Product Overview

The HVC Fan Coil Unit Thermostatic Control Valve is a core component in HVAC systems, designed for precise control of hot/cold water flow to fan coil units (FCU). By regulating the amount of chilled or hot water supplied to the coil, the valve dynamically matches the actual room load, ensuring stable indoor temperature, improved energy efficiency, and reduced energy consumption. Its performance directly impacts indoor comfort, system operating efficiency, and overall HVAC energy usage.

Product Features & Advantages

Precise room temperature control: Based on feedback signals from the room temperature sensor, the valve automatically adjusts its opening degree to regulate the flow of chilled/hot water, maintaining stable room temperature at the setpoint.
Energy saving: Prevents excessive supply of chilled/hot medium, reducing unnecessary energy consumption of chillers and pumps. Energy savings can reach approximately 15%–30%.
Long service life: Equipped with functions such as anti-freeze protection and overcurrent protection, extending operational lifespan and improving system reliability.
Interlocked control capability: Can be linked with FCU fan speed control. When valve opening decreases, fan speed automatically reduces, further lowering fan energy consumption.
Fast response and load adaptability: The electric actuator responds to thermostat commands within seconds and quickly adjusts valve opening. When indoor load suddenly increases (e.g., occupancy rise or higher solar gain), the valve rapidly opens to increase flow; when load decreases, it promptly closes to avoid thermal lag.
Direct communication control: Supports direct connection with room thermostats via RS485 communication protocol, enabling direct control of valve opening/closing.
Multiple power supply options: Supports AC 220V ±10% and DC 24V ±5% power supply.

Technical Specifications

Item	Specification
Nominal Size	DN15, DN20, DN25 (for different FCU flow requirements)
Working Pressure	1.6 MPa (standard type), 2.5 MPa (high-pressure type)
Valve Body Material	Brass (H59-1), Stainless Steel (304, corrosion-resistant optional)
Leakage Rate	≤ 0.01% of Kv (soft-seated), ≤ 0.1% of Kv (metal-seated)
Power Supply	AC 220V ±10%, DC 24V ±5%
Operating Power	≤10W (operation), ≤0.1W (standby)
Service Life	2-way valve: ≥50,000 cycles; ball valve type: ≥100,000 cycles
Communication	RS485
Temperature Control Accuracy	±0.5°C
Operating Temperature	Valve body: 5°C–120°C (fluid), actuator: -10°C–50°C (ambient)
Protection Class	IP54
Water Medium Temperature	0°C–95°C