The sewer system is a rather complex structure, so accidents associated with the failure of its operation can be harmful to humans and the environment. In order to prevent such situations, a sewer valve was developed. To date, two of its varieties are known - reverse and ventilation.
Main varieties: check valve
Water follows the path of least resistance. If there is a blockage in the sewer, this will entail the likelihood of a turn in the direction of the flow of sewage. Liquid can rise up and flow out of plumbing fixtures, which causes flooding of neighbors. Valves are used to prevent such situations. They exclude the flow of fluid back and the penetration of rodents.
The mentioned device works according to the same scheme. It consists of:
- body;
- lever;
- diaphragm valve;
- removable cover.
The diaphragm valve is responsible forreverse flow prevention. A removable cover is necessary to clean the device when clogged. This part allows you to forcibly close the membrane. The lever allows impurities to enter the system in the direction indicated by the arrow.
Benefits of using a valve
The valve is not a mandatory element of the sewer system. But its installation allows you to enjoy the benefits. If the consumer does not have the opportunity to bring the fan pipe through the roof, then the valve will be an excellent solution. With it, you can reduce the cost of installing a sewer system.
Even if there is everything for a modern sewerage device, you can make the task easier and eliminate the need to take the riser outside. The absence of a fan pipe allows you to avoid unpleasant situations such as a roof leak. This will prevent the penetration of cold air through the pipe and freezing of communications. Aerators eliminate the chimney effect and reduce the likelihood of fire spreading through sewer pipes in the event of a fire hazard.
Description and cost of check valve for 110 mm
The 110mm PVC Sewer Valve is a shutoff valve used in outdoor and indoor systems. The device is a single-chamber mechanism with a locking damper. Under the pressure of backwater in the sewer network, the damper closes, and if necessary, it is rigidly fixed with a manual shutter.
Sewer valve 110 mm brandTP-85.100 includes:
- manual shutter;
- bell entry;
- flap;
- mounting hatch;
- smooth exit under the funnels.
The latter can be made from PVC or polypropylene. The scope of such a device is quite wide. The devices are used not only in sewerage systems, but also for transportation:
- compressed air;
- water and steam;
- gas;
- wastewater;
- viscous media.
Such valves are widely used in water supply and heating systems, steam and other technological systems, as well as energy.
Description of check valve 50mm
Such fittings cost 1,150 rubles. It is made of PVC and has a low weight, which is very important when installing sewer pipes. This makes transportation easier and cheaper.
50mm sewer check valve is durable. It can be used for about 40 years. This is due to the fact that PVC products do not perceive the effects of ultraviolet and moisture, various aggressive environments and temperature changes. The material is characterized by the absence of overgrowing of sections, as well as the occurrence of corrosion deposits.
All parts are assembled by hand, no gas or electric welding is used in the process. The non-return sewer valve is connected to the elements according to the principle of the designer. This makes it possible to carry out work without preparation.
Additionally about50 mm valve
Such products may be based on different materials. Distilled media influence this. This is about the hull. Often cast iron or stainless steel is used for it. This allows you to operate the device in normal environments, as well as explosive and aggressive ones.
The 50mm sewer valve can be installed in a horizontal or vertical position. The pipeline itself will withstand high temperature fluctuations. The most impressive advantage of using such devices is the ability to successfully fulfill their mission in normal mode and in emergency situations.
50mm wafer type sewer check valves have compact dimensions and weight, which makes them the most preferred for installation and operation. They are resistant to temperature changes and sealed, and can also be operated under different pressure conditions. If we compare such devices with standard models, then the first ones do not have flanges, due to this their weight decreases, sometimes up to 5 kg.
Classification by material and internal structure
Sewer valves can also be divided by material, they can be:
- stainless steel;
- bronze;
- brass;
- plastic;
- cast iron.
The device can also be divided into subtypes taking into account the internal structure. She happens:
- wafer type;
- ball;
- swivel;
- lifting.
Description of wafer valves
These valves are small in size and weight. There are no flanges in the design that connect the pipeline and the valve. When problems arise in the operation of the device, they entail the need to replace the device itself and some part of the system. Wafer type valves can be:
- bivalve;
- spring;
- disc.
The first ones work due to the presence of a membrane of two valves. Disc have a spring in the design.
Varieties of rotary valves
Sewer vacuum valves can be rotary. They are also called petal, and a spool acting with a lever acts as a membrane in them. Rotary products can be classified into simple and unstressed.
The former are used in systems with low fluid flow and low pressure. When the spool returns to its place, a water hammer occurs, which disables the device. Hammerless devices allow the spools to return to their original position smoothly. This happens after water is passed.
Description of ball and lift valves
Sewage vacuum ball valve is generally used on small diameter pipes. The membrane is a metal ball, while the lever is a spring. This valve is the most popular and reliable among the check valves. For replacement and service in case of malfunction, the valve is disassembled, andit is fastened with two bolts. A reliable and simple device is a ball device, so experts advise using it.
The sewer riser lift valve has a lift device that acts as a membrane. The main advantage of such a product is the possibility of repair without disassembling the network. There is also a drawback, it is expressed in susceptibility to pollution. Lifting units can be classified according to the method of fixing to pipes. They can have a threaded connection, and are fastened with connecting flanges or welded to the sewer system. There is another variety - a valve that is clamped between sewer pipes. Such devices are called wafer type.
Installation features
The valve on the sewer pipe is installed in a vertical or horizontal position. This is due to the characteristics of the devices used. The lifting device is mounted on a horizontal section. But if the sewer is made of PVC, then the valve is installed on separate equipment, for example, a sink or toilet.
Before installation, you must select the device. In this case, you need to be based on the parameters of the sewer system, or rather, the volume of sewage. The place of installation is also taken into account, which can be the entire system or a separate section.
Installation consists of several steps. At the first, you need to choose a place and mount the device in front of a common sewer riser. The site must be easily accessible for maintenance. If the installation will be carried out in an existingsewerage, then in the selected place a small section is cut out of the system, the dimensions of which correspond to the dimensions of the device. If you have to arrange a sewer network, then the equipment is installed in the right place.
Fastening is carried out to sewer pipes. At the final stage, the device is checked for tightness. Looking at the valve, you will be able to see arrows that indicate the direction of flow. When installing the device, it is important to position it correctly in relation to the sewerage system.
Air valve description
During the operation of the sewage system, not only blockages can occur, but also strong noises. All this interferes with normal living conditions. If you do not install an air valve, then the system may let in odors. The mentioned device works according to a certain principle. Any sewer in a building over two floors must be ventilated. Fan risers are usually used for this, but a vacuum sewer valve or aerator can also be used.
When water is drained from a shower cabin or a toilet bowl, excess air rarefaction occurs in the pipeline. This is what causes extraneous noise. At this time, the aeration valve in the sewage system begins its work. It is designed to equalize atmospheric pressure and pressure in the pipe. At the same time, the required amount of air is launched into the system.
When the pressure in the riser is equal to or greater than atmospheric pressure, the valve is in the closed state. Sewer gases do not enter the room. When a vacuum is created in the riser, the valveopens and air enters the riser. When the pressure equalizes, the device closes. This will happen if the pressure in the riser falls below 5 mm of water column.
Vent valve device
Vacuum valves are usually made of polyethylene, which explains their ease of installation and low cost. Usually devices provide:
- body;
- embedded side opening;
- stock;
- rubber pad.
The side hole is needed for ventilation, and the gasket ensures the smooth operation of the stem. It also restricts movement. The stem responds to the occurrence of a pressure difference. A cover is used to protect the valve from contamination.
Varieties of air valves
By visiting the store, you can purchase an air valve in three varieties:
- automatic;
- anti-vacuum;
- combined.
The first is installed in private homes or on separate units. This is due to the low throughput. The automatic air sewer valve is designed to release trapped air from the system. Anti-vacuum works in systems with a large number of sewer pipes. It can function for air inlet and outlet. The combined instrument combines the best qualities of the types listed.
Description of vacuum valves from the manufacturer King Lai
If you want to purchase a 110mm vacuum sewer valve, you can pay attention to the King Lai model from Taiwan. It is for resourcework up to 3 million cycles. The housing is made of 304 stainless steel. The maximum ambient temperature during operation can be 60 °C. The temperature of the medium is 100 °C. The opening time is equivalent to 100ms and the closing time is 200ms.
The minimum ambient temperature for use is 0 °C. Before purchasing a 110 mm vacuum sewer valve, you must also consider the operating pressure range. For this model it is 1 x 10-8 mbar - 5 bar.
Vent valve installation
An aeration valve can be equated to a branch or a tee. Installation is carried out according to the same principle as in the case of a fitting. First you need to choose a location for installation. The device can be used for aeration of a single node or ventilation of a sewer system. The first one is about the toilet. In this case, the valve is located 30 cm from the gravity pipe, while from the siphon - 20 cm.
If the sewer valve is planned to be installed in the attic or in a specially designated room, then here we will talk about ventilation of the sewer system as a whole. The device is fixed to the pipe using a fitting or thread. It is important to make sure that all joints of equipment with pipes are tight.
For correct operation, care must be taken that the air temperature does not fall below 0 °C. Homeowners independently decide on the need to install sewer valves. But experts recommend installing devices in country houses and on the first floors of modernhigh-rise buildings.
Choose size
Air valves can be divided into several types. They are classified according to size. This factor is important, because depending on the location of the device, you should select the appropriate size.
The 110 mm sewer check valve is more commonly used for centralized riser. But for connection with plumbing fixtures, a 50 mm unit is suitable.
In conclusion
The air valve is also called an aerator. It is designed to maintain pressure in the sewage system and remove unpleasant odors from it. Many homeowners use a fan outlet for this, but with pressure drops, this does not solve the problem. Because of this, the operation of the entire drainage system is sometimes disrupted. An air valve is a great example of a reverse diaphragm device. The appliance has a flexible baffle that prevents odors from entering the outdoor environment or room.
Membrane devices are made of PVC. Usually they are located at the inlet of the fan pipe, connected as ventilation. When pressure drops, the membranes change position. Due to this, gases do not pass through the valve. Such an aerator will only work if there is oxygen in the pipe.
