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Shut-off and control valves with electric drive: ready-made solutions from RU100. Control valves

Motorized Control Valve is one of the main elements of pipeline fittings in the control system of a heating point, boiler house or thermal power plant. This type of equipment, by changing the flow area of ​​the control valve, changes the parameters of the working medium (water, steam, gas or other liquids). The main parameters are flow and pressure. The control valve control element is an electric actuator (electric actuator), a pneumatic actuator or a hydraulic actuator. These actuators provide continuous (analogue) or three-position (discrete) control of the control valve.
At present, the electric control valve has found the most popularity among others. An electric actuator (EIM) receives a signal from sensors through controllers (or, as they are also called, electronic regulators). The controllers, having processed and compared the signal from the sensors and the pre-configured values, supply an analog control signal (0…10V, 4…20 mA) or a three-point signal. The analog control signal depends on a value within this specified value range.

Application and purpose of a control valve with an electric drive.

The control valve can be of two types:
two way valve, equipped with an electric drive, which serves in the automation system to control the flow, temperature or pressure of the medium.
Three way control valve with an electric drive, the main function of which is mixing or separation of media flows, which makes it possible to control the system depending on the time of day or ambient temperature (weather-dependent regulation) and increase the energy efficiency of the system.
Also, electric control valves are widely used in supply ventilation systems as a control element for a heater (water-air heat exchanger) or a cooler, regulating the temperature of the air supplied to the room.

Types and types of control valve with electric drive.

The control valve with an electric drive differs in the type of connection: flanged, threaded, welded (for welding).
Welded motorized control valve quite easy to install, but difficult to dismantle.
Threaded control valve with electric actuator it is most often used in ventilation and air conditioning systems, as well as in heat engineering, where the consumption of the working medium is small. This type of connection is characterized by ease of installation and a sufficiently large ability to absorb axial forces. The disadvantage of a threaded control valve is the limited diameter of the valve. The execution of the threaded valve, according to SNiP, is limited to a diameter of 50 mm (DN50).
Flanged control valve with electric actuator it is most often used in heating substations where the use of threaded valves is not possible due to the large diameter of the valve. Also, flanged valves have a convenient type of connection, which allows you to replace the valve (for example, for cleaning) without dismantling the system as a whole.

In addition to the type of connection, a control valve with an electric drive can be classified according to the material of the valve body (and, accordingly, according to the nominal pressure Py and operating temperature Tr). LDM 2-way and 3-way control valves are available in bronze, gray iron, ductile iron, cast alloy steel and stainless steel.

In case you need to pick electric control valve, you can download the Ventily program from our website.
Also, you can fill out and send it to us via e-mail or fax.
If you need to know the cost, then you can find it in the price list for equipment. The price for a control valve with an electric drive is indicated for a set of a valve with a drive. All prices are indicated in Euro including VAT. Euro exchange rate = CBRF exchange rate on the day of invoicing. The discount is calculated depending on the volume and is specified with managers.
In addition, our specialists will be happy to answer your questions by phone, indicated in the section


The control valve is almost an automatic element in modern pipelines, mainly equipped with a mechanical drive.

Valves are designed to control the state of the working medium in the pipeline, adjust the amount of liquid, pressure level, etc.

It is reasonable to use valves with pneumatic actuators or electric actuators in large pipelines, where enormous loads act on individual components of the system. The advantage when choosing such products is given by industrialists and entrepreneurs; in civil engineering, a valve with an electric drive is much less common.

Article content

Purpose and features

The valve in its structure and purpose is in many ways similar to standard stopcocks. But they have much larger dimensions and perform a wider range of tasks.



The simplest option is shut-off, it simply blocks the flow, that is, it allows you to stop the movement of the carrier through the pipes at any time. The difference between an industrial crane and a crane is in size and principle of operation.

While in civil engineering preference is given to ball mechanisms, spools and are used in industrial valves.

They also allow you to adjust the flow force, reduce or increase it if necessary, reduce or increase the pressure. For civilian water supply systems, such areas are not interesting, there are simply no such serious loads, at least in side branches where ordinary people have access.

Another thing is industrial pipelines, capable of transporting a wide variety of liquids, ranging from ordinary pressurized water to oil.

Actually, the task of the valves comes down to adjusting and monitoring the performance of a particular branch. That is why practically - regulating.


There are, however, other solutions combined with different directions. There are shutters designed to work exclusively with pressure, controlling, etc. All of them are designed for their range of tasks and directions.

Control and use of drives

If the sample in question is regulating, then, in fact, it needs to be regulated somehow, for which handles or valves were invented. The valve handle is an enlarged copy of the stopcock handle on any pipe. Except that in civil pipelines, handles in taps can only be in two positions.

Valves are different. If, that is, it can be in different states, then its handles should give you the opportunity to make this very adjustment.


Most often, the handle rotates around its axis, allowing the locking element such as a valve or spool to be moved from a fully open position to a fully closed position.

We have already specified above that the valves it is reasonable to put only on industrial pipelines, and in industry, dozens of such devices can be installed on one branch. Obviously, twisting them all by hand is hard and thankless work.

Fortunately, the engineers found a reasonable solution - by equipping it with a mechanical drive.

The valve with a servo or electric drive can be adjusted remotely. You do not have to turn the handle yourself; for such tasks, the drive mechanism itself is used, usually remote.

He can be:

  • or electric;
  • pneumatic.

The advantage of using an electromagnetic drive is its simplicity, ease and efficiency. With an electromagnetic actuator, the valve becomes a modern locking mechanism capable of receiving remote commands or shifting the position of the valve by pressing one or more buttons.

Moreover, the presence of an electric drive allows us to install automation on the parts, which will itself assess the pressure level, the amount of fluid passing through, and then either transmit the data to the decision-making center or independently change the position of the locking elements.

The main working element is an electric engine.

They can be started manually or with the help of a relay, however, it only starts the mechanism, and the displacement of the locking element itself is carried out by a pneumatic drive.

Pneumatically actuated valves are cheaper, but they last longer and are not as fine in terms of adjustment.

Types and differences

Modern ones can work both on electricity and on pneumatics or servo drives. In the simplest versions, they are completely regulated manually. However, they differ not only in the presence or absence of drive mechanisms.


There are also differences in the adjustment system, design, etc. For example, by type of working mechanism sample occurs:

  • saddle;
  • membrane;
  • spool;
  • shut-off;
  • back.

Seats work by shifting plungers and saddles that open or close the flow path.

The diaphragm valve is distinguished by a complicated system. The membrane sample in its work uses a special membrane mainly made of rubber.

Spool mechanisms are able to perform their tasks thanks to the spool, which moves from one position to another. The spool valve is one of the oldest and most reliable, now it is quite rare in the industry.

The locking element is rather a separate subspecies of such products. The presence of the prefix "shut-off" means that the sample allows you to completely block the flow of the carrier in any direction.

Allows the wearer to pass in one direction only.

Control valve design overview (video)

There are also solutions on the market that are not used in pipelines, but at the same time have all the properties and characteristics of valves with actuators. A striking example is the flip mechanism. The toggle valve is designed for agricultural applications. The task that the toggle mechanism performs is simple and concise. It regulates the process of unloading and supplying grain at enterprises related to agricultural land cultivation or animal husbandry.

The toggle mechanism is equipped with a drive, so every time the need arises, a person does not have to turn the knobs or valves on his own, just press the button and the toggle drive will change the direction of the grain supply.

Connection type

The type of connection is distinguished sample:

  • flanged;
  • welded.

The flange option is the most convenient for industrial connections. The flange type of connection allows you to mount any parts on any pipes, as long as their nominal diameters correspond to each other. It does not matter whether it is a sewer check valve or a device for automatic pressure level control, in any case, it is the flange type of connection that is best suited for its installation.

It is undesirable to use a welded type of connection when it is necessary to mount a reverse mechanism, removable models and valves. Welding gives excellent tightness at the expense of mobility.

The complexity of engineering systems is increasing every year, the requirements for their energy efficiency, reliability, and safety are increasing, which dictates the use of modern pipeline valves, primarily regulating ones.

In this article, we will consider the main types of control valves that play an important role in solving the above problems, as well as analyze some of the features of control valves supplied by ADL with PS-Automation (Germany) electric actuators.

It is known that direct acting control valves use the energy of the same medium to control the parameters of the flow of the working medium in a certain section of the technological system or pipeline. Due to this, the advantages of this type of valve are: independence from external energy sources, control accuracy, as well as reliability. However, there is also a drawback, which often greatly complicates and limits the use of direct acting regulators - this is the lack of flexibility. In other words, each regulator is designed to be used over a very narrow range of system parameters. For example, if we are using a direct acting pressure regulator to control an outlet pressure of 5 bar, then to change the setting to, say, 10 bar (all other parameters are the same), we will most likely need a completely different valve.

There are the following types of direct acting regulators:

  • pressure reducing valves (downstream pressure regulators) designed to maintain a constant outlet pressure regardless of changes in inlet pressure or flow;
  • bypass valves (upstream pressure regulators), which maintain a constant pressure in front of the valve by bypassing part of the medium;
  • differential pressure regulators, which serve to maintain a constant pressure differential between two setpoints in the system;
  • special regulators (following pressure regulators, hydraulic shock absorbers, etc.)

Indirect control valves, on the contrary, use external energy, such as electricity (electric actuator), compressed gas energy (pneumatic actuator), etc. The control signal for such regulators is also external. The signal comes from a logic device that directly implements the control algorithms in the system. Indirect control valves thus provide much-needed flexibility. For example, to control different pressures or even to control other parameters, in some cases, the same control valve with an actuator can be used. Of course, systems using indirect-acting regulators are much more complicated than systems using direct-acting regulators, which often negatively affects both the speed of regulation and reliability indicators. However, modern electric drives make it possible to eliminate these shortcomings. Such electric drives include, in particular, drives manufactured by PS-Automation GmbH (Germany), exclusively supplied to the Russian market by ADL.

So, linear electric actuators are used to control control valves. Let's take a closer look at the features of linear electric drives of the PSL and PSL-AMS series manufactured by PS-Automation (Germany).

The PSL series actuators are designed in a modular way, which allows you to get maximum functionality at minimum cost. PSL actuators meet all the requirements for control valves: precise positioning, robustness, reliability and durability, even under high loads. The basis is a standard actuator with three-position control and the necessary set of protection functions. At the same time, the characteristics of the drive can vary greatly depending on the installation of additional options. For example, installing a positioner and potentiometer board on the actuator allows the actuator to be controlled by an analog signal (eg 4…20mA, 2-10V, etc.). In accordance with the tasks of the customer, ADL specialists modify the electric drives of control valves, make the necessary adjustments and testing. An important advantage is that the functionality of the drive can be changed after it has been delivered and even installed in the system. Most drive options can be purchased separately, including:

  • positioner with active output signal;
  • potentiometer;
  • position signal converter;
  • additional limit switches;
  • heating resistor, etc.

To increase the reliability of the system, PSL electric drives are equipped with the following protection functions:

  • automatic shutdown of the drive when the end position is reached;
  • automatic shutdown of the drive when the maximum linear force is reached;
  • automatic shutdown of the drive at the risk of overheating of the motor windings;
  • the ability to determine the positioning in the event of a break in the supply or control network; Moreover, this position (normally open, normally closed, current) can be changed directly on the pipeline using a switch.
  • manual doubler.

The PSL-AMS series intelligent linear actuators have advanced microprocessor-based electronic circuitry with a memory card, which ensures reliable and accurate control, as well as simple commissioning and easy adjustment.

Electric current and voltage monitoring functions allow you to customize the operation of the drive for specific system conditions. So, through the special communication software PSCS (supplied as standard), you can set various parameters of the drive, corrective data, carry out diagnostics and much more.

Intelligent electric drives of the PSL-AMS series also have a number of additional options, such as: a local control function on the housing that allows you to configure the operation of the drive at the installation site, as well as block access to its control, an integrated PID process controller that monitors and controls the set parameters work with the ability to program any non-standard drive behavior, intelligent control protocols (HART, Ethernet, Bluetooth, etc.), etc.

All of the above series of linear electric actuators have an IP65 or IP67 protection class and can be manufactured in a metal case.

PS-Automation electric actuators are successfully used by ADL to complete control valves of its own and European production. The range of control valves is represented by two-way single-seated (both balanced and unbalanced design) and three-way valves in the range of diameters from DN 15 to 300 mm, pressures from PN 16 to 40 bar, for media with temperatures up to 300 °C.

It should be especially noted that the installation of the electric actuator on the control valve, its adjustment and testing are carried out at the production complex of our company, which guarantees operability, minimum delivery time, and also allows us to manufacture a special version of the control valve for the requirements of a particular system.

Below we present only the most basic characteristics of control valves supplied by our company.

  • Valve capacity: 1.7…1030 m3/h;
  • Body material: brass, cast iron, carbon steel, stainless steel;
  • Drive supply voltage: 10, 24, 110, 220, 380V;
  • Control signal: three-position, analog, HART, etc.;
  • Linear drive force: 1.000…25.000 N;
  • Ambient temperature: -40..+80°C;

Control valves of both direct and indirect action from the ADL Company have many years of experience in operation at housing and communal facilities, and are successfully used by leading enterprises in various industries. Among the objects where our control valves are installed are: the complex of high-rise buildings "City of Capitals" of the business center "Moscow-City", the Cathedral of Christ the Savior, the Reutov heating system and many others.

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Among the variety of pipeline fittings, the control valve is especially popular. It is designed to control the parameters of the transported medium in pipelines for various purposes. Adjustment is carried out by changing the throughput of the valve. Various types of actuators are used for automated control of control valves. They are used in pipelines, individual elements of which are subjected to significant loads, and can be electrical or pneumatic.

Devices with electric drives are in demand in boiler houses, heating and ventilation networks and at heating points. Valves with pneumatic actuators are installed in industries where air control is carried out. Pneumatically actuated valves are also used in explosive pipelines and for outdoor adjustment.

Purpose and features of control valves with actuators

Unlike shut-off valves, which are designed to close completely, control valves are used to control and change the volume of the conveyed medium. Such functions are in demand on industrial pipelines used to move:

  • gaseous and liquid substances;
  • pair;
  • oil and its derivatives.

The control valve with a drive allows you to vary the pressure indicators, regulate the flows of the transported medium and control the performance of the lines.

Control and use of drives


Compared to domestic pipelines, industrial pipelines are longer and more intensive. To regulate the conveyed medium, many valves are required, which are difficult to operate manually. Equipping control valves with various actuator options simplifies the control of pipeline operation and allows you to change parameters remotely. The use of valve control mechanisms with a mechanical drive provides effective control of technological processes. With the help of actuators, it is possible to continuously monitor the parameters of transported liquids or gases, and prevent accidents. The actuator prevents the reverse movement of transported substances, and protects against hydraulic shocks.

In order for the drive mechanisms to perform their functions, the following rules must be observed:

  • When mounting the control valve, the direction of movement of the working medium must match the arrows shown on the device body.
  • Valves can be fixed vertically and horizontally. However, the actuator that drives the locking element must be positioned from above.
  • Pipelines should be firmly fixed, providing reliable protection against vibrations.

If the valve actuator fails, it may need to be replaced. To simplify dismantling, it is necessary to provide access to the control valve and its elements.

Variants of valves with actuators and their differences

Drive mechanisms are used to convert the initial control signal coming from an external source into the movement of the locking element. Depending on the energy used, the following types of valves are distinguished for regulating the flow of transported substances:

  • Valves with pneumatic actuator. Compressed air pressure serves as an energy source for the actuators of such valves. Depending on the type of PIM, there are membrane and piston devices. If a shut-off valve is equipped with a piston mechanism, then it belongs to protective fittings.
  • With electric actuator. Structurally, the electric drive consists of an electric motor, a control system and a gearbox. Electricity serves as the energy source for such valves, and the conveyed medium can be controlled using a remote device. With motorized valves, there is a good interaction between the motor and the control panel, even at considerable distances between them.
  • With electromagnetic drive. For valves with electromagnetic actuators, the transformation of energy for moving the closing element occurs due to electromagnets. It is an integral part of the actuator, and depending on the nuances of the design, it can be block or built-in.

Valves with pneumatic actuators are reliable, easy to operate and are used at high-risk facilities. Pneumatics are cheaper than devices with servo drives, but have significant overall dimensions.

Valves with electric actuators easy to install and reconfigure. They interact with telemetry devices, computers and other controls. Valves with electric actuators are manufactured in general industrial and explosion-proof versions, which are in demand on gas pipelines. Among the disadvantages of electrically actuated valves are increased sensitivity to humidity and temperature, as well as shutdown of the engine in case of power failure.

Solenoid operated valves are in demand in automated control systems that regulate the flow parameters of moving media. Valves with a servo drive have a resource that is measured by 10,000 or more cycles of operation of the locking element. They are precise in regulation and respond promptly to given signals.

Important information: according to GOST 12893-2005, valves with electric drives and other types of actuators are normally open and normally closed. NO open completely in the absence of a control signal, and NC - remain with a closed flow area. Proper combination of fittings of different types allows you to avoid additional damage during power outages and other emergencies.

Valves with a mechanical drive also differ in the type of operating element. Depending on the nuances of the design of the locking mechanism, they are:

  • Golden. The functions of the locking element are performed by a spool, the rotation of which allows you to adjust the parameters of the moving working medium. It does not provide complete tightness, therefore it is usually used on lines with low pressure indicators.
  • Saddle. A plunger serves as a locking device, which reduces the throughput by moving through one or two saddles. By design, the shut-off element of the valve is represented by devices of a rod, poppet or needle type.
  • Membrane. The parameters of the transported medium are controlled using an elastic membrane. To eliminate errors that sometimes occur during control, diaphragm valves are equipped with elements designed to control the position of the stem.

Complete shutdown of the working medium is performed using shut-off valves, which are also equipped with a servo drive. The design of the locking device ensures the tightness of the nodes and is indispensable in the pipelines through which liquids and gas are transported.

Connection Method

According to the principle of connection with the pipeline, the following valve options are distinguished:

  • Flanged. Such valves are equipped with flanges in the form of discs with bolt holes and can be used on high pressure lines. The fittings are designed for multiple installation and dismantling, which allows you to quickly change equipment in case of damage.
  • Under welding. Valves, which are fixed to the lines by welding, are used to control the flow of the working medium with increased requirements for tightness. As a result, a permanent connection is formed, which complicates the replacement of fittings.

Important information: installation of valves for welding is carried out in accordance with the provisions of GOST 16037-80, unless otherwise provided by the design documentation for valves.

With this article, we begin a series of materials on individual elements of automation systems. In the first article, we will get acquainted with the purpose, device and principle of operation of electric solenoid valves.

Valves are devices that regulate: pressure, temperature, direction of flow of liquid or gas in a pipeline.

All valves can be divided into non-adjustable and adjustable, in which the geometric dimensions of the working windows or their number depend not only on the parameters of the fluid flow, but also on external influences.We can distinguish valves: overflow, pressure reducing, safety, check and switching.

Adjustable valve - a valve that changes the flow rate of liquid (gas) that enters the object of regulation or is discharged from it.

An adjustable valve is a variable hydraulic resistance with a variable flow area from zero (when the plunger is seated in the seat) to a maximum (when the valve is fully open) and with a variable coefficient of local resistance, because the flow velocity changes in magnitude and direction.Most often, an adjustable valve is articulated with actuators and usually makes up one common unit structurally with them.

Motorized valves are one of the most demanded types of pipeline equipment. With their help, you can block and adjust the characteristics of the movement of the flow of liquid or gas, eliminate the emergency. They are widely used in public utilities, gas and oil industries, and in agriculture.

The advantages of these devices include: high speed of opening the flow or its overlap, reliability and durability in operation. The electric actuator provides the ability to work with the valves remotely, from the control panel.

Mechanisms meet high standards for precise control of the temperature of hot water, for supplying it to the heating system. The material from which the valve is made, working with an electric drive, can withstand large pressure drops. Electric actuators are made with safety function.

pressure regulator- a control valve with an electric drive monitors the pressure of the working medium in the pipeline section or in the technological system. Such a device consists of functionally dependent parts: distributing the action on the control part and a control valve that acts on the mass of gas or liquid.

The executive mechanism of such a system is. The main purpose of regulatory mechanisms is to control technological processes in production. The device allows continuous monitoring of the characteristics of the working medium (pressure, water or gas flow, temperature ...), and also prevents emergency situations by instantly turning on the locking equipment, protects the lines from hydraulic shocks, and prevents the return passage of working media.

When mounting the adjusting mechanism, it is necessary to trace the direction of the mass of water or gas along the arrows that are shown on the body.

The pipelines on which the control valve is installed must be laid evenly and securely fixed, as well as protected from vibrations. The device can be mounted both vertically and horizontally, but the drive must always be on top. Be sure to leave space for dismantling or mounting the drive.

Three way mechanism

A three-way valve with an electric drive does not change the direction of movement of the liquid mass, its pressure is constant, only the proportions of the passage of cold and hot water change. The design of the device is such that both cold and hot liquids are suitable for it, and a mixture of the desired temperature is obtained at the outlet.

A fairly simple design of the part is a housing in which two inlets and one outlet are located. The regulating element is either a rod of a certain design, which can move in the vertical direction, or a ball rotating around a fixed axis. The working element does not completely block the mechanism, but only directs the flows of gas or water so that they mix.

The drive system, receiving commands from sensors, allows you to change the temperature of the liquid in automatic mode. The electrically driven three-way part has received the most precise adjustment, therefore it is most widely used.

The electric drive with which the device is completed can be either a servo drive. A solenoid is a coil with a core through which an electric current flows, i.e. electromagnet. A servo drive is a device in which an input electrical signal controls mechanical movement using a compact electric motor.

The materials from which they are made - this equipment includes cast iron, steel and brass. Steel and cast iron devices are installed in pipelines with a large passage of water or gas. Small parts are made of brass.

Three-way devices are in demand products, since there are simply no analogues that could replace them. Only this equipment can ensure that the temperature of the working environment is maintained at the proper level. The technology for the execution of three-way mechanisms has been perfectly developed. The range of these products is such that the product will satisfy any request.

A complex technical device has a considerable price, but it ensures reliability and durability during operation.

Locking mechanism

Shut-off valve with electric drive- This is a locking valve made in the form of a valve. The element blocking the flow of water or gas moves parallel to the axis of this flow. Such devices are used to completely block the flow cross section. Such a locking element is the spool, which can only be in the “open” or “closed” positions during the entire operation.

They also manufacture shut-off and control equipment, which has an additional function of regulating the flow rate of the passing fluid.

Until 1982, valves of this type were called valves, but Gosts canceled this name.

These devices are widely used as shut-off valves due to reliable sealing with a spool and structural simplicity of execution. They are used for gaseous and liquid media with a wide range of operating characteristics: temperatures from -200 o C to +600 o C; pressure from 0.7 Pa to 250 MPa.

Equipment of this type is installed on lines with a small diameter, otherwise great efforts or a complicated design will be needed to properly install the shutter into the housing. A new modification of the locking device, which has a worm gear placed in a body with a cover, an electric drive, inlet and outlet flanges, a fixed sealed seat and a movable gate.

The bolt position indicator mechanism is a housing with a movable bushing, which has an internal thread. The rotation stopper and the scale located on the outside indicate in which position the shutter is located. The shutter location indicator mechanism is mounted on the worm shaft.

One revolution of the worm corresponds to a movement of the pointer by 1 mm. The result was an increase in shutter position measurement accuracy. In addition, this design of the valve made it possible to reduce the effort to move the shutter.

If a locking mechanism is used in some area, then multi-turn electric actuators are used to control it. The shut-off valve with an electric drive closes and opens the pipeline system, while changing the pressure in the system, changing the direction of the fluid flow in the pipeline.

Advantages of a shut-off valve with an electric drive:

  • the possibility of slow closing or opening of the pipeline, as a result of which the force of the "hydraulic" shock is reduced;
  • simple design makes it easier to maintain the equipment;
  • wide range of operating temperatures and pressures;
  • small size devices.

The element has a high power and high reliability in operation. The device belongs to energy-saving equipment, as it has the ability to switch to two degrees of power, which allows you to save electricity.