FCU Electric Valve

Introduction to FCU Electric Valves

In HVAC systems, FCU Electric Valves play a key role in controlling the flow of hot or chilled water supplied to fan coil units, directly influencing temperature regulation in each zone. These valves receive control signals from thermostats or central controllers and perform open/close operations based on preset modes, ensuring stable system operation and quick response to actual thermal load demands.

In terms of structure, FCU Electric Valves typically consist of a valve body, sealing components, and an electric actuator. The design focuses on compact size for easy installation within FCU units, while maintaining high sealing performance to minimize leakage and pressure loss. With a clear on/off operating mechanism, these valves are well-suited for central air conditioning systems in office buildings, hotels, residential complexes, and commercial projects.

Watts FCU Electric Valves stand out through their engineering quality and long-term operational stability. Developed in accordance with international HVAC standards, these products emphasize durable materials, precise flow control, and safe continuous operation. This ensures reliable performance in modern HVAC systems with demanding technical requirements.

Operating Principle of FCU Electric Valve

FCU electric on/off valves regulate water flow based on control signals from a thermostat or central HVAC controller. When the room temperature deviates from the set point, the controller sends an electrical signal to the actuator, commanding the valve to open or close according to the heating or cooling demand.

The actuator converts the electrical signal into mechanical motion. Depending on the valve design, this motion moves or rotates the stem, changing the position of the disc or ball. When open, hot or chilled water flows through the valve into the FCU; when closed, the flow is completely shut off. Many FCU valves are equipped with a spring return mechanism, allowing the valve to return to a safe position in the event of a power failure.

Watts FCU Electric Valve Product Line

To meet different technical requirements in FCU systems, Watts offers a range of FCU Electric Valves with various configurations and operating characteristics. Each product line is designed to suit specific installation methods, flow requirements, and operating conditions in HVAC systems.

Series W-F129-20T

The W-F129-20T FCU electric valve is developed for HVAC systems using fan coil units, providing flow control of chilled or hot water based on control signals. It supports both 2-way and 3-way configurations, suitable for shut-off or flow diversion applications. The forged brass body ensures mechanical strength, while the electric actuator operates reliably and includes a spring return mechanism for fail-safe operation during power loss. Its compact design allows easy installation in confined FCU spaces.

Below are the key technical specifications of the W-F129-20T series:

• Valve size: DN15 – DN25
• Body material: Forged brass (HPb59-2)
• Nominal pressure: PN20
• Temperature range: 0°C to 94°C
• Connection standard: Threaded according to GB/T 7306.1-2000
• IP grade: IP20
• Working medium: Water, Ethylene Glycol solutions

Series W-FCBV-20T

The W-FCBV-20T is an electrically actuated ball valve designed specifically for HVAC systems using fan coil units (FCU). It enables precise control of chilled or hot water flow supplied to the FCU, ensuring stable room temperature regulation based on control signals. The ball valve structure, combined with a bidirectional electric actuator, provides tight sealing, smooth operation, and minimizes water hammer in the system. Its flexible design allows actuator installation after piping completion, making installation and maintenance more convenient.

Below are the key technical specifications of the W-FCBV-20T series:

• Valve size: DN15 – DN32
• Body material: Forged brass (HPb59-2)
• Nominal pressure: PN20
• Temperature range: 1°C to 95°C
• Connection standard: Standard British flat thread BSPP (internal thread)
• IP grade: IP65
• Working medium: Water, Ethylene Glycol solutions

Toan Cau – Exclusive Distributor of FCU Electric Valves in Vietnam

In Vietnam, Toan Cau Building Materials Co., Ltd. is the exclusive distributor of Watts FCU Electric Valves. Direct distribution from the manufacturer ensures genuine products, accurate technical specifications, and full compatibility between valves, actuators, and accessories. This is especially important for FCU systems requiring high stability and continuous operation.   

In addition to FCU electric valves, Toan Cau supplies a complete range of Watts industrial valves, including safety valves, pressure reducing valves, balancing valves, control valves, check valves, backflow preventers, strainers, and connection accessories. This comprehensive portfolio enables engineers and contractors to select suitable solutions for HVAC systems, water supply, and specialized technical applications.

With years of experience in the industrial valve sector, Toan Cau provides strong technical consultation, full CO/CQ documentation, and clear support policies throughout project implementation. For detailed consultation on Watts FCU Electric Valves and related solutions, please contact the hotline 0911 771 551.