Comparato Microdiam: Compact Motorized Valves

The ideal solution for zoned air conditioning

Problem: In modern air conditioning systems (e.g., offices, hotels), fan coil units are hidden in false ceilings or tiny niches. Traditional valves are too bulky, and the electrothermal heads (the wax ones) are slow and often get stuck.

Solution: The Microdiam Motorized Valve combines the speed and power of an electric motor with the necessary compactness. Being a ball valve, when it opens, it guarantees 100% flow, improving the terminal's thermal efficiency and reducing water noise.

Microdiam vs Diamant 2000: Which one is needed?

Although the operating principle is similar, the differences are dimensional:
🔹 Diamant 2000: For boiler rooms, risers, pipes from 1" to 3". High torque.
🔹 Microdiam: For terminals (fan coils), floor manifolds, 1/2" and 3/4" pipes. Pair suitable for small valves.
Always check the servo connection if you are only replacing the motor!

Frequently Asked Questions about Microdiam

1. Can I use the Microdiam instead of a thermoelectric valve (head)?

Yes, and it's a great upgrade. The electrothermal valve takes 3-4 minutes to open, while the Microdiam takes just a few seconds (e.g., 30-60 seconds). Furthermore, the Microdiam isn't as sensitive to dirt as piston valves. Just make sure you have enough space and the right wiring (the Microdiam requires live, neutral, and ground, or fixed live and controlled live, depending on the model).

2. Is there a 3-way version?

Yes, the Microdiam series is very popular in the 3-way diverter version. It is essential in fan coils to divert water to the bypass when the unit is off, maintaining circulation in the main loop.

3. Can the motor be replaced without draining the system?

Absolutely. As with all Comparato valves, the servo (the electrical part) is separate from the valve body (the hydraulic part). You can unscrew/disconnect the faulty motor and install the new one without touching the pipes or spilling a drop of water.