Trifunctional Air Valve
The Duvalco Trifunctional Air Valve combines three essential air functions in one compact unit — air release, air admission, and air discharge — offering complete protection for pressurized pipelines. It is designed to operate reliably during pipe filling, draining, and under normal flow conditions, making it ideal for a wide range of water distribution applications.
Design standard
EN 1074-4
Body material
High-quality ductile iron for enhanced strength and durability
Float mechanism
ABS float for lightweight and corrosion-resistant operation
Triple function
1. Air release of small, accumulated air pockets during normal operation
2. Air admission during pipeline draining to prevent vacuum formation
3. Air discharge of large volumes during pipeline filling
Coating
Fusion-bonded epoxy coating (WRAS-approved) for both internal and external corrosion protection
All materials in contact with water comply with BS 6920
ensuring safe use in potable water systems
Working temperature
0°C to 80°C
Flange connection
EN 1092-2, PN10/PN16
Size range
DN40–DN300 (Double ball type for DN40-150; Triple ball type for DN200-300)
