Slot grid: types and purpose

To effectively ventilate the room it is necessary to solve a lot of tasks, among which the competent air distribution is one of the main ones. Slot grating is used in air distribution systems in public and industrial premises. Due to its discreet design, it can be completely invisible and not spoil the interior. As a rule, the grid is solid and flat, but, depending on the design, a construction with sidewalls is possible.

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The slotted ventilation grille has a high degree of induction, suitable for the supply and removal of cold and warm air, with the temperature difference quickly equalizing. Widely used in ventilation, air conditioning and heating systems of various types of residential and industrial premises with a ceiling height of 2.5 to 4 m.

The same device is installed in rooms with strict requirements for comfort and hygiene, for example, in hospital wards. The main functions of such grids are the uniform distribution of air from the ventilation or heating system throughout the room, as well as the removal of air in the opposite direction, from the room to the ventilation. Ventilation systems, and, consequently, slotted gratings, are in great demand, and often not from personal preferences, but according to the requirements of fire safety.

Types of slot gratings

There are three main types of slot gratings:

• APC - inlet grilles are slit regulating, intended for supply and uniform distribution of air in rooms of various types through ventilation and air conditioning systems with constant and variable air flow. Ensure a stable flow of air in the cooling mode. They are equipped with perforated shutters and rotary blinds for regulating airflow in the range from 25 to 100%.
• ALS - air inlet unregulated slotted grille, without rotary blinds.
• ABC - exhaust grilles without flaps and blinds.

These structures can have a complex T-shaped or angular shape. Supply gratings are used in conjunction with static pressure chambers (KSD). The exhaust slotted grille ABC is installed in the kit with the air flow regulator (DAC). For controlled supply grids, the use of the DAC is impractical, since the air flow is controlled by means of dampers and shutters. All grids are mounted according to the level of the false ceiling, joining the air ducts.

Design

The slotted grating consists of an aluminum casing with horizontal holes in the number from 1 to 6. A cylindrical roller is mounted inside the casing, with which the direction of the air flow is adjusted.

As a rule, slot gratings are used with static pressure chambers (KSD), which allow to stabilize the flow and regulate the air flow. The width of the slits varies from 8 to 25 mm. The length of the grid can be from 2 cm to 3 m (if necessary, set-up structures are used, which allows them to be mounted in a line of any shape).

Slot gratings are characterized by a high degree of induction, excellent aerodynamic qualities and attractive design. These devices allow you to quickly heat air flows, reduce the noise level of the ventilation system, eliminate drafts and form stagnant zones. They are installed in suspended ceilings or wall structures, almost not noticeable in the interior. The minimum installation height is 2.5 m.

Lattice cast iron slit

A separate kind of devices, not related to ventilation or conditioning, are cast iron gratings used in drainage systems. Such gratings are a detail of the exterior of a certain area with a surface drainage. They are made of cast iron, close to steel strength, and can be used even in areas with automobile traffic and load of 25 tons per square meter. They cover drainage trays made of concrete, plastic, polymer concrete, other materials. Manufactured by injection molding with a different load class.

These grids protect storm sewers and other surface drainage systems from blockages. They are irreplaceable in the spring, when, after melting snow in the drainage channels, various kinds of garbage are carried by water streams: soil, branches, leaves and other debris (all this is delayed by cast iron drainage grids).