The Caleffi NA644300 3BY is a Series 644 motorized ball valve body, 3-way bypass. It is supplied without an actuator, which is ordered separately.
Best for installing the valve body at rough-in and adding actuation at commissioning.
Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.
Key Features
Valve Body Only, No Actuator
Supplied as Series 644 motorized ball valve body, 3-way bypass without an actuator. A Caleffi actuator is ordered separately, so the body can be installed at rough-in and actuated later.
Full-Port Ball Design
A full-port ball gives a low-pressure-drop path when open and tight shutoff when closed.
Technical Specifications
| Product Type | Valve Body |
| Configuration | 3-Way Bypass |
| Medium temperature range | 20-230 °F |
| closing delta p max. | 150 psi |
| Series | 644 Valve Body |
Documentation
Related Products
- Caleffi NA644200 : 644 Motorized Ball Valve Body 2-Way
- Caleffi NA644300 : 644 Motorized Ball Valve Body 3-Way
Frequently Asked Questions
Does Caleffi NA644300 3BY include an actuator?
No. It is Series 644 motorized ball valve body, 3-way bypass, supplied without an actuator. A Caleffi actuator is ordered separately.
What is the warranty on Caleffi NA644300 3BY?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of shipment. ZOT Supply is an authorized Caleffi distributor.
- Product Type:
- Valve Body
- Product Family:
- Motorized Ball Zone Valves
- Series:
- 644 Valve Body
- Configuration:
- 3-Way Bypass
- Supplied As:
- Valve Body Only
- Medium Temperature Range:
- 20-230 deg F