A Complete Guide about Electric Control Valve

The electric control valve is a power-operated device that regulates a streamlined flow of gases, steam, water, and oil. It is considered one of the most important components used in industries to regulate the flow of materials.

Read this guide to find detailed information about working, application, advantages, and electric control valve pricing.

1# What Is the Working Principle Of An Electric Control Valve?

Electric control valve works on the principle of electromagnetic induction. It has a solenoid valve which is an electric coil. In its central position, it has a plunger or ferromagnetic core. When the solenoid valve is at rest position, its plunger closes a small orifice. When it is working, an electric current passes through a coil that creates a magnetic field. This magnetic field creates a force in an upward direction. Hence, it opens the orifice. This opening allows the liquids and gases to pass through it—however, the direction of flow of materials and exerted force work in the opposite directions.

2# Which Factors Maintain A Steady Flow Of Materials Through Orifice?

The flow of liquids and gases in an electric control valve depends on these two factors:

1. Orifice Diameter:

The orifice diameter plays a central role in maintaining a flow rate and maximum operating pressure. A small orifice diameter generates more pressure and a more speedy flow of materials through it. Hence, you can easily maintain pressure differences from 0 bars up to the maximum allowable pressure ranges.

2. Magnetic Force:

The amount of electric force generated is directly proportional to the flow of materials through an orifice. Therefore, more magnetic force means a more steady flow of materials. However, a permanent magnet generates a stronger magnetic field than a regular coil.

3# How To Select The Right Type Of Electric Control Valve For Industrial Applications?

• Determine the industrial requirements before buying an electric control valve
• Determine its AC or DC version to maintain the functionality of valves
• Determine the valve operating time. A valve with a more extended opening operating time is suitable for high-performance industrial applications.
• Determine minimum and maximum pressure ranges suitable for your industrial applications
• Determine the temperature ranges that a valve can withstand, affecting viscosity and flow of materials
• Determine IP rating of an electric control valve against dirt, moisture, rust, corrosion, and contact

Determine the surface coating material that makes a valve suitable for working under critical industrial conditions

4# What Are The Reasons For Failure Of An Electric Control Valve?

Any failure in an electric control valve can lead to massive destruction and irreversible damages to the industrial environment. Below are some common reasons that lead to the failure of valves:

1. Accumulation of grease, dirt, or debris in the pipeline
2. Working under excessively high pressure or temperature conditions
3. Poor maintenance over time
4. Inaccurate installation
5. Improper assembly of body parts
6. Worn seals or elastomers
7. Improper supply of electric current
8. Inappropriate use of electric control valve

Contact us for recommendations if you encounter leakage, noise, the excessive outflow of materials, or any of the symptoms mentioned above.

5# How To Increase Life Span Of An Electric Control Valve?

Follow these simple guidelines to increase the shelf life of an electric control valve:

1. Pay attention to preventive maintenance tasks to avoid failures
2. Keep the pipelines and valves cleans from the accumulation of contaminants and debris
3. Install filters or flush the pumps to maintain an accurate flow of materials
4. Regularly lubricate the valves to enhance performance and ensure a proper operation
5. Replace the valves regularly to ensure optimum operation
6. Always select the right type of valve to prevent damage or failure
7. Regularly monitor working conditions to maintain a smooth flow of materials
8. Install a fast-closing valve check to avoid pressure surges

6# What Are The Applications Of An Electric Control Valve?

An electric control valve is suitable for a variety of industrial applications. Here is a list of industries in which control actuators are used significantly:

1. Pressure controlled boiler generated steam system or feedwater control system
2. Oil & gas refinery companies
3. Petrochemical industries
4. Chemical industries
5. الصناعات الدوائية
6. صناعات الأغذية والمشروبات
7. Paint industries
8. Cosmetic industries
9. Water treatment plants
10. Autoclave and other high-pressure devices

If you are looking for other intended applications, let us know. BCST manufactures customized electric control valves to meet your industrial requirements. Call us for more details!

7# What Are The Components Of An Electric Control Valve?

An electric control valve consists of the following parts that work synergistically to maintain an efficient flow of liquids and gases.

1. Valve Body:

An electric control valve has either a reciprocating or rotating body.

2. Actuating Device:

It has an actuating device that is usually a spring diaphragm.

3. Valve Positioner:

The valve positioner is a device that converts electric control signal from a controller device into an air signal. Thus, it controls the position of the entire system.

4. Air set:

An air set or regulator maintains an accurate pressure level to the positioner. It smoothly channelizes air in the valve.

8# What Are The Most Reliable Materials For Manufacturing Of An Electric Control Valve?

An electric control valve is available in the following materials:

1. حديد مصبوب
2. Cast steel
3. Ductile steel
4. الفولاذ المقاوم للصدأ 304 و304L و304L و316 و316L
5. Brass
6. برونزية
7. Special alloy steel
8. Metal alloy

You can contact our production team members to customize the electric control valve in any material to meet your industrial requirements. The selection of material is made by analyzing your requirements and intended industrial applications. The critical working conditions also play a significant role in choosing the suitable material for manufacturing an electric control valve.

9# What Type Of Media Are Suitable For An Electric Control Valve?

The electric control valve is suitable for a variety of applications. However, when you are selecting an electric control valve, it is important to determine its compatibility with materials. An electric actuator is suitable to maintain a streamlined flow of the following materials:

1. Gases
2. Lubricated and non-lubricated liquids
3. Suspended solids

These three types of media are super reliable for all types of electric actuators. Moreover, it is also significant to analyze the working environment, including the media’s temperature, pressure, and corrosiveness.  You can also consult our professional team members about important materials suitable for an electric control valve.

10# What Are Three Body Types Of Electric Control Valve Ports?

Three-body types of electric control valve ports include:

1. Single Port: It is the most common electric control valve design suitable for stringent shut-off requirements. During high-pressure applications, it loads the entire area.
2. Double Port: It is suitable for materials with varying degrees of temperature and a large amount of fluid passing through the valve.
3. Three Port: It is used to mix or divert the materials passing through it. It also maintains a balance through the distribution system.

You can order customized electric actuators from BCST in different port designs & body types according to the industrial applications at very affordable rates.

11# What Are The Features Of An Electric Control Valve?

Following are the features of an electric control valve:

1. Reduced or no leakage
2. Heat, fire, high temperature, and high-pressure resistant
3. Suitable for acidic, alkali, or corrosive working environments
4. Compatible with a variety of materials
5. Suitable for multiple industrial applications
6. Easy to install and maintain
7. Withstand pressure up to 2000 psi
8. Withstand temperature ranging from -20C to 600C
9. Available in various port designs
10. Maintain a streamlined flow of liquids, gases, and semi-solid materials

The features mentioned above of electric actuators make them reliable for different industries. All you need to monitor their performance to ensure the best results regularly.

12# How To Test The Body Of An Electric Control Valve?

Use a blind flange to blind the output of the control valve. Check the body rating of the control valve. Open the valve at the time of testing. Now perform the test.

The amount of total pressure that a body can withstand without leakage is called body rating.

1. Determine the body leakage
2. Determine the pressure of water through the inlet valve. It should be 450 psi. Check it through the pump producer and master gauge.
3. Close the mechanical valve and check leakage. If there is no leakage from the outlet valves, a body test has confirmed the performance of the electric control valve.

13# How To Perform Flow Test?

You can efficiently perform flow tests to determine leakage and streamline the flow of materials through the electric control valve.

1. Open the outlet of the control valve
2. Use air o water as test media
3. Close the mechanical valve
4. Apply 450 psi pressure to determine the streamlined flow of liquids and gases. At this stage, also check the leakage.

If you observe any leakage, identify damages in the trim, actuator, and valve stem system. Probably, when these devices fail to connect properly, leakage occurs. Repair these damages to maintain a steady flow of gases, liquids, and semi-solid materials.

14# How To Perform A Function Test?

Function test determines the performance and functionality of an electric control valve. Please follow these simple guidelines to perform a function test:

1. Assemble all the valves accurately
2. Set up instrument air supply, current generator, valve, and i/p converter
3. Calibrate the electric actuator
4. Check the instrument air supply. Try to set it according to the requirements of the i/p converter
5. Apply 4 mA current and make sure 0% travel in the system
6. Apply 20 mA current and make sure 100% travel in the system
7. Check the flow of current during the controlled flow of liquids and gases

15# What Tests Are Performed To Check An Electric Control Valve?

BCST performs the below-mentioned tests to check the functionality and performance of an electric control valve:

1. Face-to-face dimensions and flange facing & dimension test
2. Chemical analysis and mechanical properties test
3. Non-destructive test
4. Hydrostatic test
5. Seat leakage test
6. Actuator leakage test
7. Electric-type and routine test functional test
8. Flow test
9. Functionality and performance test

Our experts perform these tests under strict supervision and internationally accepted laboratory-controlled conditions. We have the latest tools and pieces of lab equipment to perform these tests. Do not try these tests yourself to avoid serious injuries.

16# How To Troubleshoot When Valve Is Not Opening Or Closing?

If the value of an electric control actuator is not opening or closing, you can troubleshoot it in the following ways:

1. Check the voltage supply to an electric control valve
2. Check the valve alignment with flanges
3. Remove actuator or use the spanner to check the binding of valve with flange
4. Check the electric current supply to valves
5. Check contamination in the valves

Closely monitor these stages to troubleshoot the working condition of an electric control valve. If you cannot troubleshoot the root cause, contact our trusted team members to solve your problem in just a few minutes.

17# How Much Amount Of Electric Current Closes Or Opens Valves?

An electric control valve requires either 4-20 mA or 0-10 V DC signal input. The input of 4 mA or 0 V closes the valve. Similarly, the input of 20 mA or 10 V DC opens the valve. However, any signal in between these two situations corresponds to a proportional situation. These input signal modulations are according to the industrial requirements. Therefore, any change in the signal input can lead to drastic changes in the output of an electric control valve. Moreover, this input signal can also be modulated as per industrial requirements to maintain a steady flow of liquids and gases.

18# What Are The Benefits Of Using An Electric Control Valve?

A heavy-duty electric control valve offers the following benefits:

1. Reduce equipment cost up to 1/5
2. Reduce energy consumption up to 1/10
3. Battery operated device for fail-safe operation
4. Stepping motor with high resolution of 1/1000 and high thrust of 5000 N
5. Compact and simple structure
6. Ensure high performance
7. Easy-to-use digital control panel
8. Shorter installation work time
9. Immediately works after connecting signal and power supply
10. Directly connects to multiple open networks for saving time and wiring efforts

You can contact our customer care center anytime to get comprehensive information about an electric control valve.

19# What Are The Disadvantages Of Using An Electric Actuator?

The advantages of using an electric control valve are many folds higher than its disadvantages. Its downsides include:

1. Slow comparative operation speed
2. Potential for catching fire as it heats up quickly
3. More susceptible to power loss
4. More expensive than other types of actuators

Besides the disadvantages mentioned above, there are no downsides to using an electric actuator. It is super reliable for a variety of industrial requirements. You can contact us to order customized electric actuators either in bulk or in small form. We guaranteed high performance and reliability to generate 100% results.

20# What Is The Average Price Of An Electric Control Valve?

The average price of an electric control valve varies from $30 to $300. BCST offers competitive market rates and high-quality products to meet the requirements of our customers. The pricing of electric actuators depends on their quantity, size, materials, and pressure monitoring capabilities. You can also order customized products at very affordable rates. However, the rates of customized electric actuators vary as per your shared specifications. It also varies according to the current market conditions. You can also contact our accounts team members to get pricing-related queries. In case of more information, please visit our website or call us.

21# How To Order A Customized Electric Control Valve From BCST?

BCST is a leading manufacturer and supplier of electric control valves. You can place customization orders in single or bulk form. However, before placing orders, you have to provide specific dimensions, including diameter, orifice size, manufacturing materials, geometry, and intended industrial applications. The expert engineers evaluate your provided information to design a custom-made strategy. Once we get approval from you, we immediately start working on it. The charges for customizations are based on the provided information. After manufacturing of products, we perform tests to evaluate the performance. BCST guarantee 100% performance and reliability of electric control valves.

22# How Long Will It Takes To Ship Your Order?

BCST is a certified supplier of the electric control valve. The warehouse is equipped with extensive inventory units and the latest technology for the manufacturing of high-quality products. However, it takes approximately 10 working days to ship your orders. In the case of special orders, you need to pay extra charges to ensure the timely shipment of products. Additionally, customized proposals require a specific duration as per your shared specifications. Orders are not delayed beyond the designated duration. You can track your booked order by entering the tracking number to check its delivery status. Please inquire your sales associate to get a detailed piece of information for the shipment.

23# What Are The Parts Of An Electric Control Valve?

A high-performance electric control valve includes the following parts:

1. المؤشر
2. Window
3. Terminal block
4. Heater
5. Motor
6. Capacitor
7. Limit switch and torque switch
8. الجسم
9. Base
10. Manual override
11. Handwheel
12. Lever
13. Worm gear
14. Drive bushing
15. Sealed terminal bung or plug/socket connector

Moreover, an electric control valve is also equipped with Fieldbus technology for automation processes. However, it requires data cables and other special connections for signal transduction. However, during the process of customization, these parts can be changed as per the shared specifications of customers.

24# What Electric Control Valve permits operations?

Electric control valve permits automatic, semi-automatic, and manual operations. These high-performance valves are suitable for high-speed opening and closing of valves. The torque of the motor or position of the valve operates the actuator of an electric control valve. Similarly, a limit switch automatically stops the fully closed or fully opened valve. The utility of all these functions depends on industrial requirements and installation facilities. Although electric actuators are expensive, it is reliable for critical applications. It is perfect for low ambient temperatures, freezing pneumatic supplying systems, large stem forces, and devices with no air supply.

25# Which Actuation Technique Is Used In An Electric Control Valve?

In an electric control valve, an electric actuation technique is used. It is actually a solenoid actuator in the electromagnetic coil. The solenoid actuator energizes and creates a magnetic force. This magnetic force pulls the armature and connects to the armature. However, it is done according to the requirements of the system.

Additionally, an electric control valve is also operated manually. Operator and critical working conditions control it. It would help if you had pushbuttons, pedals, and panels to manually control electric actuators.

26# What is the process of Installation of the electric control valve?

The electric control valve is suitable for Installation with the upper end of the working piston at the bottom of the horizontal pipe. You can install the temperature sensor appropriately, and you must immerse its entire length in the controlled medium.

Electric control valves usually include a controller, which accepts signals to control the valve for adjustment and can also form an intelligent network control system according to control needs to optimize control and realize remote monitoring.

27# What is the specification of an Electric-control-valve?

The designs of valve control assemblies can differ quite a lot from one to another. Still, they are all made according to a modular principle, consisting of three main elements: a body, a valve actuator, and a throttle assembly.

Flanged connection with pipe wire is accepted as standard, but this is not a necessary condition. Welding and coupling connections are also used. The operation of similar valves depends on a continuous source of electrical energy, which must be equipped with doublers for manual opening and closing.

An additional component is springs that automatically close the valve when the power is turned off. The main difference between the regulating nodes is the throttle assembly (simply, it is a damper mechanism that opens and closes the fluid path in the water supply system and changes its pressure).

Directly they form the key practical and technical characteristics of valves. There are over fifteen throttle assemblies for various working environments, media pressures in the middle of the pipeline, etc.

27# What are the types of Electric-control-valves?

1. Electric Actuated Control Valve
2. صمام التحكم في الكرة الأرضية الكهربائي
3. Electric Temperature control valve

1. Electric Actuated Control Valve

Electric actuated control valves provide reliable, precise, and automated control of process fluids. In addition, electric actuators provide the advantages of increased accuracy, remote operation, and elimination of costly pneumatic tubing.

Electric control valves are used in various industries and applications, including oil and gas, chemical processes, food and beverage, pharmaceutical, power generation, marine, and water and wastewater treatment. Electric actuators are available in a wide range of voltages and sizes to meet the needs of any application.

Electric control valves offer many benefits over traditional pneumatic or manual valves, including increased accuracy and repeatability, reduced maintenance costs, and improved safety. In addition, electric actuators can be controlled remotely, eliminating the need for expensive pneumatic tubing.

Electric control valves are available in a wide range of sizes and voltages to meet the needs of any application. Electric actuators are typically more expensive than pneumatic or manual actuators, but the benefits often justify the added cost.

Uses Of Electric Actuated Control Valve

Electric Actuated Control Valve is a valve that uses an electric motor to open and close the valve. Electric actuator control valves are used in many industries, such as oil and gas, water treatment, and power generation.

Electric actuator control valves are available in various sizes, materials, and designs to meet the needs of different applications. Electric actuator control valves can be operated manually or automatically. An electric switch or sensor controls automatically operated electric actuator control valves.

Electric actuator control valves are used for on/off or modulating operation. On/off operation means the electric actuator control valve is either fully open or closed. Modulating operation means the electric actuator control valve can be opened or closed at different positions between fully open and fully closed.

Electric actuator control valves can be actuated by various electric actuators, such as solenoids, motors, and switches. Electric actuators convert electrical energy into mechanical energy to operate the electric actuated control valve. Electric actuators are available in various sizes, materials, and designs to meet the needs of different applications.

2. Electric Globe Control Valve

Electric globe control valves are devices that regulate the flow of liquids or gases. Electric globe control valves are used in various industries, including oil and gas, chemical processing, food and beverage, and pharmaceutical manufacturing.

Electric globe control valves regulate the flow of liquids or gases by opening, closing, or throttling the flow. Electric globe control valves are available in various materials, including stainless steel, cast iron, brass, and bronze. Electric globe control valves are also available in a variety of sizes.

Electric globe control valves can be operated manually or automatically. Electric globe control valves are used in various applications, including flow control, pressure relief, temperature regulation, and safety relief. Electric globe control valves are an essential part of many industrial processes.

الميزات

The Electric Globe Control Valve is an easy-to-install, tamper-proof way to control water flow in your home. Screw the valve into the desired location, and then attach your garden hose or a sprinkler system to the valve.

The Electric Globe Control Valve will automatically open and close the valve based on the timer you set. You can also override the timer by opening or closing the valve manually. The Electric Globe Control Valve is a great way to save water and money, and it’s also a great way to keep your lawn or garden looking its best.

3. Electric Temperature control valve

Electric control valves regulate the flow of electricity in a circuit. They are used in various applications, including temperature control, motor speed control, and overcurrent protection.

ECVs are designed to automate the control of electrical systems and can be controlled manually or by computer. Electric temperature control valves (ETCVs) are a type of ECV used to regulate a system’s temperature. For example, ETCVs are often used in HVAC systems to control the flow of hot or cold water. Electric motor speed control valves (EMSCVs) are another ECV used to regulate an electric motor’s speed.

They are used in various applications, including conveyor belts, elevators, and escalators. Electric overcurrent protection valves are ECVs used to protect electrical circuits from damage caused by excessive current.

 It is used in various applications, including surge protector devices and circuit breakers. Electric-control valves can be divided into two main categories: hydraulic control valves and pneumatic control valves. Hydraulic control valves use fluid power to actuate.

الميزات

The Electric Temperature control valve is a device that helps regulate an engine’s temperature. BSCT is the best provider of electric temperature control valves. It is connected to the engine’s cooling system and uses a sensor to detect its temperature. If the engine gets too hot, the Electric Temperature control valve will open to allow coolant to flow through and help cool down the engine.

 Similarly, if the engine is getting too cold, the Electric Temperature control valve will close to prevent coolant from flowing through and help keep the engine warm. The Electric Temperature control valve is an essential feature of an engine, and you can find it on gasoline and diesel engines.

#28 What are the regulatory designs of Electric control valves?

Single and double-seated

In seated valves, the moving element is the plunger, which can be a needle, stem, or poppet. The plunger moves perpendicular to the axis of the medium flow through the saddle (or saddles), changing the flow area.

The most common are double-seated valves since their shutter is well balanced, which allows them to be used for continuous pressure control up to 6.3 MPa in pipelines with a diameter of up to 300 mm while using lower power actuators than single-seaters.

Due to their unbalanced plug, single-seat valves are most often used for small bore diameters. Also, the advantage of double-seat valves is that with such a design, it is much easier to provide the tightness required for shut-off and control valves using a plunger that has a unique control profile for contact with one seat and for landing in another seat, a sealing surface for tighter contact.

Cellular

The shutter of cell valves is made in a hollow cylinder, which moves inside the cell, a guiding device, and, simultaneously, a seat in the body. The cage has radial holes that allow you to regulate the flow of the medium. Previously, such valves were called perforated piston valves. Due to their design, cellular valves can reduce noise, vibration, and cavitation during valve operation.

Membrane

Valves of this type use built-in or remote diaphragm pneumatic or hydraulic actuators. In the case of a built-in drive, the flow rate of the working medium is directly changed by blocking the passage in the seat with a flexible membrane made of rubber, fluoroplastic, or polyethylene, which is affected by the pressure of the control medium.

If the actuator is remote, then the adjustment force is transmitted through the membrane to the valve stem support and through it to the regulating body; when the pressure of the control medium is released, the spring returns the diaphragm to its initial position.

So that the forces from the medium and the force of friction guides and seals did not decrease the accuracy of the valve; in such fittings, additional devices are often used – positioners that control the position of the stem.

Diaphragm valves can be either single or double-seated. The main advantage of such valves is the tightness of the movable joint and the corrosion resistance of the materials from which the membranes are made, which makes it possible to provide reasonable protection of the internal surfaces of the valve from the effects of working media, which can be aggressive.

Spools

In these devices, the regulation of the flow of the medium occurs when the spool is rotated to the required angle, unlike other valves with a translational movement of the stem or membrane. Such valves are used, as a rule, in the power industry and have the alternative name “control valve” since they belong to cranes according to the principle of operation.

#29 What are the steps to check electric-control-valve?

Below are the basic steps for checking the position of a valve positioner. Always refer to the valve manufacturer’s instructions for correct and proper positioner testing and calibration.

Testing valve opening

Press the Coarse Range button to control the valve opening upwards from 4.0 mA. The Fluke 789 Process Meter increases the value by 0.1 mA each time the Coarse Range button is pressed. When setting the point at which the valve starts to open, ensure that the actuator applies no back pressure to the force that keeps the valve closed when there is 4.0 mA at the input of the controller.

In a spring-closed valve, there should be no pressure on the diaphragm. In a double-acting piston actuator, there should be no pressure on one side of the piston.

Testing the range position

The gap position check tests the valve in the fully open position. Press the SpanCheck 100% button to reach 20 mA. Set the source current to 20 mA using the range buttons on the Fluke 789 ProcessMeter and wait for the valve to stabilize.

Use the Coarse control knob to adjust the current by oscillating between 20.1 mA and 19.9 mA. From 20.1 to 20 mA, there should be no movement in the valve body; from 20 mA to 19.9 mA, there should be a slight movement.

Testing whether the valve is working properly

Set the rotary switch to a lower output mA value and select the Slow Ramp function using the blue button.

Allow the Fluke 789 Process Meter to cycle over several cycles, noting if there is an abnormal condition while the valve is operating. The valve must not oscillate, drop, or operate sluggishly at the step positions of the Slow Ramp.

Adjust the gain of the valve controller to the point that gives the best response between these two conditions.

خلاصة القول

This guide has summarized all the essential features of an electric control valve. An electric control valve is a high-performance device to maintain a steady flow of liquids, gases, or semi-solid materials. It will help you in achieving the highest functionality rate during multiple industrial applications.

You can contact on our phone number +86 517 86989565 anytime for any query about electric control valve. كما يمكنك إرسال بريد إلكتروني على info@bsctgroup.com. نحن مستعدون دائماً لخدمتك.

To design a customized electric control valve, don’t hesitate to get in touch with BCST. We turn your dreams into reality!