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More than 100 years innovating in industrial ventilation solutions

More than 100 years innovating in industrial ventilation solutions

More than 100 years innovating in industrial ventilation solutions

More than 100 years innovating in industrial ventilation solutions

Industrial ventilation

Since 1920, CIRIGLIANO SA has been constantly seeking continuous improvement at all stages of the process, from design to final production. Our production plant is located in the city of Junín and covers the following areas:
  • Administration
  • Tooling
  • Fan Testing Laboratory
  • Model factory
  • Bronze and aluminum die casting room
  • Design room
  • Grey casting room
  • Electric motor factory
  • Mounting
  • Offices
In each of these areas we implement rigorous quality control, which allows us to guarantee products and services with the highest level of effectiveness. Our commitment to continuous development, our vast experience and our focus on constant improvement are the characteristics that make CIRIGLIANO a leading Argentine industry in the manufacture of axial, helical, centrifugal and mixed-flow fans.

Axial fans with aerofoil

With variable pitch blades

In the construction of an axial flow fan there are two factors of fundamental importance: the design of the blades and their section.

These two aspects increase machine performance by 88%.

Therefore, it is important to know a brief description of wing-shaped blades, also called aerofoils .

A blade section can have different shapes. It typically looks like that shown in Figure A, and ranges from a relatively wide leading edge to a very thin trailing edge.

The length of this section is called a chord .

The AA midline shape, running from the highest to the lowest surface, is the curvature . The angle formed by the direction of rotation and the surface is called the angle of incidence or pitch .

Chord, curvature and pitch angle are three factors that influence blade performance.

The diameter of the shaft also affects the pressure generated.

Fans with larger shafts typically develop higher pressures for the same peripheral speed compared to fans with smaller shafts, although this factor does not reduce airflow.

The purchase price for the same application is higher for fans with large shafts.

If the speed and the diameters of the axes and periphery are the same, the pressure developed depends on the total surface of the blade. However, there is a maximum pressure limit that is defined by the interference of one blade with the other if they overlap too much.

The number of blades is irrelevant in this respect: a small number of wide blades is equivalent to a large number of narrow blades, provided they have the same chord and the same total surface area.

The volume of air depends on the angle of incidence. A wide range of volumes can be obtained for a specific speed and diameter, depending on the different angles of incidence.

Figure B shows a construction method that allows different volumes to be obtained by adjusting the angle of incidence.

This device allows the blades to be placed at any angle to generate the required volume.

Aerofoil blades

The uniform casting of the blades allows for maximum fan efficiency due to its aerodynamic profile.

The masses include an iron insert where the motor shaft and keyway are held.

All the blades and the propeller mass are cast with silumin, which modifies the structure of sodium-based silicon when fusion occurs.

Extraction system with axial and helical extractors

The extraction ventilation method does not only consist of extracting a certain volume of air per hour. To achieve adequate ventilation, intake points and natural openings must be arranged in such a way that fresh air is distributed throughout the space. Typical examples of correct and incorrect assembly are shown in Figures 1 and 2. If both side walls of a building allow access to the atmosphere, the simplest arrangement is to install the axial fans on one wall to release the air to the outside, and place the air inlets on the opposite wall, spaced as convenient. In case only one of the side walls has access to the atmosphere, a possible solution would be to channel the extracted air along the inner wall, as shown in figure 3. If the distance between the side walls is considerable, central extraction is usually the most convenient option, because the air path is reduced, and the likelihood of short circuits occurring is reduced. This type of extraction is usually carried out through a central suction channel, as shown in Figure 4. However, if the buildings are single-storey, mounting extraction units on the ceiling, as shown in Figure 5, may be a simpler solution. Typically, these types of units incorporating a propeller fan require less capital for installation and have lower operating costs than a longer ducted system. Upward-directed convection currents increase their efficiency and prevent any interference with cranes, bridges or similar equipment. As can be seen in Figure 2, the ventilation of a building is more homogeneous if several extraction fans of moderate dimensions are used and arranged appropriately, than if a single high-capacity fan is used. When the problem is high temperature, it is necessary to renew the hot air that accumulates in the upper part of the building. If the temperature is maintained in this upper stratum, the hot air gradually spreads downwards, which reduces the natural ventilation of the air that has been heated at the working level. In these cases, the hot air is usually extracted from a high level, through the end of the ridges or through the roof. The natural air inlets, on the other hand, are located at a lower level. The faster the warm air is extracted from the top, the faster the heat is removed from the work area, and the incoming air is distributed more easily throughout the space. In some cases, it is necessary to locate the extractors at ground level. This happens when heavy fumes are released into the atmosphere, for example where spray painting is carried out. This location was chosen because fumes are usually heavier than air.
  • AEROFOIL FANS
  • ROOF EXTRACTION UNITS
  • HELICAL FANS
  • SPECIAL FILTERING UNITS

Short-case aerofoil axial fans type S

Aerofoil fans are axial type equipment. They are the most widely used worldwide due to their safe operation and exceptional performance. The variety of equipment available allows for countless applications of ventilation, air conditioning, heating, cooling and drying, among other possibilities. There are various types and sizes, ranging from 300 to 2410 mm in diameter. The performance range covers air volumes from 350 to 250,000 m3 per hour, with a maximum pressure of 500 mm of water. By using a patented adjustable pitch impeller, any desired combination of volume and pressure can be achieved. The simple design of these units provides direct ventilation, makes installation easy and saves space. CIRIGLIANO offers fans for spaces with high humidity levels, high temperatures or explosive atmospheres.

Single-stage fans with aerofoil and long L-shaped box with indirect coupling

General purpose aerofoil fans do not have rotating blades. The impeller rotates within a cylindrical housing and is mounted directly on the drive motor shaft. There are two types of casing:
• All fan sizes feature short S-type shrouds, which protect the impeller only. This type of housing is attached to the end of a ventilation system.
• Fans ranging in diameter from 300 to 1520 mm are also supplied with long L-type casings, which cover the entire length of the impeller and motor and are installed in the air ducts. This type of enclosure features an external terminal box and two inspection doors.

Two-stage fans and multi-stage fans

The use of counter-rotating units allows considerable pressures to be obtained. In this system, two or more fans are placed in series with blades facing different directions. The blades rotate in opposite directions and are directly coupled to their corresponding motors. Fans can have 2, 3, 4, 5 or 6 stages, and the pressures generated are, respectively, 3, 4, 6, 7 or 9 times higher than any multi-stage unit not having these guide vanes. Two-stage counter-rotating units in a single casing are supplied in diameters up to 1220 mm. Counter-rotating, series-coupled multi-stage units can also be used.

BIFURCATED FANS

Our aerofoil fans have motors that are isolated from the air stream. These devices circulate air with a maximum temperature of 80°C and ventilate atmospheres loaded with humidity, smoke or dust. In addition, we manufacture custom fans with special requirements that can operate at a maximum temperature of 205°C. Typically, the design of these units is similar to that of ordinary single-stage fans. Its engine is located inside a cylinder that separates it from the environment to be ventilated and takes air from the uncontaminated environment that is used to cool it. These units are manufactured in four different sizes, with diameters of 380, 480, 610 and 760 mm.

Main and auxiliary fans for mines

Our single and two-stage aerofoil fans operate in counter-rotation and are used for subway mine auxiliary ventilation and tunnel boring. These devices take up very little space due to their compact design, which allows them to be coupled directly to the ducts. In addition, since they are lightweight, they can be hung on tunnel walls. A small set of single and two stage fans is sufficient to handle a wide range of pressures. We also manufacture explosion-proof fans for working in the flammable atmospheres of mines, where conditions are more rigorous. These devices have diameters ranging from 300 to 1500 mm and operate at pressures between 50 and 60 Hz. They can be mounted at an altitude of up to 4,500 m above sea level.

CLOSED CIRCUIT FANS

These fans are used to continuously circulate air inside a closed chamber, and their motor remains outside the environment. They are commonly used in drying machines and refrigeration chambers, among other applications, and are used to recirculate air up to a maximum temperature of 205°C. The fan mounts onto a circular mounting plate that is bolted to a hole in the wall or ceiling of the room where it will be installed. The motor is located on the outside of the mounting plate.

Maxcess fans for ships

The Maxcess fan model, created by CIRIGILIANO , has been designed for use on ships. These devices allow the fan to be placed outside the duct system to perform service tasks, without intervening in the installation or electrical connections. The fan is hingedly mounted in a protective box that connects to the drive system. The joints between the fan and the protective housing are hermetically sealed. The power outlets are connected to a terminal box located on the outside of the fan housing. This type of equipment also has external lubricators. In recent years, Maxcess fans have been installed on a large number of ships being built in countries around the world.

Smoke extraction fans

At CIRIGLIANO we manufacture corrosion-resistant axial fans with aerofoil for use in smoke extraction systems. The impellers of these fans are made of fiberglass, and have reinforced plastic casings. The motors and their mounts are covered with a thick protective coating of sealing and corrosion-resistant compound. Plastic has great mechanical strength and is relatively light in weight. These fans have the same operating characteristics as typical aerofoil fans and can be designed as multi-stage fans to cope with high pressures. These units are manufactured in four different sizes, with diameters of 300, 380, 480 and 600 mm.

Fans for fume hoods

We offer a wide range of fans for laboratory fume hoods and other extraction systems requiring small fans. These fans are corrosion resistant and feature rigid polyvinyl chloride molded covers. They have plastic impellers, with hermetically sealed motors and accessories in which a corrosion-resistant compound is used. These types of fans are connected to the piping system using plastic connections. In terms of performance, they allow the displacement of air volumes ranging from 250 to 2000 m3 per hour. These units are manufactured in four different sizes, with diameters of 150, 190, 240 and 300 mm.

Variable pitch varofoil axial fans in operation

These fans are specifically designed for water cooling towers and chemical industries where liquid temperature regulation is of critical importance. The blade pitch angles can be adjusted during fan operation to provide different volumes of air as required by the liquid to be cooled. A pneumatic mechanism modifies the angle of the blades according to the thermocouple or thermostat. The angle variation can be adapted to the requirements of the system. This type of equipment offers great advantages, since it allows for extremely precise air control, superior to that obtained using fans with variable speed motors. These units are manufactured in four different sizes, with diameters of 1220, 1520, 1900 and 2410 mm.

General purpose aerofoil fans do not have rotating blades. The impeller rotates within a cylindrical housing and is mounted directly on the drive motor shaft.

They are manufactured with two types of casing:

  • All fan sizes feature short S-type shrouds, which protect the impeller only. This type of housing is attached to the end of a ventilation system.

  • Fans ranging in diameter from 300 to 1520 mm are also supplied with long L-type casings, which cover the entire length of the impeller and motor and are installed in the air ducts. This type of enclosure features an external terminal box and two inspection doors.

A-Series Units

These units have diameters of 300 and 1220 mm and operate at flow rates between 1700 and 46500 m³/h. They are designed for minimal airflow restriction and feature a wide protective hood. These rooftop units solve the air outlet restriction generated by wind pressure. They require a three-phase power supply of 220/380 v - 50 c.

B-Series Units

These units are supplied for installation on flat or pitched roofs and can be fitted with automatic closing devices to reduce heat loss. They are constructed of welded and hot-dip galvanized steel. Their L-shaped housings feature an outer terminal box and two manhole doors. These fans are manufactured in seven different sizes with diameters ranging from 300 to 1220 mm. Their extraction capacities vary between 1020 and 40800 m3 per hour. Fan motors can be positioned to allow lubrication from above or below the ceiling.

Vertical injection units

These units provide a high velocity vertical stream that expels the extracted air to a considerable height above the ceiling. The use of these devices is recommended to quickly disperse vapor, fumes or contaminated air. To extract air directly through the roof, axial fans are used as long as they have no intake resistance. If located at the end of a ducted extraction system, these units use aerofoil fans. The fans have a fiberglass screen and automatic closures that protect them from the elements. Seven fan sizes are manufactured, with diameters ranging from 300 to 1220 mm. Their extraction capacities vary between 1530 and 39100 m3 per hour.

Low silhouette units

These streamlined, sleek-looking units are often used in buildings where aesthetics are of importance. They have a low aluminium hood and can be coupled to helical or aerofoil fans. Six fan sizes are manufactured, with diameters ranging from 300 to 920 mm. Their extraction capacities vary between 950 and 39100 m3 per hour.

E Extraction units

The E-Series roof extraction units have been specially designed for agricultural buildings. They are made from welded, hot-dip galvanised steel and can be fitted with automatic closures to prevent downdrafts. Their price is very low and they are easy to install. These units are manufactured in four different sizes, with diameters of 300, 380, 460 and 600 mm. Their extraction capacities vary between 1020 and 39100 m3 per hour.

LMF Units

These units operate with a mixed flow of five sizes. They are made of galvanized steel and have an aluminum impeller. Its direct drive works with single-phase and three-phase motors. They have an operating range of 972 to 19,080 m3 per hour.

C -Series Units

These rugged, heavy duty units operate on axial flow and are constructed from galvanized steel. They are low cost and have a long service life. Seven fan sizes are manufactured for flow rates from 1020 to 47,500 m3 per hour.

Mixed Flow Units

The quality of Cirigliano axial fans is recognized worldwide. This new range of mixed flow roof extraction units combines the most outstanding features of centrifugal and axial fans. The mixed flow impeller has an extraordinary design. It has excellent pressure characteristics and a reduced noise level that does not generate annoying frequencies. Furthermore, its structure facilitates direct extraction through the roof and allows these units to be used as the final element of systems that require water pressures of 25 mm or higher. These units are lightweight and made of plastic. They are low in height and have an aerodynamic profile. These fans are manufactured in five different sizes with diameters ranging from 950 to 19 720 m 3. The range of fans we manufacture includes models with diameters ranging from 190 to 1220 mm with flow rates of 460 to 53,550 m3 per hour of free discharge. These fans use squirrel cage type induction motors whose characteristics meet all the requirements of international standards, as described in our catalogue.

Corona fans and protection

Our 190mm and 230mm axial fans are mounted on a combined crown and protective grill assembly constructed from an aluminum alloy. The mounting holes in the mounting crown have rubber sleeves to reduce noise transmission. The 230mm model features a terminal box above the mounting crown. The 190mm fan has a 46cm cable coming out of the motor.

Crown Mounted Fans

These fans can be built with explosion-proof motors and special motors for humid locations and high temperatures. The motors of these units are usually manufactured with pressed steel mounting rings. One of its special features is that the impeller and motor have elastic suspension. Mounting arms for fans up to 920mm in diameter are supported by rubber cushions to reduce noise transmission. These fans are manufactured, with diameters ranging from 300 to 1220 mm.

Crownless Mounting Fans

These fans are supplied without mounting rings when they are to be attached to customer appliances or when they are to be installed in air ducts. All available sizes feature elastic suspension, except in the case of 1220 mm diameter fans. We also manufacture the mounting cross plates that these units carry.

Roller shutters

The fan current opens the louver shutters, which close when the fan stops. Louvered shutters reduce fan performance by about 15% and should not be used with low speed fans. Due to their lightweight construction, it is not recommended to use louver shutters when air speed exceeds 5 or 6 m per second. The blinds are made of aluminium and are mounted on a steel frame with four support legs. The finish of the shutters is in gloss grey.

Butterfly and windshield registration

Butterfly dampers exclude reversible currents and reduce fan performance by only 5%. The current from the fan causes the shutter flaps to open, and the shutter flaps close when the fan stops. Rattling noise is avoided by using rubber bearings. Shutters exposed to strong winds must be fitted with the windscreen shown in the image. This windshield reduces fan performance by another 20%. The shutter finish is gloss grey and the windshield is galvanised.

Wall hood

Wall hoods protect the outlets of fans installed in exposed locations and prevent strong winds from reducing fan performance. The use of wall hoods reduces air flow by approximately 10%. They are constructed from mild steel with welded seams and square fixing flanges. The finish is galvanized.

Cameras for Fans

Fan cameras are enclosures manufactured to mount over ducted fans. Its design allows radial air flow to and from the blade tips. They have a diaphragm plate that holds the fan and has square fixing flanges on both sides. The cameras have an external terminal box and two service doors. The terminal box does not fit in the case of explosion-proof fans. The finish is galvanized.

Loss Grids

These grilles are elegantly designed screens that are installed at air inlets or outlets and offer little resistance to the flow. Although they do not allow direct vision through their openings, they have a 60% uncovered surface. They are square in shape and have the frame already drilled for fixing. The finish is in glossy grey.

Diaphragm Plates

These plates support diaphragm-mounted fans used in ducts, heaters, or coolers, among other applications. They have holes for the fan arms and their fixing. Its size depends on the diameter of the blades. Airflow is generated at the tips of the blades, ensuring fan performance. Its finish is glossy grey on an anti-rust minium primer.

Small Axial Fans with Aerofoil

We manufacture five types of small aerofoil fans that are used to cool electronic devices and are also used in other applications that require small fans.

These units are manufactured in five different sizes, with diameters of 96, 120, 150, 190 and 240 mm.

Please refer to our specific catalogue where the working curves are shown.

SPECIAL FILTERING UNITS

These continuous service units allow working outdoors and are used for the injection and extraction of air in industrial plants where fluid filtration is essential. They feature axial fans with washable and renewable filters, as well as fixed shutters that prevent water from entering. They are manufactured in sizes ranging from 300 mm to 1200 mm in diameter and operate at flow rates of 1,000 to 100,000 m3 per hour.

AEROFOIL FANS

Aerofoil fans with KG guide vane and without KL guide vane are long-case units. All its parts are cast, and the motor casing and guide fins are constructed from aluminum alloy. These units are manufactured in four different sizes, with diameters of 150, 190 and 240 mm. They operate with flow rates of 400 to 5000 m³ per hour and pressures of 0 to 50 mm CA, depending on the rotation speed.

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