How Do Electric Ball Valves Maintain Position during Power Outages or Failures?

1.Spring-Return Mechanism: Electric ball valves commonly utilize a spring-return mechanism to ensure fail-safe operation during power outages. This mechanism is integrated into the actuator design and works by compressing or tensioning a spring when the valve is in the open or closed position, respectively. In the event of a power failure, the stored energy in the spring is released, causing the actuator to move and the valve to return to its fail-safe position. This ensures that the valve remains in a predetermined state, preventing unintended flow or leakage in the system. Spring-return mechanisms are reliable and effective, providing a simple yet robust solution for maintaining valve position during power interruptions.

2.Battery Backup: Electric ball valves equipped with battery backup systems offer an additional layer of reliability during power outages. These systems typically consist of rechargeable batteries housed within the actuator assembly. In normal operation, the batteries remain charged and ready to provide emergency power if needed. When a power outage occurs, the batteries automatically supply power to the actuator, allowing it to maintain its position until mains power is restored or alternative power sources are activated. Battery backup systems are particularly beneficial in critical applications where uninterrupted valve operation is essential for safety and system integrity.

3.Mechanical Locking Mechanisms: Some electric ball valves feature mechanical locking mechanisms designed to secure the valve in its current position. These mechanisms may include locking pins, cams, or wedges that engage with corresponding features on the valve body or actuator housing. Once engaged, the locking mechanism prevents the valve from moving or shifting due to external forces or pressure changes. Mechanical locks provide a reliable fail-safe solution, ensuring that the valve remains in the desired position even in the absence of electrical power. Additionally, they offer added security against tampering or unauthorized operation of the valve.

4.Fail-Safe Position Programming: Electric ball valves can be programmed to automatically assume a predefined fail-safe position in the event of a power loss. This programming allows system designers or operators to configure the valve actuator to move to a specific position, such as fully open or fully closed, when power is interrupted. The selection of the fail-safe position is based on the requirements of the application and the desired response to a loss of power. Fail-safe position programming provides flexibility and customization options, allowing valves to be tailored to meet the needs of different systems and environments.

5.Manual Override Functionality: Many electric ball valves are equipped with manual override features that enable operators to manually control the valve position during power outages or emergencies. Manual overrides typically involve the use of handwheels, levers, or crank handles that directly manipulate the valve actuator or mechanism. By manually operating the valve, operators can adjust the position as needed to maintain system functionality until normal power is restored. Manual override functionality provides an additional layer of redundancy and ensures that valves can be operated even in the absence of electrical power or automation systems.

Dy-303 Small size corrosion-resistant hand-in-one electric ball valve 220V

Structural features
1. Brass forging valve body, stainless steel rod and spring, small size and corrosion resistance
2. The valve core structure is optimized, and the allowable pressure difference is large without reducing the Ky value.
3. The driver is separated from the valve body and can be quickly disassembled.
4. The driver has a manual operating lever for system debugging and maintenance.
line, the black line is the common line. Three lines and two controls, two live lines and one zero line (one valve opening line plus one closing valve line plus common zero line) control the valve. The blue line is the closing valve