This type of fitting for pipelines is a device that is designed to regulate and prevent changes in the direction of hot and cold water or steam. In simple terms, due to its presence, water (or steam) moves only in one direction, without changing direction. The equipment reduces the risk of technical problems, such as pressure drops.
Working principle
The non-return valve works automatically based on a system of sensors. It opens and closes independently, depending on the flow in the pipeline. Such fittings are installed in large buildings where the pressure can be very high.
The valve, located in the saddle, is the main structural element. When the flow rate is reduced to a minimum, it closes, which prevents the movement of water in the opposite direction. When the speed is normal, it opens and work continues in this position.
The non-return valve for pipeline systems is made of stainless or carbon steel. Such material is considered durable, strong and resistant to different temperature ranges. The design has the following structure:
- cylindrical body;
- spring with locking element;
- 2 branch pipes, tightened with studs;
- O-ring.
Compared to other types of fittings, check valves for pipeline systems are reliable and waterproof. They can be operated at temperatures up to +80°C and nominal pressures up to 10/16 atm. However, they are more sensitive to polluted environments, so they can seize under difficult working conditions.
The service life is more than ten years, at least such devices are presented by FOBOS reinforcement company.
Scope
Valves are often used in horizontal pipelines for hot and cold water supply systems to prevent backflow and provide the necessary direction of flow. They can also be used when transporting technical fluids or during the construction of irrigation canals. Due to the simple design and clear principle of operation, their efficiency is very high. Valves eliminate the risk of water hammer and increase the level of tightness.
Key features and benefits
Devices are selected according to operating conditions. Their main parameters:
- material - steel, cast iron, bronze or Latin;
- diameter - 15-800 mm;
- mounting type - right-hand, coupling, flanged, wafer type.
The valves have a number of advantages:
- minimal travel of the locking element;
- small dimensions;
- wide range of applications;
- good throughput;
- long service life.
The right choice of equipment and its professional installation will allow reliably protect the pipeline from water hammer, damage, corrosion and ensure long-term stable operation of the system. It is very important to choose not only high-quality products and a responsible supplier of products, but also a reliable partner for the installation of this type of valves.
