What Is an Electric Actuated Valve and in Which Systems Is It Used?

In mechanical building services, HVAC and industrial fluid control systems, the valve is one of the most critical components. Today, however, classic manual valves that merely open and close the flow are no longer sufficient in most projects. That is because modern building services require automation, energy efficiency, precise temperature control, remote management and lower operating costs. This is exactly where electric actuated valve systems come into play.

An electric actuated valve is a valve system that controls the passage, direction or flow rate of a fluid by means of an electrically driven motorized mechanism. Thanks to this system, water, hot water, chilled water, superheated water, glycol, certain auxiliary circuits connected to the compressed-air line and specific process fluids can be controlled without manual intervention. In particular, the use of electric actuated valves has now become standard in fan coil installations, air handling units, chiller lines, boiler rooms, underfloor heating systems, calorifier circuits, heat pump applications and industrial automation projects.

Today, many users and buyers research the following questions in search engines: What is an electric actuated valve?Are a motorized valve and an electric actuated valve the same thing?What is the difference between a 2-way and a 3-way electric valve?Where are electric valves used?Should you choose an on/off valve or a modulating valve?Which valve is selected for fan coils?Is an electric valve needed for underfloor heating?Why does an electric valve fail?What determines the price of an electric actuated valve?

In this comprehensive guide, we will examine in detail the working principle, types, applications, selection criteria, advantages, common mistakes and the points to watch during the purchasing process of electric actuated valves. We will also touch on the brands and product groups frequently encountered in projects. In particular, alongside widely used solutions worldwide such as Siemens, Honeywell, Resideo, Danfoss, Belimo, ESBE, Oventrop, Caleffi, we will clearly explain why the right, application-specific valve selection is so important.

What Is an Electric Actuated Valve?

An electric actuated valve is a type of valve in which the opening, closing or positioning movement is carried out by an electric actuator instead of a manual lever or handwheel. When the actuator receives an electric signal, it rotates the valve stem or makes a push-pull movement to control the valve.

Put more simply:

• The valve controls the fluid.
• The actuator moves the valve.
• The control signal tells the system what to do.

In other words, an electric actuated valve is not a single body but a two-part control system:

1. Valve body
2. Electric actuator

This configuration is sometimes also referred to as a “motorized valve.” In the industry, the terms “motorized valve,” “electric valve,” “electric actuated valve” and “control valve” are often used interchangeably. Technically, however, not every motorized valve has the same level of control capability. Some products only perform on/off, while others can carry out proportional control.

How Does an Electric Actuated Valve Work?

The working principle of these valves is actually quite clear. A control need arises in the system. For example:

• The room temperature has risen
• The fan coil now requires less cooling
• The hot-water mixture in the boiler circuit needs to be adjusted
• A line needs to be fully shut off
• The automation system wants to reduce the flow rate

In this case, the thermostat, automation panel, BMS system, PLC or field control device sends a command to the actuator. The actuator, in turn, moves the valve stem according to this command. As a result, the valve:

• opens fully,
• closes fully,
• or moves to a certain intermediate position.

Thanks to this change of position, the passage of the fluid is controlled. For example, in a 3-way valve, hot water is mixed with return water. In a 2-way valve, the flow passing through the line is reduced or completely cut off.

What Is the Difference Between an Electric Actuated Valve and a Manual Valve?

With manual valves, the user opens or closes the valve by hand. This method may be sufficient for small, fixed systems. In projects that require automation, however, this solution is inadequate. That is because a manual valve:

• cannot be controlled remotely,
• does not respond instantly to temperature changes,
• is inadequate for providing energy efficiency,
• cannot be integrated into the building automation system,
• creates an operational burden in systems that require frequent adjustment.

An electric actuated valve, on the other hand:

• operates automatically,
• integrates with a thermostat or automation,
• saves energy,
• can perform precise control,
• reduces human intervention,
• increases the comfort and efficiency of the system.

For this reason, electric actuated valves are far more widely preferred in modern commercial buildings, hotels, hospitals, shopping malls, offices, factories and central building services systems.

The Main Components of an Electric Actuated Valve

To understand an electric actuated valve better, its components should be evaluated one by one.

1. Valve Body

The main part through which the fluid passes. It can be manufactured from materials such as brass, bronze, cast iron, ductile iron and stainless steel. The body structure varies according to pressure, temperature, fluid type and application area.

2. Stem and Internal Mechanism

The internal part that enables the valve to open and close. Different geometries such as a ball valve, butterfly valve, globe valve or mixing valve come into play here.

3. Electric Actuator

The motorized part that moves the valve. It converts the incoming electric signal into mechanical motion. Some models are spring-return, others are not. Some operate only on/off, while others modulate.

4. Control Signal

This signal can generally be of the following types:

• 220V on/off
• 24V on/off
• 0-10V modulating
• 2-10V control
• 3-point control
• BMS/PLC-compatible signal

5. Feedback / Auxiliary Contact

Some advanced models feed the valve position back to the system. This way, the automation system can tell whether the valve has actually opened.

What Are the Types of Electric Actuated Valves?

Electric actuated valves are classified according to several criteria. The most common distinction is as follows.

1. By Operation Type

On/Off Electric Actuated Valve

These types of valves are either fully open or fully closed. They do not perform intermediate position control. They are used for simple automation needs.

Areas of use:

• fan coil on/off control
• zone control
• small heating circuits
• simple temperature control

Advantages:

• economical
• easy to install
• simple to control
• sufficient for small systems

Modulating Electric Actuated Valve

These valves do not just perform on/off; they can adjust the valve position as a percentage. For example, they can operate at intermediate positions such as 20%, 40%, 65% and 100%.

Areas of use:

• precise temperature control
• air handling unit coils
• industrial processes
• mixing circuits
• systems requiring energy optimization

Advantages:

• more precise control
• higher energy efficiency
• more stable system temperature
• more professional automation compatibility

2. By Number of Ports

2-Way Electric Actuated Valve

It has one inlet and one outlet line. Its main task is to open, close or control the flow by throttling.

Where is it used?

• fan coil installations
• coil inlet lines
• radiator zones
• heating-cooling circuits
• independent line control

Advantage:

• provides flow control
• can optimize pump loads
• is very effective in simple circuits

3-Way Electric Actuated Valve

It has three connection ports. It is generally used for mixing or diverting purposes.

Usage types:

• mixing valve
• diverter valve (diverting)
• bypass control
• supply-return mixing

Where is it used?

• boiler circuits
• calorifier systems
• underfloor heating mixing lines
• AHU coils
• systems requiring temperature balance

3. By Valve Type

Ball-Type Electric Actuated Valve

Used in systems that require fast opening and closing. It is generally compact and practical.

Globe-Type Electric Control Valve

Preferred in systems that require more precise flow control. Its modulation performance is generally better.

Electric Actuator Mounted on a Butterfly Valve

Used in large-diameter lines. It is especially common in central building services and industrial lines.

3-Way Rotary Valve with Electric Actuator

Very frequently preferred in mixing circuits. It is especially used in boiler, underfloor heating and temperature control applications.

In Which Systems Is an Electric Actuated Valve Used?

This question is one of the topics most researched by users, because valve selection depends directly on the system type. Now let us examine the most common areas of use one by one.

1. Use in Fan Coil Systems

Fan coil units are very common in hotels, offices, residences and commercial buildings. In these units, the hot or cold water entering the coil according to the ambient temperature must be controlled. This is exactly where the electric actuated valve comes into play.

In fan coil systems, the following are generally used:

• 2-way on/off valve
• sometimes a 3-way valve
• in some projects, a modulating valve

are used.

The room thermostat sends a command according to the temperature. When the temperature reaches the desired level, the valve closes and the water flow to the fan coil coil stops. This way, energy is saved.

Why is an electric valve used in a fan coil?

• provides room-based control
• prevents unnecessary water circulation
• reduces pump and chiller load
• increases comfort
• ensures compatibility with automation

Especially in hotel and office projects, the right valve selection is very important both in terms of comfort and operating cost.

2. Use in Air Handling Unit (AHU) Systems

Air handling units have heating and cooling coils. The amount of fluid entering these coils directly affects the supply air temperature. Control with a manual valve is not possible here, because the load changes constantly.

Therefore, air handling units mostly use:

• modulating 2-way valve
• modulating 3-way valve
• high-precision control valve

are used.

The task of the electric actuated valve in AHU systems:

• to adjust the coil water flow rate
• to keep the supply temperature stable
• to integrate with the building automation
• to prevent unnecessary energy use

In this area, brands such as Belimo, Siemens, Honeywell, Danfoss are frequently researched.

3. Use in Underfloor Heating Systems

In underfloor heating systems, keeping the water temperature at the correct level is very important. That is because a high temperature disrupts comfort and can damage the floor structure. For this reason, mixing groups and zone control are of great importance.

Here, electric actuated valves are used for two main purposes:

a) Mixing control

With a 3-way motorized valve, high-temperature boiler water is mixed with the return water.

b) Zone control

To control each area separately, actuators on the manifold or zone valves are used.

The right valve selection in underfloor heating systems:

• provides more homogeneous heat distribution
• prevents excessive temperature
• reduces energy consumption
• increases user comfort

4. Use in Boiler Room and Calorifier Systems

In boiler rooms, electric actuated valves are used intensively for controlling the hot-water flow, for mixing circuits, for calorifier priority, for heat-exchanger line management and for temperature optimization.

Example applications:

• calorifier charging circuit
• boiler return protection line
• mixing circuit
• zone separation
• bypass line
• domestic hot water priority control

In these systems, 3-way mixing valves and electric actuators generally stand out.

5. Use in Chiller and Cooling Water Systems

In chiller lines, the amount of chilled water going to the coils must be controlled. When the load drops, maintaining the same flow rate creates unnecessary energy consumption. Therefore, flow control is carried out with an electric actuated valve.

Areas where it is used:

• fan coil lines
• AHU cooling coils
• process cooling circuits
• hydronic balancing applications

Benefits:

• the water flow is adjusted according to the cooling load
• pump energy is reduced
• chiller efficiency increases
• comfort fluctuation decreases

6. Use in Heat Pump Systems

In heat pump applications, motorized valves are frequently used for fluid diverting, zone control, storage tank management and temperature optimization.

For example:

• diverting between heating and domestic water
• buffer tank circuit management
• mixing line temperature control
• multi-zone control

In heat pump systems, the wrong valve selection can seriously reduce equipment performance. For this reason, the valve body, flow coefficient, control type and response time are very important here.

7. Use in Industrial Process Systems

Electric actuated valves are common not only in building services but also in industrial processes. They are used especially in the following areas:

• process water lines
• chemical dosing auxiliary circuits
• cooling water control
• temperature-controlled production lines
• tank filling-emptying management
• heat exchanger control systems

In these applications, the type of fluid is very important. For corrosive or high-temperature fluids, the valve material must be selected carefully.

8. Use in Water Treatment and Filtration Systems

The use of electric actuated valves is also increasing steadily in RO, ultrafiltration, softening, filtration and process water systems. They are particularly suitable for automatic backwashing, line diverting, tank circuit switching and process automation.

Usage examples:

• filter backwash line
• tank diverting
• process water distribution
• systems with automatic switching
• packaged treatment skids

In the treatment field, the right valve selection is important both for process safety and for equipment life.

What Does an Electric Actuated Valve Do?

The main task of these valves is to control the fluid in the system according to the desired scenario. However, the benefits behind this are much greater.

1. It controls the fluid automatically

It opens, closes or throttles exactly when the system needs it.

2. It saves energy

Because it prevents unnecessary flow passage, the pump, boiler and cooling group operate more efficiently.

3. It increases comfort

Especially in HVAC systems, it reduces temperature fluctuation.

4. It provides remote control

It can operate integrated with the building automation system, a room thermostat or a PLC.

5. It reduces human error

It lowers the need for manual intervention.

6. It increases system safety

In certain alarm scenarios, it can bring the valve to a safe position.

7. It provides precise temperature management

Especially in modulating systems, it delivers a much more stable result.

How Do You Select an Electric Actuated Valve?

This is the most critical issue on the purchasing and project side. That is because a wrongly selected valve either reduces the efficiency of the system or causes a failure within a short time. For the right selection, the following criteria must definitely be evaluated.

1. System Type

First, it must be clarified what the system is:

• a fan coil?
• an air handling unit?
• underfloor heating?
• a boiler room?
• a calorifier?
• a process line?
• a treatment system?

Because each system has a different control logic.

2. Valve Type

• 2-way?
• 3-way?
• ball?
• globe?
• butterfly?
• rotary mixing valve?

3. Operating Mode

• on/off?
• modulating?
• 3-point control?

4. Diameter

The line diameter such as DN15, DN20, DN25, DN32, DN40 must be determined correctly. Selecting the diameter based only on the pipe diameter is not correct; the flow rate must also be taken into account.

5. Flow Rate and Kv/Kvs Value

The flow capacity of the valve must match the system flow rate. Selecting too large a valve disrupts control precision. Selecting too small a valve, on the other hand, increases the pressure loss.

6. Pressure and Temperature Values

The PN value, operating temperature and the properties of the fluid must be suitable.

7. Supply Voltage

• 24V AC/DC
• 230V AC

The decision must be made according to the control infrastructure in the field.

8. Torque Value

Especially in butterfly valves and large-diameter applications, the actuator torque is very important.

9. Fail-Safe Requirement

To which position will the valve return when the power is cut off? Some systems require a spring-return actuator.

10. Automation Compatibility

It must be compatible with the BMS, PLC, room thermostat, sensor or controller.

On/Off Valve or Modulating Valve?

This is one of the most frequently asked topics on the purchasing side.

When an on/off valve should be chosen:

• if the load variation is not very sensitive
• in low-budget projects
• in simple fan coil applications
• if only opening and closing is sufficient

When a modulating valve should be chosen:

• if temperature stability is very important
• if energy efficiency is targeted
• if the automation is advanced
• if there is an air handling unit or a sensitive process
• if mixing control is required

In short, as comfort and precision increase, the modulating solution becomes more appropriate.

2-Way or 3-Way?

When is a 2-way valve used?

• if you want to cut off or reduce the flow
• if you are going to control the coil flow rate
• if there is a fan coil or an independent zone line
• if a variable-flow system is used

When is a 3-way valve used?

• if mixing is going to be done
• if a bypass is going to be needed
• if diverting is going to be done
• if temperature stabilization is important
• if there is underfloor heating or a boiler mixing circuit

In the wrong application, choosing a 3-way instead of a 2-way valve, or vice versa, can disrupt the entire system behavior.

The Advantages of the Electric Actuated Valve

The main reason electric actuated valves have become so widespread is the great advantages they provide.

Energy Efficiency

The system passes only as much fluid as needed. This reduces the energy consumption of the pump, boiler, chiller and overall consumption.

Automation Integration

In modern buildings, working integrated with the building automation system is a great advantage.

Lower Operating Cost

A correctly operating valve reduces unnecessary energy consumption and manual intervention.

Increased Comfort

Temperature fluctuations decrease and room-based control becomes possible.

Professional System Management

In large projects, efficient operation is almost impossible without central control.

Long-Term Savings

The initial investment cost may be higher than for a manual valve; however, with energy and operating savings, it usually pays for itself over time.

Why Do Electric Actuated Valve Failures Occur?

This is also one of the topics most researched in search engines. Users generally search for “electric valve not working,” “motorized valve not opening,” “actuator not turning,” “valve stuck.”

The most common causes are as follows:

1. Wrong voltage supply

Supplying 220V instead of 24V, or vice versa, causes a major problem.

2. Faulty wiring

Connecting the control terminals incorrectly prevents the valve from operating.

3. Unsuitable torque selection

If the actuator is not enough to turn the valve, opening and closing problems occur.

4. Limescale and sediment

Especially in systems where the installation water is dirty, the internal mechanism of the valve can seize over time.

5. Wrong diameter selection

Selecting too large or the wrong valve gives rise to control problems.

6. Continuous heavy operation

If the actuator remains under a load above its capacity, its life is shortened.

7. Ambient conditions

Humidity, temperature, water ingress, condensation or external environmental effects can damage the actuator.

8. Automation signal errors

Wrong commands originating from the thermostat, controller or BMS can operate the valve incorrectly.

What Should You Consider When Buying an Electric Actuated Valve?

Proceeding solely on a price basis in the purchasing process can lead to serious mistakes. That is because a cheap but wrongly selected valve can cause an expensive system failure.

Points to consider:

• suitability for the system type
• fluid compatibility
• valve diameter and Kv value
• operating pressure
• maximum temperature
• control type
• supply voltage
• actuator torque
• mounting orientation
• brand reliability
• spare part and service availability
• automation compatibility
• IP protection class

Especially in professional projects, it is not correct to buy a valve without reviewing the product datasheet.

Which Brands of Electric Actuated Valves Are Preferred?

Depending on the project and purpose of use, many brands stand out. Among the brands frequently researched and preferred in the industry are:

• Siemens
• Honeywell
• Resideo
• Belimo
• Danfoss
• ESBE
• Oventrop
• Caleffi

Apart from these, different brands can also be used depending on the project budget and application type. What matters is not just the brand; it is selecting the right product family, the right actuator type and the right valve body.

What Determines the Prices of Electric Actuated Valves?

The topic of price is one of the most curious ones. However, it would not be correct to state a single price here, because there are numerous variables affecting the price.

Main factors affecting the price:

• valve diameter
• valve type
• whether it is 2-way / 3-way
• actuator type
• whether it is on/off or modulating
• voltage type
• torque value
• body material
• operating pressure
• brand
• fail-safe feature
• automation protocol compatibility

In general, modulating and spring-return models are more expensive. Large-diameter butterfly valve actuator systems are also much more costly than small DN15-DN20 products.

Are an Electric Actuated Valve and a Solenoid Valve the Same Thing?

No, they are not the same. These two products are often confused.

Solenoid valve:

• operates with a coil
• performs very fast on/off
• is common in small-diameter and instant control applications
• generally has limited modulation capability

Electric actuated valve:

• has a motorized structure
• moves in a more controlled manner
• can be used in larger diameters
• can offer modulation capability
• is more common in HVAC and building services applications

Therefore, in applications such as fan coil, air handling unit, underfloor heating and boiler line, an electric actuated valve is usually preferred instead of a solenoid.

What Is the Difference Between an Electric Actuated Valve and a Pneumatic Actuated Valve?

In some industrial facilities, pneumatic solutions are also used. The main difference is as follows:

Electric actuated valve:

• operates with electricity
• the automation connection is practical
• is very common in building services
• does not require an air line

Pneumatic actuated valve:

• operates with compressed air
• is very fast and durable in some processes
• requires compressor and air line infrastructure

In mechanical building services, electric solutions are generally more common.

Points to Consider When Installing an Electric Actuated Valve

Just as important as choosing the right product is the right installation.

Points to consider during installation:

• the flow direction must be correct
• the arrow on the valve body must be taken into account
• installation must not be carried out without flushing the system
• the use of a filter must not be neglected
• the actuator cable connection must be made according to the diagram
• the ambient temperature and humidity conditions must be checked
• the valve must be placed at an accessible point
• space for service and maintenance must be left
• horizontal/vertical mounting limitations must be checked according to the datasheet

Especially in installations with sediment, not using a strainer can lead to a valve failure very quickly.

How Is an Electric Actuated Valve Maintained?

These products are not completely maintenance-free. Especially in commercial facilities, periodic inspection is recommended.

Maintenance recommendations:

• the electrical connections must be checked
• it must be examined whether the actuator body has taken on moisture
• an on/off test of the valve must be carried out
• tightness must be checked
• the automation feedback signal must be verified
• the pollution level of the installation water must be observed
• the filters must be cleaned
• unusual noise or heating must be monitored

Regular maintenance both extends the valve's life and reduces the risk of a sudden installation shutdown.

For Which Users Is an Electric Actuated Valve the Right Choice?

These products are especially suitable for the following user groups:

• mechanical building services companies
• designers
• contracting companies
• facility management companies
• hotels
• shopping malls
• hospitals
• factories
• water treatment system installers
• industrial automation companies
• heating-cooling system suppliers

If the fluid control in your system needs to be done automatically rather than manually, an electric actuated valve is most likely the right solution for you.

Why Is the Right Electric Actuated Valve Critical in Terms of Sales and Performance?

Many buyers initially think only “as long as there is a valve.” Yet this product directly affects the system performance. When the wrong valve is selected:

• room comfort is disrupted
• the pump runs unnecessarily
• energy consumption increases
• temperature fluctuation occurs
• equipment operates inefficiently
• maintenance cost rises
• user satisfaction drops

When the right valve is selected, on the other hand:

• the system operates more stably
• energy savings increase
• the automation becomes more efficient
• user complaints decrease
• the return on investment accelerates

For this reason, the electric actuated valve is a strategic piece of equipment that looks small but affects the entire system.

What Do You Gain When Buying an Electric Actuated Valve from POMEKA?

Selecting an electric actuated valve is not just about looking at a product in a catalog and placing an order, because every application has a different need. At POMEKA, what matters here is not just product sales but the approach of matching the right product to the right application.

The needs that stand out in professional supply are:

• the right diameter selection
• the right valve type
• the right control signal
• a suitable brand alternative
• price/performance balance
• fast delivery
• technical support
• guidance appropriate to the project

Especially for fan coil valves, 2-way motorized valves, 3-way mixing valves, electric control valves, rotary valves and actuated valve solutions suitable for HVAC automation, the right product selection is of critical importance.

Frequently Asked Questions

What is an electric actuated valve?

It is a valve system that operates with the help of an electric motor and controls the fluid automatically.

Are a motorized valve and an electric actuated valve the same?

In the industry, they are mostly used to mean the same thing. There may be a difference in technical detail depending on the product structure, but in practice they are similar concepts.

Where is an electric actuated valve used?

It is used in fan coil, air handling unit, underfloor heating, boiler room, calorifier, chiller, heat pump, industrial process and treatment systems.

What is the difference between a 2-way and a 3-way valve?

A 2-way valve opens, closes or throttles the flow. A 3-way valve, on the other hand, mixes or diverts.

Which is better, on/off or modulating?

It depends on the need of the system. In simple applications, on/off is sufficient; where precise control and energy efficiency are required, a modulating valve is better.

Which valve is used for a fan coil?

In most fan coil applications, a 2-way electric actuated valve is used. Depending on the project, 3-way options may also be available.

Why does an electric valve fail?

Wrong voltage, faulty wiring, dirty installation, insufficient torque, installation error and automation problems are the most common causes.

Conclusion

The electric actuated valve is one of the indispensable products of modern mechanical building services and automation systems. It is not just a valve; it is a piece of equipment that directly affects the efficiency, comfort, energy consumption and control capability of the system. From the fan coil to the air handling unit, from underfloor heating to the boiler room, from the heat pump to industrial processes, it has a very wide range of use.

For the right product selection, not only diameter and price but also the system type, flow rate, pressure, control logic, actuator type, automation compatibility and application purpose must be evaluated together. In particular, questions such as 2-way valve or 3-way valve, on/off or modulating, ball or globe, 24V or 230V must be answered professionally.

If you too are looking for the right electric actuated valve, motorized valve, 2-way valve, 3-way valve, fan coil valve or HVAC control valve for your project, building, mechanical installation or industrial application, then selecting the right product group by carrying out a needs analysis will, in the long term, bring you