930001NT Dynamic Balancing Valve

• Dual function — electric switching and dynamic balancing in one valve – Replaces the separate combination of a zone control valve plus a dynamic balancing valve with a single compact unit, reducing installed cost, space requirement, and potential leak points in the piping system
• Thermostat-controlled electric switching at AC 220V – Opens and closes on command from a room temperature controller, enabling room-by-room on/off zone control of the fan coil circuit with direct compatibility with standard HVAC thermostat outputs
• Self-acting dynamic balancing when open – When the valve is in the open position, the internal dynamic balance mechanism automatically maintains constant flow within the design range regardless of differential pressure fluctuations in the system caused by other zones opening or closing
• Factory-set to design flow – The valve can be preset at the factory to the specific design flow required by the end equipment, ensuring the terminal always receives its correct flow rate without commissioning adjustment on site
• Flow deviation ≤5% – Tight flow accuracy across the full working pressure differential range, supporting precise temperature control and energy-efficient system operation
• Three pressure differential variants – Available for differential pressure ranges of 20–150 kPa, 25–240 kPa, and 30–300 kPa, covering different system pressure conditions and enabling correct valve selection for the specific installation
• Wide temperature range -10°C to 120°C – Compatible with chilled water cooling, low-temperature heating, and high-temperature heating systems, covering all standard HVAC applications in a single product range
• Stainless steel valve core – Corrosion-resistant internals extend service life in both heating and cooling water circuits with varying water chemistry
• IP44 protection – Actuator rated for indoor installation in HVAC plant rooms and ceiling voids with protection against solid objects and water splashing

Pressure Differential Variants and Flow Range

Select the pressure differential variant that matches the expected differential pressure at the valve’s installation point under all operating conditions. Contact the Legom team if the system pressure differential is uncertain.

• Fan coil unit zone control in commercial HVAC systems – The primary application. Each FCU is controlled by a room thermostat connected to the 930001NT’s electric actuator, which opens the valve when heating or cooling is needed and closes it when the setpoint is reached — while the dynamic balancing function ensures design flow is maintained regardless of what other FCU zones are doing
• Multi-zone variable flow HVAC systems – In systems where multiple zones operate independently, the dynamic balancing function prevents hydraulic interaction between zones — a zone that opens does not starve other zones, and a zone that closes does not cause overpressure in remaining open zones
• District heating and cooling terminal connections – Applied at each terminal connection point in district energy networks where supply pressure fluctuates with overall network demand, ensuring each terminal consistently receives its design flow
• Regional zone control applications – Used in larger HVAC systems where groups of terminals or floors are controlled as a single zone, with the 930001NT providing both the on/off switching and hydraulic balancing for the zone connection
• Chilled water fan coil systems – The -10°C to 120°C temperature range and stainless steel valve core make the 930001NT equally suited to chilled water cooling circuits in summer and hot water heating circuits in winter, enabling year-round use of the same valve

• The actuator must be installed horizontally — it must not be inverted (upside down). The valve body itself can be installed horizontally or vertically, but the actuator orientation is fixed
• Use only standard G thread (parallel pipe thread) connections. Do not use taper thread fittings — the valve body threads are designed for G thread only and taper thread connections will damage the valve body
• Clean the valve and pipeline thoroughly before installation to remove grit, scale, and debris that could damage the dynamic balance mechanism or contaminate the valve seat
• Insulate the pipeline and valve body as required for the application, but do not wrap insulation around the actuator. The actuator requires ambient air circulation for normal operation and heat dissipation
• Install the valve with the actuator accessible for wiring, commissioning, and future maintenance. Do not install in inaccessible ceiling voids without provision for access
• Connect the actuator to the AC 220V room thermostat output according to the wiring diagram. Ensure the thermostat output rating is compatible with the actuator’s electrical load
• Select the correct pressure differential variant (20–150, 25–240, or 30–300 kPa) for the expected differential pressure at the installation point before ordering
• Refer to the installation diagram showing the typical fan coil unit configuration — the 930001NT is installed on the supply or return connection at the base of the FCU, below the coil

Legom supports OEM and ODM services for the 930001NT Dynamic Balancing Valve. Our engineering team can customize flow rate, pressure differential range, connection size, voltage, and body specifications for specific project requirements. Factory flow presetting is available for OEM and project orders. All customization projects are handled with strict confidentiality. Contact us via WhatsApp or info@legomsmart.com.