3-Way Valve for Galletti UTN Fan Coils Sizes 12 to 16A

The Galletti UT51000263 3-way valve, identified as model V12, is a hydraulic accessory designed to regulate water flow in ducted fan coils from the Galletti UTN range. It is specifically intended for sizes UTN 12D, UTN 12A, UTN 16D and UTN 16A and features a 1" hydraulic connection.

The valve controls the water flow through the fan coil coil using a three-way system with integrated bypass. Combined with a compatible actuator and control, it allows climate regulation by acting on the water flow passing through the heat exchanger. Reference UT51000263 corresponds to the valve body without actuator, so the motorized actuator must be selected separately when automatic control is required.

3-way valve for Galletti UTN fan coils

The UT51000263 is part of the hydraulic accessories developed for Galletti UTN ducted units.

Its function is to manage the water circulation through the fan coil coil hydraulically. In combination with an actuator controlled by a thermostat or electronic controller, it allows the flow to be interrupted or diverted according to the room’s thermal demand.

Compatible with UTN 12 and UTN 16

The technical and commercial documentation identifies this valve specifically for the following sizes:

• Galletti UTN 12D.
• Galletti UTN 12A.
• Galletti UTN 16D.
• Galletti UTN 16A.

The letters D and A identify different performance configurations within the UTN range, while the V12 valve is common to these sizes.

1" hydraulic connection

The Galletti V12 valve uses a 1" connection, sized for the hydraulic flow rates corresponding to UTN 12 and UTN 16 sizes.

Before installation, the fan coil connections, hydraulic orientation and pipe layout must be checked according to the mounting diagram provided by Galletti.

3-way operation

The 3-way configuration allows the water flow to be diverted between the fan coil coil and a bypass line.

This system maintains an alternative hydraulic circulation when the water flow through the heat exchanger is reduced or interrupted, making it a common solution in fan coil installations where regulation is carried out using motorized valves.

Integrated bypass

The technical documentation for the range identifies the valve body as a 3-way valve with integrated bypass and four hydraulic connections.

This configuration makes it possible to control the water flow through the coil while maintaining the hydraulic circuit specified by the manufacturer when the valve changes position.

Room temperature control

When the valve is combined with an actuator and a compatible thermostat or controller, the system can regulate the room temperature by acting on the water flow passing through the fan coil coil.

When there is a demand for heating or cooling, the valve allows water to pass through the heat exchanger. When the setpoint is reached, the control system can change the valve position and divert the hydraulic flow.

Reference UT51000263 supplied without actuator

Galletti commercial documentation 2025/2026 specifically identifies UT51000263 as a 3-way valve without actuator.

This is important when preparing the installation materials: the electric actuator required to automate the valve movement must be selected separately according to the intended control type.

ON/OFF actuator available separately

For UTN sizes up to 16A, Galletti offers a 230 V ON/OFF electrothermal actuator compatible with its 2-way and 3-way valves.

The reference indicated in the documentation for this actuator is:

• FC51000374: 230 V ON/OFF actuator for compatible valves in the UTN range up to size 16A.

The actuator is not included with reference UT51000263 and must be added when automatic operation is required.

Optional modulating actuator

Galletti also provides modulating control for certain control systems.

For compatible sizes up to UTN 16A, the following is available:

• FC51002645: 0-10 V modulating actuator with 24 V power supply.

The use of a modulating actuator must be checked together with the controller and the control logic planned for the installation.

Compatible with different Galletti controls

The UTN range allows motorized valves to be integrated with different Galletti control solutions.

Among the control families contemplated by the manufacturer are:

• MY COMFORT.
• LED503.
• EVOBOARD and EVODISP.
• TED controls for ON/OFF valves.

Actual compatibility will depend on the installed actuator, its supply voltage and the type of control signal required.

Accessory for the main coil

In the current UTN accessory configuration, Galletti identifies the 3-way valves intended for the main coil under the V3VSTD family.

These solutions allow hydraulic control of the coil used for cooling or heating, especially in 2-pipe installations, although the UTN range also offers specific solutions for additional coils in 4-pipe systems.

Use in hydronic installations

The valve is intended for water-based HVAC circuits with compatible Galletti fan coils.

It can be integrated into installations supplied by generators such as:

• Air-to-water heat pumps.
• Chillers.
• Boilers.
• Centralized chilled water and hot water production systems.

Operating pressure, temperature and flow rate must always remain within the limits established for the fan coil, the valve and the rest of the circuit components.

Professional application in HVAC installations

The UT51000263 is especially aimed at installers and maintenance technicians who need to add hydraulic control to a compatible UTN fan coil.

It can be used in both new installations and maintenance or replacement operations for an existing valve, provided that the reference, fan coil size and connections match.

Technical features of the Galletti UT51000263

• Brand: Galletti.
• Reference: UT51000263.
• Designation: V12.
• Type: hydraulic valve for fan coil.
• Number of ways: 3.
• Bypass: integrated.
• Number of body connections: 4.
• Connection: 1".
• Compatibility: UTN 12D, 12A, 16D and 16A.
• Application: regulation of water flow through the fan coil coil.
• Actuator included: no.
• Compatible ON/OFF actuator: available separately.
• 0-10 V modulating actuator: available separately depending on configuration.
• Use: hydronic HVAC installations.

Galletti V12 valve for UTN fan coil control

The Galletti UT51000263 is the specific 3-way valve for UTN 12D, 12A, 16D and 16A fan coils. Its 1" connection, bypass configuration and the possibility of incorporating ON/OFF or modulating actuation make it suitable for hydraulic control systems adapted to the needs of each installation.

As it is supplied without an actuator, the professional can select the actuation and control system compatible with the project. To ensure correct operation, the exact fan coil model, actuator, controller and hydraulic diagram should always be checked before installation.