The valves are steel. Steel valves High-quality valves at a competitive price

We offer you to purchase steel valves from the Aglant company on favorable terms, with delivery directly from a warehouse in Moscow. Our specialists constantly monitor current new products and time-tested, most popular products and products of the industrial, construction and engineering markets and are ready to assist you in choosing required model, brand and type of steel and any other pipeline and shut-off valves!

Features and General characteristics steel valves.

This type of valve is intended for shutting off or regulating liquid working media of pipelines on process lines with water, steam, as well as ammonia, carbon dioxide, natural and liquefied gases and corrosive substances. The reliability and quality of using steel reinforcement is guaranteed. Basically, such valves, their bodies are made from of stainless steel, grade 20 or 25, or alloy steel. Solutions made from carbon steel are also possible. Longer service life for products made of alloy steel. Compared to cast iron, fittings whose body is made of steel have less weight and do not require additional elements at

The difference between steel and other materials

Steel shut-off and control valves differ markedly from valves made of bronze, brass or cast iron. They are available with conditional passage DN exceeding average - up to 100 mm. and therefore are used on larger highways than on ordinary residential buildings, and also withstand higher value maximum temperature, up to + 425 °C, and pressure working environment up to 6.3 MPa. According to the type of connection, such valves are mainly produced as flanged ones, however, there are models with a coupling (internal thread) or pin (external) welding connection. Installation of steel valves on the pipeline is allowed in any position. In the case of options with mating flanges, it is necessary to precisely weld the inlet and outlet pipes on the pipeline, thus achieving the greatest tightness of the structure and simplifying the installation process, but dismantling and subsequent repairs are somewhat more difficult, as a result of which the cost of the valve itself increases.

One example of a classic steel valve with a flange connection and a manual drive is the 15S22NZh model, produced by the Arzil company, designed to operate at elevated temperatures. temperature conditions and medium pressure, however, installation of such valves in networks with high static pressure is not recommended due to the danger of water hammer.

How to purchase steel shut-off valves from us?

Our specialists are always ready to help you and advise you in selecting the necessary pipeline fittings, you just need to leave a request on the website or contact us by phone indicated on the Aglant website, except free shipping in Moscow and the Moscow region we deliver and dispatch cargo to the terminals of transport companies in any region and city Russian Federation, for example, such as: Ekaterinburg, Samara, Krasnodar, Vladivostok, Chelyabinsk, Omsk, Penza, Rostov-on-Don, Perm, Republic of Crimea and others.

When assembling pipelines in public utilities and industries are used today different kinds shut-off valves, for the manufacture of which different materials are used.

Steel valves are widely used, which demonstrate long service life and high reliability in difficult operating conditions. You can buy steel shut-off valves from leading manufacturers from the Santekhkomplekt company in Moscow.

Features of steel valves

Steel valves, or valves, are one of the most common types of shut-off devices used on pipelines:

• in public utilities;
• in energy;
• in industry.

Depending on the method of connecting the pipeline, a distinction is made between coupling and flange valves. In the first case, a threaded connection is used, and the valves themselves are used for installation on pipelines in relatively small quantities. large diameter.

Flange valves are installed on large-diameter pipelines with significant pressure of the pumped medium. Their connection to the pipeline is carried out using a bolted flange.

The valve design consists of a steel body with a cover, a steel and brass spindle, and a spool-type locking element. The characteristics of the steel used to manufacture the valves allow them to withstand significant operating pressure And significant differences temperatures, which expands the scope of application of locking devices.

Steel valves in an assortment in the Santekhkomplekt online store. To increase the service life and the ability to operate the valve under conditions of exposure to an aggressive environment, galvanized anti-corrosion coating of steel elements can be used.

The key characteristic of a steel valve is the reliability of blocking the flow of liquid pumped through the pipeline. Therefore, high demands are placed on the quality of the spool, which must ensure the tightest possible fit of the fluoroplastic gasket to the sealing surface.

The gasket must also meet high requirements quality and reliability, maintaining its properties during repeated cycles of opening and closing the valve. The spindle is sealed using an oil seal, which must be executed from quality materials, eliminating the possibility of leakage.

When assembling pipelines, it is necessary to use high-quality steel shut-off valves that have an operational life of at least 1,500 opening-closing cycles. In this case it will be ensured long work devices and reliable blocking of liquid flow without leakage.

Quality valves at competitive prices

You can buy high-quality steel valves in Moscow on the most favorable terms from the Santekhkomplekt company.

We offer shut-off valves only from leading manufacturers who fully comply with the requirements of current standards and use high-quality materials. This ensures long-term operation of devices with reliable locking, including under difficult operating conditions with exposure to aggressive environments and temperature changes.

Our catalog contains valves with both flange and coupling type connections. A wide variety of valve sizes are available. This allows us to satisfy the needs of any customer. Our company offers the best prices and ensures prompt supplies of steel shut-off valves in batches of any size.

The main properties possessed by products that are elements of water supply and heating networks, in particular shut-off valves, determines the metal used in production. Important properties The required valve material is:

• Strength, because water flow in pipes creates high pressure. In addition, when emergency situations it can increase many times over, creating the need to have a large margin of safety for a single product;
• The impact of metal corrosion is minimal. Oxidation reduces operational properties metals, which means that products affected by it to a greater extent must be promptly replaced with new ones in order to avoid breakdowns;
• The low cost of an individual product is a leading factor in the economic success of work for both an individual and a large enterprise.

Incarnation harmonious combination The steel shut-off valve of all design variations has average indicators for all these qualities. Sales of this product occupy a significant niche, and a detailed analysis of its properties will help to understand why this is so.

Properties of steel in the production of direct-flow steel valves

The best and most practical iron-based material created by people is steel. In addition to the base metal, it also contains a small percentage of carbon. To be called steel, its content in the metal alloy cannot exceed 2.14% of the total mass. With such a low amount, the carbon mass does not have a critical effect on reducing the viscosity and elasticity of the iron structure, but it gives many positive changes. Among the main distinctive properties of steel are:

• High resistance to mechanical damage. This is achieved because a steel valve has greater elasticity and strength than cast iron, far exceeding those of brass products;
• Ability to interact with hot liquids and gases. Temperatures of the working environment can reach 425 0 C without any consequences for the performance of the unit;
• Relative resistance to corrosion extends the life of components made of steel, which means that replacing them will not be necessary as often as, for example, for products made of cast iron.

Thus, steels have the best quality-to-price ratio of all materials used in valve production. This is a mid-market product that will find a place in a large hub industrial system water and gas supply, and will also be a solution to many minor household problems at the level of organizing systems in an apartment or private house.

Design and operating principle of steel valve

Design shut-off valve, also called by the capacious word valve, has a long history and ample opportunities by use. As such, this device is designed to regulate the intensity of the flow of the working medium in the pipes, up to its complete blocking. The efficiency of such valves, along with the extreme simplicity of their design, determines their popularity.

There are few components of a steel flanged valve:

• Through the body of the product, made of steel, the working medium (liquid or gas) is passed through, in a certain place of which there is a bottleneck. It is this that serves to block the flow, with the assistance of other elements of the system;
• The working body of a steel direct-flow valve is a spindle, which receives torque from a handwheel controlled manually or mechanized way(in systems with automation);
• A nut is a threaded hole along which the spindle moves while performing its functions. Structurally, it is part of the valve body;
• The spool is located at the extreme lower end of the spindle. It is made of elastic material, it is this material that blocks the duct;

The operating principle of the entire system is quite simple. Spindle via threaded connection when tightened, the spool located at its lower end lowers. During this action the spool. The latter, in the lowest position, sits in the “bottleneck” of the housing, completely blocking the passage, making it impossible for further movement of the working medium inside the valve.

This principle is uniform, but has its own characteristics various designs steel valve:

The usual and most common angle between the direction of the spindle and the flow of the working fluid in the valve body is the standard 90 0 C. Such a valve is called a through valve. However, with this arrangement there is an increase hydraulic losses in flow speed, because the design of the damper involves a complex path in the form of two turns, which liquid or gas travels through it. This forces the pressure in the system to increase, compensating for all losses, but increases the load on weak parts, in particular the valve.

Angle valves have slightly lower, but significant internal resistance. Their spindle is located directly on the bend, which significantly reduces the possibility of its use to special places in the pipeline system. In them, the working flow makes a turn of 90 0 only once, after which it continues unhindered;

To reduce resistance, an inclined arrangement of the spindle and, accordingly, the damper inside the housing are used. Such a unit is called a straight-through steel valve, which indicates an almost unimpeded flow of liquid inside the valve. Accordingly, the resistance coefficient in them is much lower, but at the same time they perfectly perform their functions in regulating the flow intensity, albeit with a slightly increased spindle stroke length.

It is also worth noting that with small diameters, the sufficient force that needs to be transferred to the spindle is also quite small. But with an increase in throughput and pipe sizes, there is a need to significantly strengthen the entire structure and, above all, the rotary system, in order to ensure smooth rotation and tight fit of the spool into the housing seat.

Types of fastenings

The reliability of the system depends not only on the material that underlies the product and its design features, but also from the system of its fastening on the pipe section. The development of systems has influenced the diversity of this factor, offering Various types tasks, your own, economically justified this method:

• The welding method involves hermetically sealing a steel valve using welding work. At high quality installation work a single connection of the highest strength class is formed, but it is not easy to achieve. Therefore, this method is used only in the absence of other opportunities to connect together two elements of the system;
• Connection method using a coupling or fitting, i.e. threaded contact, used for small pipeline diameters, up to 40 mm. Thread cutting can be done either with inside valve and on the surface. For connecting to a pipe, there are a lot of different fittings and adapters designed to improve the quality of fixation. An important role here is the sealing of threads with sealants made of strands of flax or polymer tape impregnated with sealant. This type of fastening cannot provide reliability for large diameters, creating the risk of thread breakage under overpressure. This forces us to look for other means of fastening;
• In such cases, it is justified to use a steel flanged shut-off valve, which at the inlet and outlet has a special plate with a hole for the diameter of the pipe, round or square shape(flange). Similar linings are attached to the pipeline section. They have specially prepared holes designed for bolting parts together through a sealed gasket. Flanges are fixed to the pipe and valve either by welding, or, with the cast production method, they are pre-placed on the mold and are present on the product initially. This type of fastening is considered the most reliable for systems with high internal pressure. Strength depends on the number of bolts and the power of each of them individually.

Advantageous offers for steel flanged valves

Acquisition quality products at a price commensurate with it - the goal of every purchaser. Do right choice Before you buy a steel flanged valve or another type, you can only competently consider the various offers from manufacturers and compare the characteristics that they guarantee for their products.

You can carry out such an analysis using the list of products on the TekhArmatura website. A full set of characteristics of each product, displayed on the corresponding product pages, fully reflects their qualities. You can find out first-hand the cost of the goods, as well as order a batch of a certain quantity and even pay for it using a remote service.

If you haven’t found a copy that matches your characteristics, or you just need a unique sample of the product, we can help you here too. The list of services provided by the company includes the possibility of manufacturing using our own own production facilities, shut-off steel valves to order according to the provided drawings. Quality guarantee coupled with perfect compatibility with the project will make our cooperation in the purchase of shut-off valves very promising and long-term.