Control valves, electric actuators and accessories. Steam pressure regulators downstream Solenoid valve for steam SMART SL5575

Decor elements 15.06.2019

Decor elements

The steam control valve is designed to regulate the parameters and maintain a given flow rate of the working medium in a certain section of the pipeline system. With the help of a steam valve on a particular section of the pipeline, it is possible to change the steam flow rate, as well as its pressure. The steam valve performs its regulating function by changing the diameter of the passage section through which the flow of the working medium passes. Modern steam valves are controlled by electric and pneumatic actuators, as well as thermostats and differential pressure controllers.

Kinds

Depending on the area where the steam valve will be installed, the following types of such devices are distinguished:

Angle valves are installed on sections of the pipeline that bend at an angle of 90 degrees;
Passage steam valves are mounted in areas with a direct flow of the working medium.

There are also types steam valves as two-way (without changing the direction of steam) and three-way (mixing or separating steam flows). Three-way steam valves are in demand in heating plants and heating points.

Characteristics

Steam control valves consist of two functional parts - the valve itself, which acts on steam, and the actuator (actuator). For the manufacture of the body of steam valves is used stainless steel, alloy steel or cast iron. Most models are maintainable and are characterized by low noise during operation. The simple and reliable design of steam valves, the ability to regulate the working environment in automatic mode makes them an optimal element for installation in automatic control and process control systems.

Peculiarities

Steam control valves differ in maximum operating pressure and maximum temperature working environment, which must be taken into account when choosing a suitable model. Also, valve models differ in the pressure regulation range, in addition, some devices have a practical multi-stage regulation function.

Application

Steam valves are suitable for installation on pipelines of any purpose - in municipal systems of residential and administrative buildings, in factories, in pasteurization systems, in boiler houses, boiler houses and heating points. Reinforcement connection of this type to the pipeline different ways– using flanges or couplings, some models can be welded.

Steam valves regulators are designed for use in heating, hot water, heat supply, ventilation and air conditioning systems in order to regulate the parameters of the working medium (pressure, temperature, flow, etc.), which can be water, air, steam and other liquid and gaseous media, neutral to valve materials in contact with the medium. The valve is controlled by an actuator. Our catalog includes products from Danfoss, Broen, Giacomini, ARMA-PROM LLC.

The Russian manufacturer offers steam control valves with single and double seats, equipped with an electric drive, gas control valves, vf3 control valves, belimo. Rotary control valves can be used both for joint operation with regulators and for manual operation. remote control.

Valves for steam, gas regulating rotary with electric drive

In the assortment of the company "Santekhkoplekt" - electric control valve Danfoss, represented by two- and three-way models (reducer electric actuator is purchased separately), and one-two-seat shut-off and control valves with Broen electric actuator. Valves are used at central and individual heating points, systems supply ventilation greenhouses, in water supply systems and other areas of the economy as a locking device or for automation of regulation technological processes. The calculation of the control valve for steam is carried out in accordance with regulatory documents. The valves are used with electric actuators, thermostats, pneumatic actuators, differential pressure regulators, which you can purchase separately. Here you will find accessories for installation and ensuring the smooth operation of valves.

Gas pressure regulators

In the online store of the company "Santekhkomplekt" you can purchase gas pressure regulators, which are necessary to control the hydraulic mode of operation of the gas distribution system.

Compression fittings

Compression fittings are used to connect polyethylene pipes in water supply and irrigation systems. They allow you to quickly and reliably mount pipes without the use of welding equipment. Compression fittings are most often used for the installation of small diameter pipes.

Compression fittings have a lot of advantages: they are easy to install, provide a reliable and durable connection, resistant to corrosion and tight.

Fittings consist of:

corps;
clamping ring;
sealing ring;
bushings;
nut covers.

The Santekhkomplekt catalog contains a wide range of compression fittings for the installation of HDPE pipes, in particular bends, plugs, tees, flanges, couplings, etc.

Crimp fittings

Compression fittings are designed for installation of water supply systems, mainly for joining metal, metal-plastic or copper pipes. The presence of a crimp ring allows installation without the use of welding or threading tools. At the same time, the products are highly resistant to pressure and vibrations. Fittings can be made from various materials.

The simple design of the fitting ensures ease of connection and reliability in operation. The most popular fittings are made from an alloy of brass and copper, treated with nickel for greater strength and durability. If you need a coupling fitting, plugs, tees and other crimp type fittings, then in the Santekhkomplekt catalog you will select the necessary parts. We have a full range of accessories for the installation of pipeline systems.

Push-in fittings

Push-in fittings are designed to connect metal and plastic pipes. Main design feature- the presence of a sealing ring, which is installed on top of the pipe. A locknut is screwed onto the thread of the fitting, which ensures the tightness and tightness of the connection.

In the Santekhkomplekt catalog you will find a wide range of accessories for the installation of pipelines for various purposes. We offer products from leading manufacturers in the industry.

Communication modules

AT modern dwellings high-tech systems of water supply, heating and sewerage are used. There are special control devices that are connected to the life support systems of the building, which are able to regulate the operation of these systems, bringing them into line with the preset parameters.

In such a system, an indispensable element becomes communication module, which makes it possible to communicate with an external device with the electronic controllers of the system. By connecting to the control devices via the RS232 interface, the communication module provides access to information about the operation of the system or its individual elements.

Fields of application of communication modules

The device, which can be purchased at a bargain price in our store, can be used in the heating control structure to regulate and optimize the operation of heating systems in accordance with the data of external weather sensors and internal temperature sensors.

The device is a necessary element when connecting remote control units or room displays to control a multi-circuit heating system.

It serves to obtain information from internal and external water and air temperature sensors and direct or indirect temperature control in heating system, control of operation of coppers or pumps.

The communication module can also be used to control a shut-off pipe fittings in various industries.

Find wide application in various industries. Whether the valve is used as a simple temperature controller or as part of complex system automatic control technological process (APCS), its selection is an important technical task.

Figure 1. Control valves

Choosing the right control valve will not only achieve the best control accuracy, but also avoid problems such as high noise levels or erosive wear.

So, in some cases, the throughput of the valve can fully correspond to the problem being solved, however, in order to avoid high level noise, a valve with a larger nominal diameter must be selected.

The need to link together often mutually exclusive requirements makes the selection of a control valve not such an easy task. Selecting a valve with either an undercapacity or an overcapacity can lead to serious problems.

Oversized valve selection

Selecting a valve with too large capacity will result in it not being able to provide the required control accuracy. This is because the valve stem travel required for regulation will be small compared to the full valve stem travel.

Such errors can lead to instability of the control system and premature failure of both the valve and its actuator.

These errors can be avoided if the control valve is selected so that the pressure drop is completely open valve was the maximum possible for this task at the maximum steam flow rate. In practice, this means that the valve is selected for a critical pressure drop.

Unfortunately, the task is complicated by the fact that it is not always possible to determine the maximum allowable pressure drop across the control valve. An example of such cases is the choice of a control valve to maintain a given temperature of the heated medium in the heat exchanger.

Choice of valve underestimated DN

Obviously, when choosing a control valve with a reduced capacity, the valve will not be able to provide the required steam flow for a given pressure drop. As a result, the temperature and pressure of the steam behind the valve will be lower than required for the normal flow of technological processes.

What to look for when choosing a valve

Noise is an important parameter to consider when choosing a control valve. The valve must be selected in such a way that the steam flow rate at the outlet of the control valve does not exceed 0.3 of the speed of sound. Often this parameter is exceeded due to the fact that the nominal diameter of the selected valve is too small with sufficient bandwidth saddles.

Some types of control valves, such as Spirax Sarco "C" series valves, are specially designed to reduce noise levels. In these valves, the seat-plug pair is a pair of perforated cylinders, which helps to reduce noise and cavitation when using liquid valves. Depending on the complexity of the given specifications the number of these steps can be up to three.

High velocities of steam in the valve often lead to erosive failure of the valve body, especially if the steam is wet. One of the most effective ways To combat this, install a steam separator upstream of the control valve, which removes moisture drops contained in the steam and ensures the necessary dryness of the steam at the inlet to the valve.

When choosing a control valve, consider a large number of factors that make this process rather complicated. The best way To avoid potential problems, contact a reliable supplier who has sufficient knowledge, experience and can offer high quality products.

Here are some points to pay attention to:
■ Manufacturer's reputation.
■ Valve maintainability.
■ Ability to repair and maintain the valve without removing it from the pipeline and using special tools.
■ Possibility, if necessary, to change the characteristics of the valve or its throughput.
■ The need to install positioners to simplify the adjustment of control valves during commissioning and improve the accuracy of the entire control system.

Control valves VKRP (for steam) with electric drive are used to change the flow rate of working media in a liquid or gaseous state, including water, steam and air, which flow inside pipelines for various purposes. At the same time, the working media must have non-combustible, non-toxic and explosion-proof properties and create a pressure that does not exceed 2.5 MPa and a temperature of up to +220 ° C.

The design of the valve is represented by a body with a cover, a gasket, a plunger, a node sealing the stem. The valve is controlled by an electric type actuator with a manual override. For the manufacture of the valve body are used different materials, which depends on the operating conditions: gray cast iron, malleable cast iron, carbon steel. The cover on the body is made of carbon steel or stainless steel. Stainless steel is used for valve elements (seat, poppet, plunger, stem). Used as stem and gate seals EPDM + PTFE , PTFE . The delivery set includes a valve, an operating mechanism and technical documentation.

Main technical data of the valve:

· parameters of nominal diameters - from DN 15 mm to DN 250 mm;

· nominal parameters of the working pressure level - 1.6 MPa and 2.5 MPa;

· indicator of conditional throughput - from 0.63 m 3 / h to 1000 m 3 / h;

· linear type of throughput characteristic;

· rod stroke length parameters - from 16 mm to 80 mm;

· relative leakage level indicator - 0.1%;

· permissible parameters of pressure level differences on the valve ΔР - ΔР<Р1/2, но не выше 0,4 МПа (Р1 – показатель давления перед клапаном абсолютного типа);

· the lowest allowable temperature value of the passed medium: +5°С;

· the highest allowable temperature value of the medium passed through the valve: +150°С and +220°С;

· building length indicators - from 130 mm to 730 mm;

· valve weight - from 6 kg to 206 kg;

· the average duration of the service life is 5 years;

· type of connection to the pipeline - flanged.

Operational requirements for the external environment:

· extreme permissible temperature values - from +1°С to +40°С;

Among the devices used to create pipeline systems, a special place is occupied by control valves. It is a type of valve used to control the working environment. The concept of control in this case means:

medium flow control;
mixing of media passing through the pipeline in the required proportions;
maintaining the pressure in the pipeline at the desired level;
liquid level control.

Features of control valves

The use of high-quality pipeline fittings is an indispensable condition for the safe operation of the entire system. Control devices are usually installed on those sections of the pipeline where there is a branch or a turn. Thanks to special valves, it is possible to shut off the flow in a timely manner, which helps prevent the negative consequences of an accident or other problem.

In the ADL catalog you will get acquainted with a large range of devices, the use of which greatly facilitates the activity in important industrial areas: from food to oil and gas. There is also equipment designed for tying fittings.

Control valves are installed on various water pipes, both industrial and domestic. In addition, not a single pumping station or fire fighting system can do without it.

Important advantages of such fittings are:

high level of reliability - products resist high loads for a long time;
the choice of diameters is large enough, which guarantees you the opportunity to choose a copy for each specific case;
resistance to corrosion - constant exposure to water and other media will not cause disturbances in the operation of the fittings;
durability - the service life is calculated for many years;
and ease of care and maintenance. You just need to install the product in the right place, and it will perform its functions without the need to constantly check its performance.

ADL is one of the most famous manufacturers of industrial equipment in Russia and neighboring countries. Only the perfect quality of fittings!