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Motor Valve

Motor-operated valves make controlling fluid and gas in industrial systems easy and efficient. They’re great for handling large, remote, or automated operations, thanks to electric actuators that replace manual effort. Commonly used in oil pipelines and water treatment, they’re a practical solution for modern, automated flow systems.

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At KUHNWAY, we take pride in our QUEEN series and JS series motor valves. We offer customization options, such as integrating butterfly valves, 3-way ball valves, and threaded or flanged ball valves, to meet your diverse needs. Our motor valves are trusted across industries like HVAC, water treatment systems, municipal water plants, and environmental management, showcasing their adaptability and wide-ranging applications.

Types of Motor-Operated Valves We Offer

  • Queen series

The QUEEN motor valves feature two models: MK3 and MK7, designed to meet various application needs.

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The MK3 model includes a spring-return electric actuator, storing energy during normal operation to ensure safe positioning (fully open or closed) during a power outage. It supports threaded connections for sizes 1/2" to 2".

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The MK7 model is an On/Off type, offering flange connections for sizes 1" to 3" and threaded connections for sizes 1/2" to 2". These versatile options make the QUEEN series ideal for diverse pipeline systems.

  • JS Series

The JS series motor valves pair JS series electric actuators with valve bodies available in a range of materials and sizes. These valves deliver exceptional control precision and versatile functionality, making them ideal for meeting the diverse requirements of industrial pipeline systems.

How to Place an Order for Our Motor Valve Products

To place an order for KUHNWAY valve products, follow these simple steps:

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  1. Inquire: Visit our Contact Us page or send us an email to inquire about the product specifications, availability, and pricing.

  2. Place Your Order: Once you confirm the details, submit your order via email or through our designated communication channels.

  3. Make Payment: Transfer the payment to the specified account provided in our order confirmation. Ensure all payment details are accurate to avoid delays.

  4. Shipping Arrangements: After confirming the payment, we will discuss and finalize the shipping method with you. Choose between sea freight or air freight based on your preferences and requirements.

  5. Delivery: Once all arrangements are complete, we will ship your order promptly and provide you with the necessary tracking information.
     

For further assistance, feel free to reach out to us anytime. We are committed to ensuring a smooth and efficient ordering experience.

What is a Motor Valve?

A motor valve is a specialized valve equipped with an electric motor, allowing for automated control of fluid flow in pipelines or systems. These valves are widely used in various industries such as oil and gas, water treatment, and power generation, where precise flow regulation and automation are crucial. The term "Motor-Operated Valve" (MOV) is often used synonymously, though it typically refers to more technical applications in industrial environments.

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Their key features include automated operation, which eliminates the need for manual adjustments, and precise control over the flow of liquids or gases. Also, these valves enable remote operation, enhancing safety in hazardous conditions, and are built for durability to handle high-pressure or high-temperature environments. These qualities make motor valves indispensable for systems requiring frequent adjustments and are integral to modern automated processes.

  • Parts of a Motor Valve

Motor valves consist of three primary components: the valve body, the actuator, and the motor. Each part plays a critical role in the valve's operation, ensuring efficient and precise control of fluid flow.

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The valve body is the main structure of the valve, designed to manage the flow of fluids or gases. It is typically made of durable materials such as metal (e.g., stainless steel, brass, or cast iron) or high-strength plastics, chosen based on the fluid type and operating conditions. The valve body houses the flow control mechanism, such as a gate, ball, or disc, and connects directly to the pipeline.

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The actuator is responsible for controlling the valve's movement—opening, closing, or modulating its position. It is connected to the valve body through a stem or shaft, which transfers motion to the flow control mechanism. The actuator ensures smooth operation and accurate positioning of the valve, making it essential for automated systems.

 

The motor powers the actuator and generates the energy required to operate the valve. It is typically connected to the actuator through a gear system or belt, enabling the transfer of power. Most motors are equipped with a gearbox to amplify torque, ensuring the motor can overcome the resistance of the valve and handle demanding operating conditions. This is particularly important for large or high-pressure valves, where significant force is needed.

How to Choose the Right Motor Valve?

Selecting the right motor valve is crucial for the efficiency and safety of any system involving fluid or gas flow. There are several factors to consider to ensure the motor-operated valve actuator meets your specific needs. Let's take a look at the key considerations to help you make an informed decision.

  • Working Environment

Understanding your system's working conditions is the first step. Start with the pressure and temperature the valve will need to handle. High-pressure systems require valves tough enough to withstand the force, while extreme temperatures mean the valve materials must resist damage and stay reliable during operation.

 

Next, think about the flow rate and pipe size to ensure the valve can manage the amount of fluid or gas moving through the system. Normally, the nominal diameter of the valve should match the pipeline. In cases where flow needs to be restricted or adjusted, a smaller-sized valve may be the better choice.

  • Media Type

The type of media—whether it's air, water, steam, oil, or another substance—plays a significant role in valve selection. Different media can have corrosive properties or require specific sealing materials. For instance, valves used for steam need to withstand high temperatures and pressure, while those for oil might need special seals to prevent leaks. For high-viscosity media like heavy oil or mud, a larger valve size is recommended to prevent clogging and a design for easy maintenance will be needed.

  • Valve Materials

The material of the valve affects its durability and compatibility with the media. Common materials include brass, bronze, and stainless steel. Brass and bronze are suitable for general purposes and offer good corrosion resistance, making them ideal for water and air. Stainless steel is more robust and resistant to a wider range of chemicals and temperatures, making it suitable for aggressive media like acids or high-temperature steam.

  • Actuator Types

When choosing a motor-operated valve actuator for your valve, there are a few key factors to consider. First, think about the control mode you need. On/off actuators are great for simple open-close operations, while modulating actuators work best for applications requiring precise flow control, like hydronic heating systems.

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Next, consider the torque and thrust requirements based on the valve’s type and size. The actuator must provide enough force to handle the system’s pressure and flow conditions. Lastly, think about speed. Some applications, like emergency shut-off systems, need fast valve movement, while others benefit from slower, more controlled adjustments for smoother operation.

  • Electrical Requirements

Consider the electrical specifications of your system. This includes the voltage and current requirements for the motor-operated valve actuator. Ensure that the actuator is compatible with your power supply—whether it's AC or DC, and the correct voltage level (e.g., 24V, 110V, 220V).

How Does a Motor Valve Work?

A motor-operated valve uses an electric motor to automate the flow control of liquids or gases. When activated, the motor drives an actuator, which converts the motor's rotational motion into the movement required to open, close, or adjust the valve. For rotary valves like ball or butterfly valves, the actuator spins the valve; for linear valves like gate valves, it moves the valve stem up or down.

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The motor doesn’t work alone—it usually has a gearbox to make sure it produces the right amount of force, or torque, to move the valve smoothly. This is especially important for large valves or those handling high-pressure fluids, as they can be difficult to move without extra help.

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Also, MOVs can be configured to operate in either a fail-safe or fail-close mode. In fail-safe mode, the valve automatically closes in the event of a power failure, ensuring the system is secured. In fail-close mode, the valve remains in its current position during a power outage, maintaining the system's last state.

Different Types of Motor Valves: Controlling Methods

Motor valves can be classified based on how they control flow. These include open/close valves, inching valves, and precision flow valves, each tailored to specific operational needs.

  • Open/Close Valves

Open/close valves, also known as on/off valves, are designed to fully open or close fluid flow with no intermediate positions. These valves are simple, reliable, and widely used in systems requiring complete isolation or unrestricted flow, such as water pipelines and emergency shutoff systems. Their binary operation is powered by an electric motor, ensuring quick and efficient performance.

  • Modulating Valves

Modulating valves, also known as control valves, are designed to adjust fluid flow to any position between fully open and fully closed, allowing for precise regulation of flow rates. They respond to varying control signals, such as 4-20 mA or 0-10 V, to modulate the valve position accordingly. This capability makes them ideal for applications requiring fine-tuned control, such as in power plants, HVAC systems, and irrigation systems. By continuously adjusting the valve position, modulating valves help maintain desired process parameters like temperature, pressure, or fluid levels, enhancing system efficiency and stability.

  • Inching Valves

Inching valves allow partial opening or closing to achieve a desired flow rate. By enabling gradual adjustments, these valves provide better control over fluid movement compared to on/off valves. They are ideal for applications that require moderate precision, such as irrigation systems or tank-filling processes. Electric actuators provide the precise positioning needed for inching operations.

  • Precision Flow Valves

Precision flow valves are designed for highly accurate flow control, making them ideal for industries like pharmaceuticals, food processing, or chemical manufacturing. They use advanced actuators and control systems to adjust the valve position with great precision. These valves ensure consistent flow rates, even under varying pressure conditions, enhancing product quality and system efficiency.

Different Types of Motor Valves: Body Shapes

The valve body is another common criterion for classifying motor valves. Below are some of the most common motor valves categorized by their body types:

  • Ball Valves: Feature a rotating ball with a hole through its center, allowing precise flow control. They provide tight sealing, are ideal for on/off applications, and are commonly used in water systems and chemical industries.

  • Butterfly Valves: Utilize a disc that rotates within the valve body to regulate flow. Lightweight and compact, they are suitable for large-diameter pipelines in industries like HVAC, water treatment, and power generation.

  • Gate Valves: Use a sliding gate to block or allow fluid flow. They are designed for full open or full close operations, making them suitable for systems requiring minimal flow resistance, such as oil and gas pipelines.

  • Globe Valves: Feature a linear motion mechanism with a disc that moves perpendicular to the flow. Known for precise throttling capabilities, they are used in applications requiring flow regulation, such as in steam systems or cooling water circuits.

  • 3-Way Ball Valves: Feature a rotating ball with three ports, allowing fluid to be directed between different flow paths. They come in L-shaped and T-shaped configurations—L-shape controls two flow paths, while T-shape enables mixing or diverting between all three. Commonly used in HVAC, chemical processing, and water treatment, they offer flexibility, tight sealing, and efficient multi-directional flow control.

Different Types of Motor Valves: Open Mode

Motor valves can also be classified based on their opening and closing operating mechanisms. Below are the five main types, each offering unique features to suit various applications:

 

  • Quarter-Turn Valves: Require a 90-degree turn to fully open or close. These are compact and fast-acting, making them ideal for ball or butterfly valves used in applications like water systems or industrial processes.

  • Multi-Turn Valves: Operate by rotating the valve stem multiple times to open or close. Commonly used in gate or globe valves, they are suited for applications requiring precise control over large flow volumes.

  • Linear Valves: Move the valve stem in a straight line to regulate flow. Typically found in diaphragm or pinch valves, they are used in applications requiring tight flow control, such as in the chemical or pharmaceutical industries.

  • Electric Valves: Powered by electric motors, these valves offer reliable automation and are widely used in systems requiring remote operation and integration with control systems, such as HVAC or industrial pipelines.

  • Smart Valves: Equipped with sensors and advanced controls, smart valves provide real-time monitoring and precise adjustments. They are ideal for modern, automated systems requiring high efficiency, such as water treatment or energy management setups.

 

Check out our guide to learn about more types of valves.

Air Operated Valve vs. Motor Operated Valve

Air-operated valves and motor valves are both automated options that eliminate manual control, but they differ in how they operate and perform in various scenarios.

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An air-operated valve (AOV), or pneumatic valve, uses compressed air to control the flow of fluids or gases. When air pressure is applied, a piston or diaphragm moves, causing the valve to open or close rapidly. This makes AOVs ideal for applications requiring quick response times and frequent cycling.

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In contrast, a motor-operated valve uses an electric motor to drive its actuator, providing precise control over the valve's position. While MOVs are better suited for applications where electricity is accessible and precise modulation is critical, they are typically larger, heavier, and more expensive than AOVs. Moreover, MOVs may have slower response times compared to the rapid actuation of AOVs.

Advantages of Motor Valves

Motor valves bring huge advantages to industrial and commercial systems by making processes more efficient, safer, and easier to control. Let’s break down why they’re so beneficial:

  • Efficiency

Motor valves eliminate the need for manual adjustments, saving time and labor, especially in large or complex systems. Their ability to operate automatically and work in hard-to-reach areas reduces the workload on operators and maintenance teams, ensuring processes run smoothly without interruptions.

  • Precision

These valves are perfect for applications requiring more than just "on" or "off" control. With electric actuators, motor valves allow fine-tuning of flow rates, which is critical in industries like food processing where consistent quality and accuracy are essential.

  • Safety

In hazardous environments, motor valves enable remote operation, keeping operators safe from dangerous conditions like high-pressure pipelines or chemical exposure. Moreover, their fail-safe modes ensure the system remains secure during power outages by automatically closing or holding the valve in position.

Applications of Motor Valve

Motor valves are essential in industries that require precise, automated control of fluid or gas flow. They are highly versatile and play a crucial role in systems like water management, cooling, steam heating, fire suppression, and beyond. Let’s explore some of the key fields where motor valves prove their value.

  • Power Plants

Motor valves are used to control the flow of steam, water, coolant, and other fluids in power plants. Their automation and precision ensure the efficient operation of turbines and cooling systems. Fail-safe features enhance safety in high-pressure environments, while remote operation minimizes risks and enables better system management in critical energy production processes.

  • HVAC Systems

Motor valves regulate the flow of water or air in heating, ventilation, and air conditioning (HVAC) systems for industrial, residential, and commercial settings. They provide precise control over temperature and airflow, ensuring energy efficiency and a consistent indoor climate. Their ability to integrate with automation systems makes them a reliable choice for dynamic HVAC requirements, reducing energy waste and improving system performance.

  • Water Treatment

Motor valves are essential in water treatment plants for managing wastewater, and controlling the flow of water and chemicals during purification. By maintaining water quality and preventing contamination, these valves are integral to the efficiency and reliability of water treatment processes.

  • Pharmaceuticals

Motor valves are widely used in pharmaceutical manufacturing for precise control of fluids during production. Their ability to provide consistent flow and meet strict hygiene standards makes them ideal for critical applications like mixing, filtration, and sterilization. Their precision and reliability are essential for maintaining product quality in regulated industries.

  • Mining

In mining operations, motor valves are used to handle the flow of water, slurry, and chemicals. Their sturdy design and resilience in tough conditions make them highly dependable. Automation and fail-safe features ensure efficient fluid management, even in remote or high-risk environments, enhancing safety and operational efficiency.

  • Automation

In industrial automation, motor valves play a key role in regulating fluid flow across various processes. Their integration with control systems ensures seamless operation, real-time adjustments, and improved efficiency. Their durability and reliability make them a preferred choice for industries that require continuous, high-performance operations with minimal downtime.

  • Chemical Processing

Motor valves play a vital role in chemical processing by controlling the flow of reactive and corrosive substances. Their tight sealing capabilities prevent leaks, ensuring safety and efficiency. Precision control allows accurate dosing and mixing of chemicals, while robust materials and automation features make them reliable in harsh and hazardous environments.

Kuhnway - the Motor-Operated Valve Manufacturer Redefining Excellence

Motor valves are critical components in modern industrial systems, offering precision, automation, and efficiency across various applications. At KUHNWAY, we take pride in delivering top-tier motor valve solutions designed to meet diverse industry demands.

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Our QUEEN series motor valves include the versatile MK3 and MK7 models. The MK3 features a spring-return actuator for safe operation during power outages, while the MK7 provides reliable On/Off functionality with flange or threaded connection options. These models excel in industries like HVAC, water treatment, and fire protection.

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The JS series motor valves combine precision electric actuators with durable valve bodies in various materials and sizes, ensuring reliable performance for industrial pipelines and complex systems.

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With over 30 years of expertise, KUHNWAY offers advanced technology, dependable quality, and dedicated technical support. Join the growing community of satisfied customers and elevate your system’s efficiency and value. Contact us today to discover how KUHNWAY’s products can meet and exceed your expectations!

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