Danfoss automatic air vents: characteristics and purpose

In the water heating system, especially closed, there must be only water or another coolant. But the air is so insidious that it can penetrate almost anywhere. The solution to the problem is the use of an automatic air vent that significantly simplifies life for homeowners and service workers.

An automatic air vent is a device that discharges air outside, which is very small in size, but helps to cope with extremely unpleasant situations. Occasionally it is found that the heating devices operate at full capacity, however, part of the pipeline is stubbornly "unwilling" to warm up. This trouble arises in both old and new homes.If it is not caused by errors in the design and installation of the system, the cause of the deceleration of heat, most likely, is a plug from the air. Only a mechanized reset allows you to quickly get rid of the problem.

But the problem is that air accumulation in the system can occur very often, at night or in the absence of people for a long time. Then only modern automation helps out. In addition, even if it is necessary to release air bubbles only when the system is filled and maintained, the control valves can be located high or uncomfortable. The undoubted advantage of automation is reappearing. The main thing is that the characteristics of the equipment used meet the necessary requirements.

Externally, the automatic air vent looks like a metal valve, the body of which hides the float and a set of levers. When the device is in the "closed" position, the float is located at the top of the cavity, as there the water level keeps it. But it is necessary to arise an air bubble, as it begins to move to the exit of the pipeline. Water after air goes down, and the float departs there too.When excess air leaves the liquid, it immediately fills all the space reserved for it by the designers and locks the regulator in the initial position.

Most designs involve the installation of a check valve or locking reinforcement products. After all, only they allow you to simplify the removal of the valve and the replacement or repair as needed. On the market there are many brands of automatic air towing. And almost all of them meet the standards of the Russian GOST.

Automatic air tappers are divided into the following:

• connected with radiators;
• straight mounted;
• angled;
• special category;
• made of copper;
• with brass or steel casing.

To buy a quality air outlet, you need to carefully monitor its appearance. The slightest visual defects, erased letters or words, minor deviations from the norm speak either of a fake, or a used device, or of a manufacturing defect. It is important to understand that the equipment of leading brands can not be several times cheaper than the average for the market.Getting acquainted with the design of the mechanism and its geometry, you need to pay attention to their compliance with the conditions in which you plan to use the device. Only then can normal operation and safety be guaranteed.

The automatic air blower DN15 can only work in conjunction with pipelines with a cross section of 1.5 cm. The design features and the material used directly affect the price, and high-quality products cannot cost less than $ 5. Danfoss supplies the Russian market with air vent series Wind and Eagle. The technical parameters are completely identical, the difference is only in appearance. The company prefers to use brass; its cases are certified for pressures up to 10 bar when heated to +120 degrees.

It is important to take into account that along with the standard 1/2 ”thread format, the company produces air traps designed for 3/8 fasteners, which are marked as DU10. The cost of the device is almost independent of the connecting size. But in the installation work to ignore this fact would be fundamentally wrong.

It is recommended to install automatic air vent valves, including Airvent, PN10 DN15, VE120, in such places as:

• the highest points of the heating circuit;
• end segments of dead ends of the heat pipe;
• binding of boilers is a security group.

It is customary to put by-pass devices on the collectors in close conjunction with manometers and valves that are activated during emergency. Such a scheme provides for air bleeding if the coolant fills the water jacket, or draining water when the heat generator is disconnected from the external circuit. As well as drains can be added to the pump that provides circulation. But we must not forget that not all water pumping devices are compatible with such additions. Interested in this moment is at the stage of choice, so as not to throw money down the drain.

Directly attached air vent is recommended to be installed in the highest parts of the heating system. It is there that the bulk of the gas is collected, and its manual discharge to the outside is difficult. The angular option is used where you can not connect to a direct pipe, for example, due to the horizontal placement of the pipe.Since no other constructive differences, except for turning the nozzle, are not made, such decisions and classical constructions mutually replace each other. Radiator vent can be an effective alternative to the traditional crane construction Mayevsky.

Often used in addition to the air vent valves with flap spring effect. It is no coincidence that Danfoss prefers brass when making tap-off devices. Copper is too expensive. It creates a seemingly contradictory combination with a simple steel pipe. Steel is too easily corroded and deteriorates.

The Airvent model is designed for a typical connection size (½), the maximum warming up of the incoming water is limited to +110 degrees. Therefore, for the central heating circuits, where, during testing, the coolant heated to +130 degrees is supplied under pressure, such a device is not suitable.When buying products from a Danish company, consumers will definitely not be disappointed with the work of the heating system. It is recommended for the greatest reliability to equip the segment between the air vent and the air-collecting pipeline ball valve. This element minimizes the risk of air bubbles overfilling the heating circuit and reduces the need for diverting device starts.

Details about automatic air vent for heating, see the video below.