The combination air valve integrates the functions of both air/vacuum and air release valves. It automatically expels large volumes of air during system start-up, admits air when internal pressure drops below atmospheric levels, and continuously releases small pockets of air during operation. This dual-action functionality ensures maximum protection and efficiency for pressurized piping systems.
Key Features:
- Combines air/vacuum and air release valve functions
- Vents large air volumes at start-up and admits air during vacuum conditions
- Continuously releases small air pockets under pressure
- Dual orifice design for efficient air handling
- Certificate: UL Listed
- Standard: UL 2573, NFPA 20, AWWA C512
- Connection: Threaded NPT, Flanged (B16.1 Class 125 / B16.5 Class 150, etc.)
- Feature: Large and small orifices for both venting and air intake
- Temperature Range: 0 ~ 80°C
- Working Pressure: 300 psi
- Surface Coating: Fusion Bonded Epoxy (FBE) as per AWWA C550
