What Is An Electric Control Valve?

Building owners struggle with high energy bills and poor flow control in their systems. These issues lead to wasted resources and unhappy tenants. I’ve seen firsthand how electric control valves can solve these problems.

An electric control valve combines an electric actuator with a valve body to regulate fluid flow. It responds to control signals to adjust flow rates automatically. These valves help buildings save energy and maintain precise control of heating and cooling systems.

Electric Control Valve Basic Structure

I want to share my experience with electric control valves. I’ll explain their types, functions, and how they can benefit your building systems.

How Does An Electric Valve Work?

Last month, I helped a client who couldn’t control temperatures in different building zones. Their manual valves made adjustments slow and inefficient. Electric valves solved their problem by providing precise, automated control.

Electric valves use an actuator that converts electrical signals into mechanical movement. When the control system sends a signal, the actuator moves the valve stem. This movement changes the valve opening to control flow rate, pressure, or temperature.

Understanding Electric Valve Operation

The operation of an electric valve involves these key components:

1. Electric Actuator¹
2. Control System²
3. Valve Body
4. Position Feedback

Here’s a detailed breakdown of the operation process:

I’ve installed many electric valves in heating systems. The actuator receives signals from temperature sensors or building management systems. When room temperature drops, the system sends a signal. The actuator responds by opening the valve. This lets more hot water flow through the heating system. The valve moves smoothly and precisely. It maintains exact flow rates needed for comfort.

The beauty of this system is its accuracy. Manual valves often lead to overheating or cold spots. But electric valves adjust in small increments. They can maintain steady temperatures within 1 degree. This precise control saves energy and improves comfort.

What Is The Electronic Valve Called?

Many customers ask me about names for electronic valves. The terminology can be confusing. But I help them understand the different types and their proper names.

Electronic valves go by several names: motorized valves³, actuated valves, or power-operated valves. These names all refer to valves that use electrical power to operate. The specific name often relates to its application or control method.

Common Electronic Valve

Common Names and Their Meanings

I find it helpful to organize valve names by their features:

When I talk with building managers, they often use different names for the same valve. A maintenance worker might call it a “motorized valve.” An engineer might say “electric control valve.” Both mean the same thing – a valve that uses electricity to control flow.

The name choice often depends on the application. In a simple heating system, “motorized valve” is common. But in complex building automation, we use “smart valve” or “electric control valve.” These names indicate more advanced features like digital control or feedback sensors.

What Are The Three Types Of Control Valves?

During system designs, I often explain valve types to clients. Each type has specific benefits. Understanding these differences helps choose the right valve for each application.

The three main types of control valves are: Linear motion valves⁴ (like globe valves), Rotary motion valves (like butterfly valves), and Self-operated valves (like pressure regulators). Each type serves different flow control needs.

Detailed Comparison of Valve Types

Here’s how I categorize the main valve types:

Linear motion valves move straight up and down. I use these when precise control is essential. They work well in heating systems where small adjustments matter. The linear movement provides excellent throttling control. These valves can handle high pressures and temperatures.

Rotary motion valves turn 90 degrees to open or close. I install these in large pipes where space is limited. They’re simpler than linear valves. The ball or butterfly disc rotates to control flow. These valves cost less and need less maintenance. But they might not control flow as precisely as linear valves.

Self-operated valves work without external power. They use system pressure to operate. I recommend these for basic pressure control. They maintain set pressures automatically. These valves are reliable and simple. But they can’t integrate with building automation systems.

What Is The Most Common Control Valve?

In my 15 years of valve installation, I’ve seen trends change. But some valve types remain popular. Their reliability and versatility make them common choices.

Globe valves⁵ and ball valves are the most common control valves. Globe valves excel at precise control. Ball valves offer reliable shutoff. These qualities make them popular in HVAC and water systems.

Common Control Valve Applications

Analysis of Popular Valve Types

I break down valve popularity based on these factors:

Globe valves remain popular in control applications. I use them in systems needing precise flow adjustment. Their design allows for accurate control. The stem moves up and down to regulate flow. This makes them ideal for variable flow systems.

Ball valves dominate simple on-off applications. I install these when cost matters more than precise control. Their quarter-turn operation is simple and reliable. They seal well and last long. Many building owners prefer ball valves for isolation points.

Both types serve different needs. Globe valves suit control loops in heating systems. Ball valves work well for system isolation. I often use both types in the same building. This gives the best combination of control and reliability.

Conclusion

Electric control valves are essential for modern building systems. They provide precise control, save energy, and improve comfort. I recommend them for any serious building automation project.