What Are Motorized Valves?

Motorized Valves are valve assemblies equipped with electric actuators that automatically open, close or modulate fluid flow.

They are used to maintain stable temperature, flow and pressure control in mechanical systems. The valve position is adjusted according to signals from a building automation system, room thermostat, sensor or control panel.

How Do Motorized Valves Work?

The electric actuator generates stem or disc movement according to the control signal. As a result, the valve opening changes and regulates the amount of fluid passing through the piping system.

Depending on system requirements, operation can be on/off, three-point or modulating. Thus, hot water, chilled water or process-fluid flow can be automatically adjusted.

Applications of Motorized Valves

• Heating and cooling systems
• Boiler rooms and hot-water systems
• Chiller and chilled-water circuits
• Air-handling-unit coil circuits
• Fan-coil systems
• Heat-pump applications
• Industrial process-water lines
• Mechanical systems requiring pressure and flow control
• Automation-controlled HVAC systems
• Energy-efficient building management systems

Advantages of Motorized Valves

• Automate fluid-flow control.
• Support energy efficiency in heating and cooling systems.
• Provide precise temperature, flow and pressure regulation.
• Can be integrated with building automation systems.
• Reduce the need for manual intervention.
• Improve system comfort and operating stability.
• Can be adapted with different valve bodies, connections and actuator options.

Product Groups

• Motorized control valves: Used in automation systems for flow and temperature control.
• Dynamic balancing valves: Support hydraulic balancing in variable-flow systems.
• Static balancing valves: Used for fixed-flow adjustment and hydraulic balancing of circuits.
• Strainers / Y-strainers: Help prevent particles and debris from damaging system equipment.
• Butterfly valves: Used for shut-off and flow control in larger-diameter pipelines.
• Wafer butterfly valves: Preferred for compact installation between flanges.
• Flanged butterfly valves: Used in high-flow and large-diameter piping systems.
• 2-way motorized valves: Provide on/off or modulating control of fluid flow.
• 3-way motorized valves: Used for mixing or diverting applications.
• Threaded and flanged valves: Selected according to pipe size, pressure class and installation conditions.

Control Types

• On/off control: The valve operates in fully open or fully closed positions.
• Three-point control: Provides stepped control using open, close and stop commands.
• Modulating control: Provides precise valve positioning using 0-10 V, 2-10 V or 4-20 mA signals.
• Spring-return actuator: Returns the valve to a defined fail-safe position when power is lost.
• Building automation integration: Can operate with HVAC control panels and BMS platforms.

Technical Design Criteria

• Valve size and connection type
• 2-way or 3-way valve requirement
• Fluid type and operating temperature
• Flow rate and pressure drop
• Kvs / Cv valve coefficient
• Operating pressure and pressure class
• Actuator supply voltage
• Control signal and automation compatibility
• Body, stem, seal and disc materials
• Installation position, service access and maintenance requirements

Motorized Valve Selection Criteria

When selecting Motorized Valves, valve diameter, Kvs value, operating pressure, fluid temperature, connection type, control signal, actuator torque, power supply and automation system should be evaluated together.

An incorrectly selected valve can cause inadequate flow control, excessive pressure drop, noise, unstable temperature regulation, actuator overload and reduced system efficiency. Therefore, selection should be based on actual operating data. Technical resources published by ASHRAE can also support HVAC control-system evaluation.

Use in Heating and Cooling Systems

In heating systems, motorized valves regulate the delivery of hot water to radiators, fan coils, air-handling units or process circuits.

In cooling systems, they control chilled-water flow from the chiller circuit. Consequently, they help stabilize room temperature and reduce unnecessary energy consumption.

Balancing and Flow Control

Dynamic and static balancing valves help establish hydraulic balance in mechanical systems. Correct flow adjustment directly affects system performance and comfort conditions.

Especially in variable-flow HVAC systems, correct valve and balancing-equipment selection can reduce pump-energy consumption while supporting stable system operation.

Butterfly Valve and Strainer Applications

Butterfly valves are commonly selected for larger pipelines because of their compact construction and limited installation-space requirement. Wafer or flanged connection options can be selected according to project conditions.

Strainers, meanwhile, help prevent sediment, welding debris and other particles from damaging valves, pumps, heat exchangers and automation equipment.

Airtes Motorized Valve Solutions

Airtes provides project-based technical selection and application support for Motorized Valves used in heating, cooling, chiller, boiler-room, fan-coil, air-handling-unit, process-water and building-automation applications.

During system evaluation, valve diameter, fluid flow rate, pressure drop, connection type, control signal, actuator torque, body material and site installation conditions are considered together. Thus, an efficient and durable valve solution can be developed for each project.

Why Airtes?

• Project-specific motorized valve and control-valve selection
• Technical evaluation based on flow rate, pressure drop and Kvs values
• Experience in heating, cooling, HVAC and industrial mechanical systems
• Actuator selection compatible with automation systems
• Balancing valves, butterfly valves, strainers and auxiliary equipment solutions
• Technical support suitable for site installation conditions

Frequently Asked Questions

What are motorized valves?

Motorized valves are automatic valves that use electric actuators to provide on/off or modulating fluid-flow control.

Where are motorized valves used?

They are used in heating, cooling, chiller, boiler-room, air-handling-unit, fan-coil, process-water and automation-controlled mechanical systems.

What is the difference between 2-way and 3-way motorized valves?

A 2-way motorized valve controls flow through one path. A 3-way motorized valve is used for mixing or diverting flow between circuits.

How are motorized valves selected?

Selection should consider flow rate, Kvs value, pressure drop, operating temperature, connection type, control signal, actuator torque and automation compatibility.

Contact Airtes for Motorized Valves Suitable for Your Project

Selecting Motorized Valves requires accurate analysis of fluid type, flow rate, pressure drop, valve diameter, connection type, control signal, actuator torque, automation infrastructure and site conditions. Therefore, the Airtes technical team provides professional support for determining the appropriate solution.

Contact us for detailed information, site surveys and project-specific quotations.