Steel valves. Steel valves. Features of steel valves

We suggest you to purchase steel valves in the company. Steel valves on favorable terms, with delivery straight from a warehouse in Moscow, our specialists constantly monitor current innovations and time proven to the most demanded products and products of industrial, construction and engineering market and are ready to assist you in choosing the necessary model, Stamps and type of steel and any other pipeline and shock fittings!

Features I. general characteristics Steel valves.

This type of reinforcement is intended for constipation or regulation of liquid working media of pipelines on water lines with water, ferry, as well as ammonia, carbon dioxide, natural and liquefied gases and corrosive substances. Reliability and quality of steel reinforcement is guaranteed. Basically such valves, their hulls are made from of stainless steel, grade 20 or 25, or alloy steel. Also possible solutions made from carbon steel. More long term Operation in alloy steel products. Compared to cast iron, the valve, the case of which is made of steel, has a smaller weight, does not require additional elements for

The difference of steel from other materials

Steel shut-off and adjusting fittings differ significantly from the valves produced from bronze, brass or cast iron. They are produced with conditional passage of the dular exceeding the average - up to 100 mm. and therefore are used on larger highways than on ordinary residential sites, and also withstand more important Maximum temperature, up to + 425 ° C, and the pressure of the working medium to 6.3 MPa. By type of join, such valves are mainly flanged, but there are models and coupling ( internal thread), either an arm (external) compound under welding. Installation of steel valves on the pipeline is allowed in any position. In the case of options with the response flanges, it is necessary to accurately weld the input and outlet nozzles on the pipeline, thus the greatest tightness of the design is achieved and the installation process is simplified, but the displacement is resolved somewhat more difficult, as a result of which the valve itself increases.

One example of a classic steel valve with flange attachment and manual drive is the model 15C22NA, manufactured by Arzil, made for work at elevated temperature regimes and the pressure of the environment, but not recommended the installation of such valves in high static pressures due to the danger of the hydrowarder.

How to buy steel shut-off valves with us?

Our specialists are always ready to help you and advise in the selection of necessary. pipe fittings, it is enough just to leave a request on the site or contact us by phone indicated on the site aglant, except free shipping In Moscow and the Moscow region, we deliver and shipping goods to terminals transport companies in any regions and cities Russian Federation, for example, such as: Yekaterinburg, Samara, Krasnodar, Vladivostok, Chelyabinsk, Omsk, Penza, Rostov-on-Don, Perm, Republic of Crimea and others.

The main properties with which products are elements that are elements of water supply and heating networks, in particular, shut-off valves, determines the metal used in the manufacture of metal. Important properties that must have a valve material is:

Strength, because Water flow in pipes creates high pressure. In addition, with emergency situations, it can repeatedly increase, generating the need to have a large safety margin of a single product;
Minimal impact of metal corrosion. Oxidation reduces the operational properties of metals, and therefore products affected by it to a greater extent, to avoid breakdowns, it is necessary to promptly replace new;
The low cost of a separate product as a leading factor in the economic success of the work and for a separate person and for a large enterprise.

Embodiment harmonious combination Average indicators for all these qualities, the valve is a locking steel of all variations of structures. Sales of this product occupy a weighty niche, and figure out why it will help detailed analysis its properties.

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

The best and most practical in the properties of iron-based material created by people is steel. In addition to the main metal, it is also a small carbon percentage. 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 the decrease in the viscosity and elasticity of the structure of iron, but gives a lot of positive changes. Among the main distinguishing properties of steel are:

High resistance to mechanical damage. This is achieved because the steel valve has more, than in cast iron with elasticity and durability, much higher than the indicators of brass products;
The possibility of interaction with hot liquids and gases. The temperature of the working environment can reach indicators in 425 0 C without any consequences for the performance of the node;
Relative corrosion resistance prolongs the life of nodes made of steel, which means that they will be changed not so often, such as for products from cast iron.

Thus, steel possess the best quality ratio to the price of all materials used in the production of valves. This is a middle pepper of the market, which will find a place and in a large node of the industrial system of water and gas supply, as well as will be the solution of many small household problems At the level of system organization in the conditions of an apartment or a private plan house.

Construction and principle of steel valve

The design of the shut-off valve, referred to as the valve of the valve, has a long history and ample opportunity to use. As such this device It is intended to regulate the intensity of the flow of the working medium in the pipes, up to its full overlap. The effectiveness of such valves along with the extreme simplicity of the design, determines their popularity.

Composite parts of the valve steel flange slightly:

Through the body of the product made of steel, the working medium (liquid or gas) is passed, in a certain place of which, there is a bottleneck. It is it that serves to overlap the flow, with the assistance of other elements of the system;
The working body of the steel straight-flow valve is a spindle that takes a torque from the steering wheel controlled by manually or by the mechanized method (in systems with automation);
Nut - threaded holewhere the spindle is moving during the performance of its functions. Structurally part of the valve body;
The spool is located on the extreme lower tip of the spindle. It is made of elastic material, it is he who overlaps the duct;

The principle of operation of the entire system is quite simple. The spindle by means of a threaded connection, when twisting, lowers a spool, located at its lower end. During this action, the spool. The latter, in the extreme lower position, sits in a "bottleneck" of the housing, completely blocking the passage, makes it impossible to further move the working medium inside the valve.

This principle is one, but has its own characteristics in different designs Steel valve:

The usual and most common angle between the spindle direction and the flow of the working medium in the valve body is standard 90 0 C. This valve is called passing. However, with such a layout, hydraulic losses increase in the flow rate, because The design of the damper involves a complex path in the form of two turns, which overcomes liquid or gas in it. This causes increased pressure in the system, compensate for all losses, but increases the load on weak ulces, in particular the valve.

Some smaller, but significant internal resistance have corner valves. Their spindle is located directly on bending, which significantly reduces the possibilities of using it to special places in the pipeline system. In them, the working stream only performs a turn by 90 0, after which it follows it unhindered;

To reduce resistance, the inclined arrangement of the spindle and, accordingly, the flaps inside the housing are applied. Such a node is called steel straight-flow valve, which indicates a practically unhindered following fluid inside the valve. Accordingly, the coefficient of opposition to them is much lower, but at the same time they perfectly perform their functions in the regulation of the flow intensity, albeit with a slightly enlarged spindle length.

It is also worth noting that with small diameters, a sufficient effort that needs to be conveyed to the spindle is also quite small. But with an increase in the flow stream and the size of the pipes, there is a need to significantly enhance the entire structure and first of all the rotary system to ensure the smoothness of the turn and the density of planting the spool in the housing saddle.

Types of fasteners

The reliability of the system depends not only on the material that underlies the product and its constructive features, but also from the system of its attachment on the section of the pipe. The development of systems affected the variety of this factor, offering under different types Tasks, your own, economically this method:

The weld method involves hermetic consolidation of the steel valve by means of welding. With high quality mounting work A single connection of the highest class of strength is formed, but it is difficult to achieve it. Therefore, this method is input only in the absence of other possibilities to connect, together two elements of the system;
Connection method using a coupling or fitting, i.e. Threaded contact applied with small diameters of the pipeline, up to 40 mm. Thread cutting can be carried out both on the inside of the valve and on the surface. To connect to the pipe there are a lot of varying accessories and adapters designed to improve the quality of fixation. An important role in it has sealing of threads by seals from spans of flax or polymer tapes impregnated with sealant. This type of fastening cannot provide reliability at large diameters, creating a risk of breaking the thread under excess pressure. It makes it look for other means for fastening;
In such cases, the valve is justified to use the valve valve steel flange, which at the inlet and outlet has a special plate with a hole under the diameter of the pipe, round or square shape (flange). Similar overlays are attached to the cutting of the pipeline. They have specially cooked holes intended for the bolted connection of parts, through a hermetic gasket. The flanges are fixed on the pipe and the valve or by welding, or, during the resulting method of production, are placed in advance on the form 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 bolted fasteners and the power of each of them separately.

Favorable offers of steel flange valves

The acquisition of quality products according to the price is accurate for it - the purpose of each acquirer. To do right choiceBefore you buy a steel flange or other type valve, you can only competently considered a variety of offers from manufacturers and comparing the characteristics that they guarantee for their products.

You can implement such an analysis using a list of products on the website of Technology. A complete set of characteristics of each product, exposed on the relevant product pages, fully reflects their quality. You can learn from the first hands and the cost of the goods, as well as order a batch of a certain number and even pay it using a remote service.

Did not find the appropriate instance or you and you need a unique product sample - help here. The list of services provided by the Company includes the possibility of manufacturing our own production, shut-off steel valves to order according to the provided drawings. Quality guarantee perfect compatibility The project will make our cooperation in the purchase of shut-off valves very promising and long-term.

When equipped pipelines in utilities and industry today are used different kinds Shut-off valves for the manufacture of which are used different materials.

Wide distribution have steel valves that demonstrate a long service life and high reliability of work in sophisticated conditions operation. Steel shut-off valves from leading manufacturers you can buy in the company "Santekhkomplekt" in Moscow.

Features of steel valves

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

in communal services;
in energy;
in industry.

Depending on the method of connecting the pipeline, coupling and flange valves differ. In the first case applied threaded connectionand the valves themselves are used to install on pipelines relatively not big 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 flange with a bolted compound.

The design of the valve consists of a steel housing with a lid, a spindle of steel and brass, a locking element of the spool type. Characteristics of steel used for the production of valves allow them to withstand significant operating pressure and substantial temperature differences, which expands the scope of application of shut-off devices.

Steel valves in the assortment in the Santekhkomplekt online store To improve the service life and the possibility of the operation of the valve under the conditions of the aggressive medium, a galvanized anti-corrosion coating of steel elements can be used.

The key characteristic of the steel valve is the reliability of locking the flow of the fluid pumped through the pipeline. Therefore, high demands are presented to the quality of the spool, which should ensure the maximum dense adjacent of the fluoroplastic gasket to the sealing surface.

The gasket must also meet the high quality and reliability requirements, while maintaining its properties with multiple valve opening cycles. Spindle sealing is provided with a gland sealwhich should be performed from qualitative materials, eliminating the possibility of leakage.

When equipped pipelines, it is necessary to use steel shut-off valves high Qualitywhich have an operational resource at least 1,500 opening-closing cycles. In this case, the long-term operation of the device and reliable locking of the fluid flow without the formation of leaks will be ensured.

Quality valves at a bargain price

Buy high-quality steel valves in Moscow on the most favorable terms you can in the company "Santekhkomplekt".

We offer shut-off valves only from leading manufacturers who fully comply with the requirements of existing standards and use high-quality materials. This ensures longer operation of devices with reliable locking, including under severe operating conditions with the effects of aggressive media and temperature differences.

Our catalog presents valves with a compound of both flange and coupling type. There are a variety of valve sizes in stock. This allows us to satisfy the needs of any customer. Our company offers the most favorable prices and provides operational supplies of steel shut-off valves by parties of any volume.