Faucets

Features of the use of a shut-off and control valve with an electric drive. Motorized Control Valves Motorized Water Pressure Control Valve

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

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 highways 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.

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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IN STOCK

Wednesday:
Media pressure: 16 bar
Medium temperature:-20...+150°С
Materials:
Type of drive:

DN 15 ΔP 16	RUB 30,072
DN 20 ΔP 16	RUB 31,575
DN 25 ΔP 16	RUB 31,997
DN 32 ΔP 16	RUB 37,176
DN 40 ΔP 16	RUB 38,556
DN 50 ΔP 16	RUB 40,283
DN 65 ΔP 16	RUB 49,776
DN 80 ΔP 7	on request
DN 100 ΔP 3	on request

IN STOCK

Wednesday: air, water, steam, gas, etc.
Media pressure: 16 bar
Medium temperature:-20...+150°С
Materials: body - cast iron, seal in the gate - fluoroplastic
Type of drive: Electric drive Belimo (Switzerland)

KR310

Wednesday: air, water, steam, gas, etc.
Media pressure: 16 bar
Medium temperature:-20...+150°С
Materials: body - cast iron, seal in the gate - fluoroplastic
Type of drive:

DN 15 ΔP 16	RUB 33,379
DN 20 ΔP 16	34 103 rub.
DN 25 ΔP 16	RUB 35,078
DN 32 ΔP 16	RUB 40,347
DN 40 ΔP 16	RUB 41,779
DN 50 ΔP 16	RUB 43,421
DN 65 ΔP 16	RUB 54,394
DN 80 ΔP 16	RUB 58,731
DN 100 ΔP 12	RUB 67,969
DN 150 ΔP 8	RUB 162,699
DN 125 ΔP 12	RUB 110,192
DN 200 ΔP 8	RUB 208,561

KR112

Wednesday: air, water, steam, gas, etc.
Media pressure: 16 bar
Medium temperature:-15...+300°C
Materials:
Type of drive: Electric drive Regada (Slovakia)

DN 15	RUB 50,070
DN 20	RUB 51,365
DN 25	RUB 52,363
DN 32	RUB 60,368
DN 40	RUB 86,123
DN 50	RUB 64,143
DN 65	RUB 81,523
DN 80	RUB 87,318
DN 100	RUB 104,125
DN 125	RUB 163,415
DN 150	RUB 241,629
DN 200	RUB 312,633
DN 250	RUB 458,542
DN 300	RUB 562,308

Wednesday: air, water, steam, gas, etc.
Media pressure: 16 bar
Medium temperature:-15...+300°C
Materials: body - cast iron, seal in the gate - "metal to metal"
Type of drive: Electric drive Regada (Slovakia)

Wednesday: air, water, steam, etc.
Media pressure: 16 bar
Medium temperature:-15...+300°C
Materials:
Type of drive: Electric drive Regada (Slovakia)

KR119

Wednesday:
Media pressure: 16, 25, 40 bar
Medium temperature:-60...+560°C
Materials:
Type of drive: Electric drive Regada (Slovakia)

DN 15	RUB 75,761
DN 20	RUB 78,013
DN 25	RUB 80,306
DN 32	RUB 90,584
DN 40	RUB 95,794
DN 50	RUB 105,310
DN 65	RUB 124,606
DN 80	RUB 143,197
DN 100	RUB 173,151
DN 125	RUB 272,246
DN 150	RUB 403,863
DN 200	504 106 rub.
DN 250	RUB 682,230
DN 300	RUB 852,524

Wednesday: air, water, steam, oil products, etc.
Media pressure: 16, 25, 40 bar
Medium temperature:-60...+560°C
Materials: body - stainless steel, seal in the gate - "metal to metal"
Type of drive: Electric drive Regada (Slovakia)

KR113

Wednesday: air, water, steam, gas, etc.
Media pressure: 16, 25, 40 bar
Medium temperature:-40...+425°С
Materials:
Type of drive: Electric drive Regada (Slovakia)

DN 15	RUB 56,163
DN 20	RUB 56,558
DN 25	RUB 58,236
DN 32	RUB 66,354
DN 40	RUB 67,148
DN 50	RUB 69,254
DN 65	RUB 88,646
DN 80	RUB 95,699
DN 100	RUB 109,567
DN 125	RUB 188,749
DN 150	RUB 278,835
DN 200	RUB 343,262
DN 250	RUB 537,716
DN 300	RUB 658,603

Wednesday: air, water, steam, gas, etc.
Media pressure: 16, 25, 40 bar
Medium temperature:-40...+425°С
Materials: body - steel 25L, seal in the gate - "metal to metal"
Type of drive: Electric drive Regada (Slovakia)

KR111

DN 15	RUB 42,990
DN 20	RUB 51,365
DN 25	RUB 52,363
DN 32	RUB 60,368
DN 40	RUB 61,692
DN 50	RUB 64,143
DN 65	RUB 81,523
DN 80	RUB 87,318
DN 100	RUB 104,125
DN 125	RUB 163,415
DN 150	RUB 241,629
DN 200	RUB 312,633
DN 250	RUB 458,542
DN 300	RUB 562,308

KR127

Wednesday: air, water, steam, etc.
Media pressure: 16 bar
Medium temperature:-15...+300°C
Materials: body - cast iron SCh20, seal in the gate - "metal to metal"
Type of drive: Electric drive Regada (Slovakia)

DN 15	on request
DN 20	on request
DN 25	on request
DN 32	on request
DN 40	on request
DN 50	on request
DN 65	on request
DN 80	on request
DN 100	on request
DN 125	on request
DN 150	on request
DN 200	on request
DN 250	on request
DN 300	on request

KR116

DN 15	on request
DN 20	on request
DN 25	on request
DN 32	on request
DN 40	on request
DN 50	on request
DN 65	on request
DN 80	on request
DN 100	on request
DN 125	on request
DN 150	on request
DN 200	on request
DN 250	on request
DN 300	on request

KR122

DN 15	RUB 62,858
DN 20	RUB 64,727
DN 25	RUB 66,629
DN 32	RUB 80,620
DN 40	RUB 83,247
DN 50	RUB 91,785
DN 65	RUB 119,408
DN 80	RUB 137,214
DN 100	RUB 165,928
DN 125	RUB 261,290
DN 150	RUB 387,018
DN 200	RUB 459,953
DN 250	RUB 622,775
DN 300	RUB 778,041

BL551

Wednesday: water, glycols (up to 50%), etc.
Media pressure: 16 bar
Medium temperature:+5...+120°С
Materials: body - brass, stem seal - EPDM
Type of drive: Electric drive Belimo (Switzerland)

DN 15, H412B with LV230A-TPC	on request
DN 20, H420B with LV230A-TPC	on request
DN 25, H425B with LV230A-TPC	on request
DN 32, H432B with LV230A-TPC	on request
DN 40, H440B with NV230A-TPC	on request
DN 50, H450B with NV230A-TPC	on request