Is it necessary to install a check valve in the flue, and does the check valve in the flue left by t

There is no need to install it again, the common flue check valve.

All of them are check valves that close by the weight of the valve plate.

Using the exhaust air force of the smoke machine to blow open, this valve is actually equipped with one on each smoke machine.

Its advantage is that the greater the forward pressure in the flue, the better the sealing effect, and the disadvantage is that the weight of the valve plate is too light and it is difficult to close tightly. Another disadvantage is that the effect is not ideal when applied to the main and auxiliary or transformer type common flue. Because these flues are negative pressure flues, the check valve will be sucked open when the negative pressure is too large.

There are also a small number of check valves on the market that are equipped with springs to increase the closing force, and use the spring force to counteract the negative pressure of the flue and prevent it from being sucked open. Its closing effect is better than the former, the disadvantage is that it is affected by the spring closing force, and it is often not opened in place, and the smoke exhaust loss is very large.

At present, the better flue check valve should be an electric fume closed valve, which also uses spring force in the closed state and does not consume electricity; The smoke machine is turned on by an electric motor or an electromagnet.

Overcome the spring closing force to open. Due to the use of electric opening, a large closing spring can be used to resist the influence of negative pressure and keep the valve closed; It can be opened in place again, and there is no smoke exhaust loss.

That's a must.

Whether it is connected to the public flue or an independent flue, it needs to be installed, and the public flue is equipped with a check valve to prevent odor and independently prevent outdoor air from the city.

The flue check valve is installed on the flue to prevent the oil smoke from entering the home through the flue, and now many range hoods have their own check valves, but this kind of self-contained check valve has the problem that the baffle is not tightly sealed, so it is necessary to install the flue check valve, but the smoke pipe is too long or the exhaust air volume of the range hood is small, and it is not recommended to install it. It is not difficult to install the flue check valve, and the check valve can be fixed on the common flue by snapping.

Summary. Hello; Kiss; The flue check valve left by the developer does not need to be replaced. It is not recommended that you replace the original one, and if you do, you don't want to replace it.

1. The original things of the developer can be replaced in the decoration: but it should be noted that once it comes to the appearance of the surface, it should be paid attention to: for example:

The window can be replaced, but the color must be consistent with the original: the check valve of the flue is completely OK, but it should be noted that after the replacement, it is necessary to pay attention to the installation of the seal, so as not to cause the oil smoke to leak out due to improper installation, and the gain outweighs the loss.

Hello; Qinshanbi; The flue check valve left by the developer does not need to be replaced. It is not recommended that you replace the original one, and if you do, you don't want to replace it. 1. In the decoration, the developer's original things can be replaced

However, it should be noted that once it comes to the appearance of the surface, it should be noted: for example: the number of windows can be changed, but the color must be consistent with the original

The check valve of the flue is completely OK, but it should be noted that after the replacement, it is necessary to pay attention to the sealing xing of the installation, so as not to cause the oil smoke to leak out due to improper installation, and the gain outweighs the loss.

Kiss; In addition to replacing the check valve when moving into a new house, we also need to simplify and replace it when we have used one check valve for too long. Generally, the failure rate of the check valve is very low, and it can be used for many years under normal circumstances, so it is generally only replaced when the range hood is replaced and the flue is cleaned. If it is a poor quality check valve, if it is found that the range hood cannot exhaust smoke normally, the smoke exhaust efficiency is low, and the kitchen smoke smell is heavy, we should check the check valve and smoke exhaust pipe, and replace the check valve.

1. It can better block the backflow of oil smoke. Because in most of our residential buildings, the kitchen flue is shared, the sealing between the kitchen hood and the flue is not very good, and it is easy to produce anti-odor, which is one of the main reasons why we can smell the food in the corridor. Check valves can help us prevent oil fumes from backing up into our own homes.

2. The flue check valve is an automatic valve, which is mainly used to prevent the oil smoke from flowing backwards, only allowing it to flow in one direction and preventing the air from flowing in the opposite direction. When the range hood starts to work, the airflow with oil smoke passes through the air inlet and the guide surface, pushes open the one-way valve plate, and discharges the oil smoke into the public flue; When the range hood stops working, the check valve automatically closes under the action of gravity, so that the oil smoke channel is isolated from the public flue, and the oil smoke in the public flue will not flow backwards.

3. Prevent mosquitoes, moths and other flying insects from entering the kitchen and affecting kitchen hygiene. In short, flue check valves can make us more worry-free and safer when cooking. The main function of the flue check valve is to prevent the backflow of oil fumes.

Many homeowners find that in kitchens without check valves, they can often smell the cooking fumes of their neighbors. The reason for this is that the flues of residential apartments are shared. If the check valve is not installed, the cooking fumes of other people's homes will flow into the kitchen in reverse through the original smoke exhaust pipe, causing fume pollution.

4. The flue in the kitchen is shared, and many people know that when cooking upstairs and downstairs, there will always be an attractive aroma of food. The reason for this peculiar smell is that the range hood and flue are not well sealed, and the function of the check valve is to prevent the kitchen flue from backing through the range hood, thereby preventing the backflow of oil smoke. In fact, this flue check valve can not only prevent the flue gas from affecting life, but also serve as a security guard in your home.

It can effectively prevent the toxic exhaust gases and fumes emitted by other people's homes in the flue of the masses from pouring into their own homes.

5. The flue check valve also has good fire performance, especially for some check valves made of metal, which can better ensure its safety performance, and can also solve the hazards of mosquitoes, moths, flies and other insects to a large extent, and can provide a safer and more hygienic living conditions for the home.

There are great benefits, because this can make the kitchen more clean and hygienic, and then it is very convenient to clean, so that the smoke in the kitchen can disperse through the pipe, and it is not easy to cause the kitchen to be too greasy, so it is safer.

This can prevent odors in the room, prevent the backflow of oil smoke, and prevent some small mosquitoes, which can effectively prevent some small insects from entering the kitchen, and can better ensure cleanliness and hygiene.

It can make the smoke in the kitchen go out faster, and it can also make the smoke in the kitchen less left. It also allows the smell in the kitchen to spread faster. It can also contribute to the overall use of the kitchen. It can make the kitchen air fresher.

The advantage is that it can prevent smoke from returning to the home, can prevent smoke from flowing backwards, can better exhaust smoke, can prevent the outside air conditioning from entering the home, and can prevent the wind from entering the home.

This can play a better role, and there will be no smoke backing, and the fluidity of the oil smoke is very high.

In order to be able to exhaust the smoke well, so that the smoke can be discharged, everything is relatively clean, which is very good.

Personally, I think this is purely for everyone's safety, after all, I think it's a good measure.

Because in this way, some people will not be able to enter the home pipeline, and they can also be isolated, so this behavior is also very good and convenient for everyone's life.

If it is not installed, it is likely to cause this smoke to run around, in this case it will cause air pollution, so it must be installed, and only when it is installed can we ensure everyone's safety.

Hello dear, happy to answer your <>

The flue check valve can be installed vertically The check valve can be installed vertically. Check valves can be divided into two types according to the installation direction. One is a parallel check valve, and the other is a vertical check valve.

Parallel check valves are installed on pipes parallel to the ground. It is recommended not to install the range hood check valve vertically, so that there will be oil leakage, and if there is more oil inside, there will be oil leakage.

Kiss; Hello, happy to answer your <>

It is necessary to install a check valve and a check valve in the pro-independent flue, which refers to a kind of valve that the opening and closing parts are circular and rely on the self-opening weight of the combustion body and the pressure of the medium to block the backflow of the medium. It is an automatic valve, also known as check valve, check valve, return valve or isolation valve. The disc movement mode is divided into lifting type and swing type.

The lift check valve is similar in structure to the globe valve, with only the stem that drives the disc missing. The medium flows in from the inlet end (lower side) and exits from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the disc weight and its flow resistance.

Conversely, the valve is closed when the medium flows backwards. The swing check valve has a disc that is tilted and rotates around the shaft and works similarly to a lift-and-drop check valve. Check valves are often used as foot valves for pumping devices to stop the backflow of water.

The check valve is used in combination with the globe valve to play the role of safety isolation. The disadvantage is that the resistance is high, and the sealing is poor when closing, I hope mine can help you <>

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How to install the flue check valve above or below the ceiling? Kiss; Hello, it's a pleasure to answer <> for your friend

How to install the pro-flue check valve in the ceiling under the ceiling, there are two stoppers on the range hood, which is the check valve, but this effect is very poor. As long as the main and auxiliary smoke lifting channels are not destroyed, there are two baffles on the range hood, so that the phenomenon of backfilling oil smoke will not exist, but once the main and auxiliary flue is destroyed, the scene of backfilling oil smoke will be very serious, at this time, you can only choose to install a smoke-proof treasure between the public flue and the smoke extraction pipe of the range hood, also known as the check valve, to prevent the one-way valve of oil from answering the smoke backflow. The specific installation position is to install it at the opening of the public flue, cover the check valve at the opening of the public flue, and then seal it and then connect the smoke pipe of the smoke machine.

Hope mine can help you <>

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Decoration Da Cui explained the knowledge of kitchen flue check valve, hoping to help you in decoration.

1. When the kitchen has not yet been suspended, the check valve can be installed directly at the flue mouth.

2. The kitchen has a suspended ceiling and does not want to dismantle the lift, so it can be installed on the range hood.

3. Remove the smoke pipe of the range hood, put your hand into the fixed base of the flue mouth, and when the check valve is buckled, the fan blades are opened towards the inside of the flue seal.

4. Use sealing glue to ensure that the oil smoke will not slip into the kitchen from the gap in the installation.

5. Stick the flue pipe on the check valve with tape, and use your hands to detect whether there is air leakage when you eat, and fill the glass at the air leakage.

Notes:

1. Seal the flue in the room and the check valve, and please pay attention to the use of heat-resistant aluminum foil tape when sealing. Scotch tape is not recommended here, as it has a major safety hazard and cannot withstand high temperatures.

2. After installing the check valve, it should be cleaned regularly, otherwise the check valve will be turned over and lose its effect, and the flue check valve will be replaced once in about two years.

The NF series check valves used in cold storage refrigeration units are available in a variety of specifications, and their installation methods are as follows:

1) The check valve below NF100 is a barrel structure, and the flow direction arrow is marked on the valve, which can be installed in the direction of the arrow, but it should be noted that the flow direction should not be reversed.

2) The check valve above NF100 (NF125, NF150) is a horizontal structure, which is closed by the self-weight of the valve core. Therefore, this kind of check valve must be installed by hanging wire to guarantee horizontal integrity.

3) There are two specifications of spring elasticity of NF series check valves. When used for liquids and high-pressure gases, check valves with strong spring elasticity should be installed; When used for low-pressure return air, a check valve with weak spring elasticity should be installed.

4) The welding requirements of the check valve are the same as those of the solenoid valve.

1. Enlarge the original smoke exhaust hole by a small part, and the check valve can be easily put in. If there is no flue hole, a 170mm*170mm hole can be opened.

2. Place the bridge on the inside of the flue, tighten the bridge with screws, and fix the base of the check valve at the flue mouth.

3. Align the valve body and the base firmly, and fasten the base with the bayonet around it.

4. After installation, check whether the wind shield can be easily opened, and then connect the exhaust pipe.

Magnetic seal flue check valve is the most reliable flue check valve.

1. Derived from aviation technology, it adopts magnetic sealing, which is not afraid of negative pressure and static pressure of the flue, and eliminates the phenomenon that the ordinary flue check valve is sometimes good and sometimes bad.

2. Each product has undergone a strict watertight test when it leaves the factory. Please note that our watertight test is done with the natural closure of the check valve plate, and many check valves are made by adding external force against the valve cover, which cannot simulate the natural state of flue check valve use.

3. The sealing mouth is designed with a knife edge, which is non-adhesive after long-term use.

4. Real national patents with structural and functional progress.

5. The sealing diaphragm can work normally in the range of minus 40 degrees and minus 250 degrees.

6. Stainless steel bearings will never rust.

7. Because of the magnetic seal, the installation deviation has little impact on the sealing.