What Are Electric Ball Valves?
Electric ball valves are automated flow control devices that combine a traditional ball valve body with an electric actuator. The actuator provides remote control capability, allowing the valve to open or close with a simple electrical signal. This eliminates the need for manual operation and enables integration into building management systems (BMS), SCADA systems, and industrial process controls.
Our electric ball valves are engineered for reliability in demanding applications, featuring sealed designs, multiple control options, and construction materials that withstand aggressive fluid conditions.
How Electric Ball Valves Work
An electric ball valve consists of a ball with a port (opening) that rotates within the valve body. When the electric actuator receives a signal, it rotates the ball 90 degrees to either allow or block fluid flow:
- On-Off Operation: The valve rapidly switches between fully open and fully closed states. Ideal for applications requiring simple start/stop control.
- Modulating Operation: The actuator positions the ball at any point between fully open and closed, enabling proportional flow control. Commonly used in temperature regulation and pressure balancing.
- Failsafe Positions: Many models include spring-return mechanisms that move the valve to a safe default position (open or closed) if power is lost.
- Control Signals: Actuators accept 24V DC, 230V AC, 3-10V analogue signals, or pulse-width modulation (PWM) signals depending on the model.
Types of Electric Ball Valves
By Port Configuration
2-Way Ball Valves
Single inlet and outlet port. Used for on-off control in water, heating, and cooling systems. Ideal for simple start/stop applications and zone control in HVAC installations.
3-Way Ball Valves
Three ports enabling diverting or mixing functions. Diverting valves direct flow to one of two outlets. Mixing valves combine two inlet streams into one outlet. Essential for temperature blending in heating systems and process flow routing.
By Bore Size Classification
Full Bore Ball Valves
The ball bore matches the pipeline diameter, providing maximum flow rate and minimal pressure drop. Preferred for applications requiring low resistance and high flow capacity.
Reduced Bore Ball Valves
The ball bore is smaller than the pipe diameter, reducing costs and weight while accepting minor pressure drop. Suitable for applications where flow restriction is acceptable.
Materials & Construction
We supply electric ball valves in materials selected for specific fluid types and environmental conditions:
Brass
Cost-effective choice for water systems, heating, and general industrial applications. Brass offers excellent corrosion resistance to potable water and is suitable for pressures up to 25 bar. Typical working temperature range -10°C to 60°C.
Stainless Steel 316
Premium material for corrosive environments, seawater applications, and chemical process work. Stainless steel 316 provides superior resistance to chlorides and offers higher temperature ratings (up to 100°C). Ideal for marine installations and high-purity applications.
Carbon Steel
Engineered for high-pressure steam and oil applications. Carbon steel handles pressures exceeding 40 bar and temperatures up to 150°C, making it suitable for power generation and industrial process systems.
PVC & PPVC
Excellent for chemical handling and corrosive fluid applications. Plastic materials are lightweight and cost-effective for low-pressure systems (typically up to 10 bar) and chemical plants where metal corrosion would be problematic.
Bronze
Specialised material for specific industrial applications, offering unique properties between brass and stainless steel. Bronze provides excellent machining characteristics and is selected for demanding custom applications.
Available Sizes
Our electric ball valve range covers the full spectrum of industrial pipe sizes:
Key Features & Certifications
Standard Features
- On-Off Control: Rapid valve switching for binary control applications
- Modulating Control: Proportional positioning for precise flow regulation and temperature control
- Failsafe Options: Spring-return designs that move to open or closed position on power loss
- Position Feedback: Electrical feedback indicating valve position for system diagnostics and automation
- Low Torque Design: Reduced actuator power requirements for energy efficiency
- Sealed Ball & Stem: Prevents external leakage and contamination
- Teflon Seals: Extended service life in corrosive and high-temperature applications
- Integral Filters: Optional strainer elements protect downstream components
Certifications & Standards
- ATEX Certified: Zone 1, Zone 2 approval for use in explosive atmospheres (gas and dust)
- CE Marked: Full compliance with European machinery and low-voltage directives
- ISO 9001 & 14001: Manufactured under certified quality and environmental management systems
- EN 12098: Building controls system compatibility and integration standards
- BS 21087: Safety requirements for process control systems
Typical Specifications
| Parameter | Standard Range | Notes |
|---|---|---|
| Pipe Sizes | 1/2" to 12" (DN15-DN300) | Thread, socket, or flanged end connections |
| Pressure Rating | 10 - 40 bar (standard) | Material and size dependent; higher ratings available |
| Temperature Range | -10°C to +100°C (standard) | Material dependent; up to 150°C for carbon steel |
| Operating Voltage | 24V DC / 230V AC | Other voltages available on request |
| Actuation Time | 15 - 120 seconds | Depending on actuator size and valve type |
| Control Modes | On-Off, Modulating, Failsafe Spring Return | Selectable based on application requirements |
| Position Feedback | Optional 3-10V or 4-20mA feedback | Integrated potentiometer or magnetic sensor |
| Fluid Compatibility | Water, glycol mixes, light oils, some chemicals | Material selection determines compatibility |
| Maximum Flow (DN50) | 30 - 50 m³/h | Full bore; reduced bore restricts flow |
| Body Connection | Thread, Socket, or Flange | Standard and NPT thread options available |
Applications
Electric ball valves are essential components in a wide range of industrial and commercial systems:
HVAC Systems
Zone control, mixing loops, heating and cooling distribution. Modulating valves provide precise temperature regulation in building management systems.
District Heating Networks
Flow balancing and isolation in large-scale thermal distribution systems. ATEX options available for hazardous installations.
Industrial Process Control
On-off and proportional control in manufacturing processes. Stainless steel and carbon steel options for corrosive and high-temperature environments.
Water Treatment Plants
Chemical dosing, flow routing, and system isolation. Reliable operation in demanding municipal and industrial water treatment.
Oil & Gas Applications
High-pressure isolation and control in upstream and downstream operations. Carbon steel and specialty materials for demanding conditions.
Renewable Energy Systems
Solar thermal systems, geothermal loops, and heat pump installations. Precision control for efficient energy utilisation.
Marine & Offshore
Stainless steel 316 construction for seawater and saltwater environments. Proven reliability in challenging marine applications.
Food & Beverage Processing
Hygienic materials and designs for food-safe applications. Precise temperature and flow control in manufacturing processes.
Electric Ball Valve Buying Guide
How to Choose the Right Electric Ball Valve
Selecting the correct electric ball valve for your application requires careful consideration of several factors:
1. Determine Your Valve Function
Identify whether you need on-off (binary) control or modulating (proportional) control. On-off valves are simpler and more cost-effective for applications like zone isolation in HVAC systems. Modulating valves provide precise flow adjustment for temperature and pressure blending applications. Consider your system's control requirements and whether you need position feedback for verification.
2. Select the Appropriate Valve Type
Choose between 2-way and 3-way configurations based on your piping arrangement. Two-way valves block or allow flow in a single line. Three-way valves either divert flow between two outlets (diverting configuration) or combine two inlet streams (mixing configuration). Three-way mixing valves are common in heating systems where hot and cold water are blended to achieve a setpoint temperature.
3. Consider Your Fluid Type
The fluid being controlled (water, glycol, oil, or chemicals) determines the appropriate valve material. For potable water systems, brass or stainless steel provides excellent corrosion resistance. For aggressive chemical applications, stainless steel 316 or PVC should be specified. High-temperature steam requires carbon steel construction. Each material offers different pressure and temperature ratings suited to specific applications.
4. Confirm Pressure and Temperature Ratings
Verify that your selected valve's rated pressure and maximum operating temperature exceed your system requirements. Typical water systems operate at 3-10 bar; industrial systems may reach 25-40 bar. Most standard electric ball valves handle -10°C to +100°C; extreme temperatures require specialist materials. Always allow safety margin above your maximum expected operating conditions.
5. Check Pipe Size and Connection Type
Measure your pipeline diameter and identify the available connection method (threaded, socket, or flanged). Standard thread sizes follow Imperial (1/2", 3/4", 1") or metric (DN15, DN20, DN25) conventions. Some applications require NPT (National Pipe Thread) rather than BSP. Verify that the valve's end connections match your piping configuration to avoid expensive adapters.
6. Specify Actuator and Control Requirements
Select the appropriate actuator voltage (24V DC or 230V AC is standard) and control signal type. Simple on-off applications may use 24V solenoid actuators. Modulating systems typically require 3-10V proportional control or 4-20mA analogue signals. Many actuators accept PWM (pulse-width modulation) signals from building control systems. Consider whether position feedback is required for system verification.
7. Plan for Installation and Maintenance
Ensure adequate space for actuator assembly and maintenance access. Specify isolation ball valves upstream and downstream for service. Consider whether manual override capability is needed if your application requires manual operation during power loss. Plan for periodic maintenance: electric ball valve actuators typically require minimal service, but seals and internal components should be inspected annually in demanding applications.
Why Choose Actuation Valve & Control
With over 30 years' experience in industrial valve automation, Actuation Valve & Control Ltd provides:
- Expert technical support to specify the correct valve for your application
- Rapid delivery of standard products from our UK warehouse
- Custom solutions for specialised requirements
- Full product traceability and certification documentation
- Competitive pricing on volume orders
- ISO 9001 & 14001 certified manufacturing
Common Questions About Electric Ball Valves
What is the difference between a ball valve and a butterfly valve? Ball valves have a rotating ball with a port; butterfly valves have a rotating disc. Ball valves provide better shutoff and work at higher pressures. Butterfly valves are lighter and more cost-effective for lower-pressure applications.
Can electric ball valves fail safely? Many models include spring-return mechanisms that automatically return the valve to a safe position (either open or closed) if power is lost. Specify failsafe options for critical safety applications.
What is ATEX certification? ATEX certification indicates the valve is safe for use in explosive atmospheres (areas with flammable gas or dust). Zone 1/2 ATEX certifications are required for hazardous location installations.
How long does an electric ball valve last? With proper sizing and maintenance, electric ball valves typically provide 10-15 years of service. Actuators are sealed units requiring minimal maintenance. Seals may require replacement after extended use in demanding conditions.