, both at the time of installation and afterwards.

For all models, except for STFRT, the installation of the fire detection system is provided; if this is not possible for various reasons, it is possible to install the fuse holder flange (72°C).

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NOT RETURN VALVE WHICH IS THE MOST SUITABLE?

Aircom check valve mounted on suction system

Following the technical analysis of the system, after examining the material and its KST, IF SUITABLE, you can proceed with the installation of the ATEX EN 16447 certified valve that complies with the current European Directive 2014/34/EU.

HOW TO DECIDE WHAT TO INSTALL:

For the installation of the damper, it is important to consider the following variants:

The diameter of the valve;
Check the type of certification: ensure that the damper can be installed in depressurised or pressurised systems;
The certification class: T1-T2-T3, the higher the certification class, the higher the degree of protection;
The type of material with which it was tested: metallic (aluminium) or non-metallic.
This element is important because the residual material of metallic processing has a significantly higher explosiveness coefficient than non-metallic materials.
The minimum installation distance from the Filter or Silos allowed: the necessary space is dictated by the valve's closing times, flame propagation speed, and pressure wave; the maximum distance increases the maximum reduced pressure (Pred,max);
Pressure drop: the decrease in pressure that the airflow undergoes passing through the damper, making it a very important factor. In particular, the AIRCOM project has been patented with the use of the Counterweight in the diaphragm, which balances the weight almost entirely, minimising the pressure drop caused by the installed Valve.

Once the installation has been chosen and planned, it will be necessary to provide the structure of the duct between the Filter and the Valve appropriately as described in the manual.

ACCESSORIES USEFUL FOR OPERATION

Some accessories that could be very helpful:

Capacitive Sensor, for which AIRCOM valves are already equipped, is installed at the bottom of the damper, it detects any deposited material and sends an alarm to the control software; installation is very easy and can also be done later without making any modifications to the valve;
Position microswitch, indicates the position of the valve and can be installed later without any modification.
Timed internal air flow cleaning system, its installation is according to your own needs.

The proper functioning of an extraction system is essential for processing quality and the protection and safety of people. In fact, AIRCOM is always looking for the best solutions and offers continuous support and technical training, even with online courses for customers and industry operators.

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NOT RETURN VALVE: YES OR NO?

LET'S FIND OUT TOGETHER!

In industrial suction systems, where processing residues are present inside the pipes, there is always a container where the processing waste is deposited; inside it, a fire can develop, increasing the internal pressure and causing an explosion.

WITHOUT SAFETY DEVICES:

The explosion causes a deflagration and destruction of the entire container, causing very serious damage to people and things nearby. Sometimes these damages can even be fatal.

WITH SAFETY DEVICES:

With the explosion, safety devices (such as Explosion Panels) installed in the Filter or Silos vent the explosion, avoiding the total destruction of the container. They signal to the devices present in the line how and when to act, thus reducing damage to people and things nearby.

PROTECTING THE WORK ENVIRONMENT FROM AN EXPLOSION:

As mentioned above, protecting the work environment from an explosion is done on multiple levels:

The first level is the protection of the Filter with the installation of Explosion Panels,
The second level is the protection of the work environment obtained with CHECK VALVES.

Check valves, tested according to the current European Directive 2014/34/EU and certified ATEX EN 16447, must be suitable for the type of processing material and its explosion coefficient KST. Their installation instantly interrupts the propagation of the explosion pressure present in the pipes towards the work environment.

IMPORTANT: For there to be real and safe protection of the system, it is necessary to have technical knowledge of the structure, both of the Filter or Silos, and of the processing material being aspirated and deposited into the container.

The types of waste material vary greatly in explosion power, and underestimating its explosion potential could result in lower protection than necessary, with disastrous consequences.

CONCLUSION:

A suction system without safety devices is very dangerous and at risk of very serious, even fatal accidents. This is the main reason why protection against container explosion is necessary: the installation of protections also saves the cost of the container and what is damaged in the explosion.

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AIR RECYCLING AND BURST PROTECTION

The most important aspect in a production environment, where people work to create products, is the pursuit of operating in the utmost safety to prevent harm to individuals, equipment, and the environment.

The extraction system is a component that has become almost ubiquitous in production processes. Ducts extract residues from processed materials using a vacuum system and direct processing waste into containers. Within these containers, materials accumulate, while clean air is released into the atmosphere or reintroduced into the working environment to recover heat and energy, especially during the cold season.

Residues from the material that accumulate inside the silos can be the trigger for an explosion and the bursting of the container.

The protection of the filter is ensured by the installation of Explosion Panels that safeguard the surroundings of the container. However, in cases where clean air is reused (returned to the working environment) through a specific duct, it is necessary to instantly stop the airflow in the duct towards the production area to protect the working environment, thereby containing the explosion externally.

The closure of the duct results in diverting the airflow into the open atmosphere, preventing damage to people and objects inside the working environment.

HOW TO DIVERT THE EXPLOSION

In response to market demands, Aircom has designed the solution to this problem, the explosion diverter DEVEX. The diverter is produced in various sizes, types, and with three diversion safety features:

1- SAFETY WITH MOBILE BAND

2- SAFETY WITH FLAME CONTROL UNIT

3- SAFETY IN CASE OF POWER FAILURE

ANALYSING THE VARIANTS

In the case of the mobile band, when the explosion flow arrives, the airflow is diverted. With the flame control unit, the airflow is diverted when the flame signal arrives. In the last case, power failure results in diverting the flow when electrical power is lost.

The intervention of DEVEX causes a diversion of the airflow, eliminating the possibility of the explosion effect reaching the working environment.

The diverter can be equipped with some accessories useful for its operation, such as the sealing gasket on the diaphragm or the diaphragm position sensor.

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EUROBOIS 2024

From 6th to 9th February 2024, you can find us in Lyon

AIRCOM awaits you at the Eurobois exhibition from 06/02/24 to 09/02/24 at stand 6 G86!

EUROBOIS is the main British wood fair that has been bringing together all industry professionals for over 30 years. On this occasion, we will have the opportunity to meet, learn about our products, and their application for your facilities.

Come and visit us! We look forward to seeing you!

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HOW AND WHY TO PROTECT THE FILTER OR SILO FROM AN EXPLOSION

The work environment is the place where the most serious accidents can happen, some of which can even cause death and the destruction of equipment and buildings.

In the industrial suction system, there is always a container where the waste material from processing is deposited. In the container, which can be the Filter or the Silo, there may be a developing fire, leading to an increase in internal pressure, causing an explosion. As can be understood, the explosion causes deflagration and the total destruction of the container, as well as damage to everything in the vicinity, both people and things, with the risk of mortal injuries. This is the main reason that makes protecting the container from explosion necessary. Protections save the cost of the container in case of an explosion and eliminate the danger of damage around the filter/silo.

HOW TO PROTECT THE FILTER OR SILO FROM EXPLOSION:

Vent or explosion panels are the main elements required for explosion protection.

These are elements that, at a certain pressure (which must be lower than the pressure sustainable by the Filter or Silo), break, allowing the release of the explosion pressure.

For safe functionality, they must undergo certification tests following British Standards EN. All explosion panels produced by Aircom comply with these regulations.

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MPORTANT: The use of panels, as a real and safe protection, is an operation that requires technical knowledge of both the structure, such as the Filter or Silos, and the processing material that is sucked in and deposited in the container.
This information is fundamental for calculating the quantity of anti-blast panels to be installed. The type of waste material is very varied, and underestimating its potential and burst coefficient can result in a smaller protection surface area than necessary, with the consequent disastrous effect of bursting, even if partly reduced by the panels installed.
By correctly calculating the surface area, and taking into account the waste material, volume and structure of the container, an accurate assessment can be made as to the correct surface area size of the panels to be installed in order to prevent any bursting from doing disastrous damage. Another important element is the positioning of the anti-explosion panels. If possible, they should be placed at the top of the container, to prevent them from being in a position where the burst could damage people in transit, in any case where there is generally no material deposited and there is atmosphere.

CHOOSING THE TYPE OF EXPLOSION-PROOF PANEL
The size of the panel should be sought according to the shape of the Filter or Silos. With the Pressure Filter, Standard Panels can be installed without an internal grille, while with the Vacuum Filter (Exhaust fan installed downstream of the Filter) the internal grille must be installed on the Standard Panel. If there is significant depression, it is a good idea to install a reinforced grille suitable for the system's depression, in order to avoid breaking the Panel during normal suction work.

USEFUL ACCESSORIES FOR THE OPERATION OF THE SUCTION SYSTEM
Exhaust panels do not need any special accessories. But it is important to be informed and to stop the suction system in the event of a possible burst, to avoid further damage, and this is possible by installing a sensor in the panel of the inductive AIRCOM type. It is very easy to install, and can be retrofitted without having to make any modifications. The choice of sensor must be a function of the environment where it is installed and the electrical voltage of the software to which it is connected.
The main types of sensors are: Inductive 24Vdc or Inductive 24Vac or the Atex version for environments with the possibility of burst triggering.

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PRESSURISATION SYSTEM FOR FIRE PROTECTION AND FIRE SUPPRESSION

The primary goal to achieve in the work environment is the safety of individuals. It often happens that fires develop within suction systems caused by:

Combustion of transported material
Sparks mixed with material in pipes and/or in the Filter

which could jeopardise the safety of individuals.

The best system to block the spread of fire in suction ducts is represented by FIRE DAMPERS/VALVES. However, another significant and not to be overlooked protection against fire is the installation of a SUPPRESSION SYSTEM in the pipes connected to the CONTROL SYSTEM, which detects the presence and/or passage of FIRE or sparks in the duct.

When the passage of a spark or fire is detected, the CONTROL UNIT or CONTROL SYSTEM activates the suppression system in the sector where the passage was detected.

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The extinguishing system is extremely important for the protection of the extraction system, of the working environment, but even more so for the people working inside it.

IT IS ESSENTIAL that the system works correctly, and for this to happen THE PRESSURE OF THE SHUT-OFF LIQUID AND THE QUICKNESS OF THE EXIT MUST BE SUITABLE AND INSTANT.

The "CPR" PRESSURISATION CENTRAL UNIT, designed by Aircom, guarantees a pressure of 4 bar instantaneously without the use of electric pumps. The central unit is very compact and needs to be supplied from the air line and water line at normal pressure (civil use). The CPR is equipped with a software unit, which can be programmed for the duration of the shutdown and resets automatically at the end of the shutdown. The shutdown system consists of 2 or 3 easily installed nozzles that are mounted in the pipe in a modular manner according to the pipe diameters. This system is fed from the PRESSURIZATION CENTRAL.

For more information on the Fire Fighting System, ask for our advice by phone (+39 0422 887386) or by e-mail (aircomtv@aircomsrl.it): we will be happy to give you all the information you need

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