The sewer system is a rather complicated design, therefore 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 has been developed. To date, two of its varieties are known - reverse and ventilation.
Main varieties: check valve
Water moves along the path of less resistance. If a congestion occurs in the sewer, this will entail the likelihood of a turn in the direction of the sewage flow. Liquid can rise upward and flow out of plumbing fixtures, causing flooding of neighbors. Valves are used to prevent such situations. They exclude the return of fluid back and the penetration of rodents.
Said device operates according to one scheme. It consists of:
- housing;
- lever;
- diaphragm gate valve;
- removable cover.
The diaphragm valve is responsible for preventing backflow. A removable cover is required to clean the device when clogged. This part allows you to forcefully overlap the membrane. A lever lets sewage into the system in the direction of the arrow.
Valve Benefits
The valve is not a mandatory element of the sewer system. But installing it allows you to take advantage. If the consumer does not have the opportunity to bring the fan pipe through the roof, then the valve will be a great solution. With it, you can reduce the cost of installing a sewer system.
Even if there is everything for a modern sewage system, you can ease the task and eliminate the need for the riser to be brought out. The absence of a fan pipe allows you to avoid unpleasant situations like 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 the sewer pipes in the event of a fire hazard.
Description and cost of check valve 110 mm
The 110 mm PVC sewer valve is a stop valve used in both indoor and outdoor systems. The device is a single-chamber mechanism with a locking flap. Under pressure in the sewer network, the shutter closes and, if necessary, is rigidly fixed by a manual shutter.
Sewer valve 110 mm TP-85.100 brand includes:
- manual shutter;
- bell entrance;
- damper;
- mounting hatch;
- smooth exit under fan pipes.
The latter can be made of polyvinyl chloride or polypropylene. The scope of use of such a device is wide enough. Applied devices not only in sewage 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.
50 mm check valve description
Such reinforcement costs 1,150 rubles. It is made of PVC and has a small weight, which is very important when installing sewer pipes. This facilitates transportation, making it cheaper.
The 50 mm check valve is durable. It can be operated 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 extremes. The material is characterized by the absence of section overgrowing, as well as the occurrence of corrosion deposits.
All parts are assembled by hand, in the process, gas or electric welding is not used. The back sewer valve is connected to the elements according to the principle of the designer. This makes it possible to carry out work without preparation.
More about 50 mm valve
Such products may be based on different materials. This is influenced by distilled fluids. This applies to the case. Often, cast iron or stainless steel is used for it. This allows the device to be operated in normal environments, as well as explosive and aggressive.
50 mm sewer valve can be installed in 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.
50 mm interflange check sewer valves have compact dimensions and weight, which makes them the most preferred for installation and operation. They are resistant to temperature extremes and tight, and can also be operated under different pressure conditions. If we compare such devices with standard models, the former do not have flanges, which reduces their weight, 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.
It is possible to divide into sub-types of the device taking into account the internal structure. It happens:
- interflange;
- ball;
- rotary;
- lifting.
Description of Wafer Type Valves
These valves are lightweight and small in size. The design does not have flanges 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. Interflange valves can be:
- bivalve;
- spring loaded;
- disk.
The first work due to the presence of a membrane of two wings. Disc have a spring in the design.
Varieties of Rotary Valves
Sewer vacuum valves can be rotary. They are also called petal, and as a membrane in them, a spool acts by means of a lever. Classify rotary products can be simple and unstressed.
The former are used in systems with low fluid passage and low pressure. When the spool returns to its place, a water hammer occurs , which destroys the device. Shock-free devices allow spools to return to their original position smoothly. This occurs after the passage of water.
Description of ball and lift valves
Ball sewer vacuum valve is usually used on pipes of small diameter. The membrane is a metal ball, while the lever is a spring. This valve is the most popular and reliable among check valves. For replacement and maintenance in case of malfunctions, the valve is disassembled, and it is fastened with two bolts. A reliable and simple device is a ball device, so experts advise using it.
The lifting valve for sewer risers has a lifting device that projects as a membrane. The main advantage of such a product is the ability to repair indiscriminately network. There is 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 kind - the valve, which is clamped between the sewer pipes. Such devices are called interflange devices.
Installation Features
The valve on the sewer pipe is installed in a vertical or horizontal position. This is due to the features of the devices used. The lifting device is mounted horizontally. But if the sewage system is made of PVC, then the valve is installed on separate equipment, such as a sink or toilet.
Before starting installation, you must select a device. In this case, it is necessary to rely on the parameters of the sewer system, or rather, the amount of sewage. The installation site, which can be the entire system or a separate section, is also taken into account.
Installation consists of several steps. At first you need to choose a place and mount the device in front of a common sewer riser. The site should be easily accessible for maintenance. If the installation will be carried out in an existing sewer, then in a selected place from the system a small area is cut out, 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. The device at the final stage is checked for leaks. Looking at the valve, you can see the arrows that indicate the direction of flow. When installing the device, it is important to position it correctly in relation to the sewage 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, the system may let odors out. The mentioned device works according to a certain principle. Any sewage system in a building with more than two floors must have ventilation. For this, fan risers are usually used , but a vacuum sewer valve or aerator can also be used.
When water drains from a shower cubicle or a toilet bowl, excessive rarefaction of air occurs in the pipeline. This becomes the cause of 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 right amount of air is launched into the system.
When the pressure in the riser is equal to or greater than atmospheric, the valve is in a closed state. Sewer gases do not enter the room. When a vacuum is created in the riser, the valve opens, and air enters the riser. When equalizing the pressure, the device closes. This will happen if the pressure in the riser drops below 5 mm of water.
Vent valve device
Vacuum valves are usually made of polyethylene, which explains their easy installation and low cost. Typically, devices include:
- housing;
- integrated side hole;
- stock;
- rubber gaskets.
The side opening is necessary for ventilation, and the gasket ensures smooth operation of the stem. It also restricts movement. The stem responds to pressure differences. A cover is used to protect the valve from contamination.
Varieties of air valves
Having visited the store, you can purchase an air valve in three varieties:
- auto;
- anti-vacuum;
- combined.
The first is installed in private homes or on individual units. This is due to the low bandwidth. The automatic air drain valve is designed to release accumulated 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 device combines the best qualities of the listed types.
Description of vacuum valves from the manufacturer King Lai
If you want to purchase a 110 mm vacuum sewer valve, you can pay attention to the King Lai model from Taiwan. It is designed for a service life of up to 3 million cycles. The case is made of stainless steel grade 304. The maximum ambient temperature during operation can be 60 ° C. The medium temperature is 100 ° C. Opening time is equivalent to 100 ms and closing time is 200 ms.
The minimum ambient temperature during use is 0 ° C. Before purchasing a 110 mm vacuum drain valve, you must also consider the operating pressure range. For this model, it is 1 x 10-8 mbar - 5 bar.
Vent valve installation
The aeration valve can be equated to a branch or tee. Installation is carried out according to the same principle as in the case of the fitting. First you need to choose a place to install. The device can be used for aeration of a separate unit or ventilation of a sewer system. In the first case, it is a toilet. In this case, the valve is located from a gravity pipe of 30 cm, while from a siphon - 20 cm.
If the sewer valve is planned to be installed in the attic or in a specially designated room, then 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 ensure that all joints of the equipment with the pipes are tight.
For correct operation, care must be taken to ensure that the air temperature does not fall below 0 ° C. Homeowners decide on their own the need to install sewer valves. But experts recommend installing devices in country houses and on the first floors of modern high-rise buildings.
Size selection
Air valves can be divided into several types. They are classified in accordance with dimensional indicators. This factor is important, because depending on the location of the device, you should select the appropriate size.
A 110 mm sewer check valve is more commonly used for a central riser. But for connecting to plumbing fixtures, a 50 mm unit is suitable.
Finally
The air valve is also called an aerator. It is designed to maintain pressure in the sewage system and to 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 device has a flexible partition, which prevents the penetration of odors into the external environment or room.
Membrane devices are made of PVC. Usually they are located at the entrance of the fan pipe, which is connected as ventilation. With pressure differences, the membranes change position. Due to this, gases do not pass through the valve. Such an aerator will work only if oxygen is available in the pipe.