One of the most common and at the same time the simplest elements of ventilation is a grille. It performs two main functions - mechanical protection of the air duct from the penetration of foreign objects and regulation of the throughput of the mine. Standard vent. the grille with a check valve, the photo of which is presented below, demonstrates the classic plastic version of this component. At the same time, there are different structural and functional options for gratings that can be used both in supply and supply and exhaust systems.
The device and the principle of operation of the design
The basic design is made of two main parts - the grating itself with ribs and the valve system, which can be implemented in different ways. Adjustable models are usually equipped with a movable mechanism.blinds, through which the user can adjust the throughput. The main advantage of this design is the possibility of individual regulation of the movement of air flows. Less common are unregulated vents. grilles with a non-return valve, the ribs of which are firmly fixed and cannot be changed in position. But from the inside, the valve can completely block the air circulation. The most practical and convenient to use is the inertial grating, which independently blocks the channel at the moments of a certain intensity of air mass movement. The disadvantage of such a system is the possibility of one-way regulation of flows - only as an exhaust system for removing exhaust air.
Types of construction materials
The popularity of plastic models has already been noted, which is due to the practicality, ease and convenience of installing this ventilation element. Modern plastic is also distinguished by durability and a variety of design solutions. Nevertheless, in terms of its reliability and mechanical resistance, it loses to metal structures.
Grids made of galvanized steel and aluminum serve for about 10 years, do not deform and protect the channel from all sorts of physical threats. However, steel models in conditions of high humidity and chemical influences can be affected by corrosion - even with a galvanized coating. Therefore, an aluminum vent should be used as the optimal solution. grate withcheck valve, which also has a solid margin of safety and a service life of more than 10 years, but at the same time its structure is not afraid of moisture and temperature changes.
Classification of gratings by installation site
There are three main types of ventilation grilles: internal, overflow and external. Just plastic models are more often used for interior arrangement of premises with ventilation ducts. Structures of this type are integrated into the openings of wall air ducts, ensuring optimal dispersion of flows. Such devices include a ceiling ventilation grill, which can provide interfloor air exchange.
Transfer structures are specifically focused on organizing the exchange of air masses between rooms. In order to maintain the sound and light insulation of the rooms, the blinds of such grilles in some modifications have a V-shape.
Models for outdoor installation, respectively, are installed from the street side on the walls. They mostly serve to protect the ventilation ducts from the penetration of precipitation, dirt, debris and small rodents, therefore they are often made of metal. For such gratings, the presence of a check valve is especially important, which in winter will not allow the passage of cold air.
What to consider before installing the grate?
It is desirable to deal with the organization and arrangement of ventilation ducts at the stage of designing a house. In particular, from the point of view of the integration of vent. lattices with reversevalve, the following aspects will be important:
- The appearance of the design - form and stylistic execution.
- Specific grid placement points.
- Grid type in terms of regulation.
- Dimensional design parameters - the opening must match the dimensions of the lattice.
- The presence of equipment or communications near the ventilation channel - in particular, the thermal energy from the working units should not affect the circulation in the serviced mine.
Design installation methods
Grid placement configuration is very important as it will affect both the aesthetic qualities of the structure and its reliability. There are four options for installing the vent. grilles with non-return valve:
- Embedded method. Surface mounting, in which the lattice frames are simply screwed to the wall with self-tapping screws.
- Integration into the opening. In this case, the lattice structure is deepened into a prepared niche in the wall and twisted in it from the back side.
- Side mounting. The box is also built into the existing end, after which it is fastened with self-tapping screws to the side surfaces of the wall opening.
- Installation in profile structure. Initially, a supporting metal base is installed in the opening, to which the grille is then fixed by means of special clamps.
Installation instructions
The installation process is usually carried out in the followingsequences:
- Preparation of tools and fasteners. At a minimum, you will need a set of screws, a hammer drill and an electric screwdriver.
- The attachment points are being marked.
- Holes for installing hardware are being formed.
- It is necessary to disassemble the design of the vent. grids with non-return valve. Reviews note that systems with a minimum set of elements are the most reliable - for example, models from the lattice itself and blinds.
- A frame is mounted in the ventilation shaft, which should be screwed to the wall with screws.
- The main structure of the lattice and its blinds are installed in the prepared box.
When is the device used?
The grill itself is used as an alternative for supply and exhaust systems operating in combination with fans. Such systems are less productive and not so convenient in terms of control capabilities, but they provide natural ventilation with control elements. For example, a vent grille with a non-return valve for an exhaust hood in the kitchen can perform the task of removing polluted air and providing fresh air. Depending on the device model, the user configures it either for offline operation or for a specific mode in accordance with current needs.
Construction maintenance
Frame elements of ventilation openings are most susceptible to various kinds of negative impacts. Therefore, it will not be superfluous to periodically care for the structure,taking into account the characteristics of the material of manufacture. Yes, a metal vent. a grate with a check valve for the hood will require comprehensive care, since both its external and internal sides will come into contact with aggressive media. If it is installed at the exit from the kitchen, then it will be especially necessary to clean the surfaces from soot and visible dirt. The same nuance will be important at the installation stage when choosing the installation method. Mounting with a carrier box is the best solution for exhaust grilles, as it facilitates the removal of the structure for cleaning the internal surfaces.
