Triple Effect D1 GRPP Air Release Valves

Triple Effect Air Release Valves combine the functions of simple effect and double effect air release valves. They have two holes to air evacuation and intake. As the water is filling the pipes, it pushes the air, which is evacuated to the atmosphere through the big hole in the valve. The small hole of an automatic effect is open during this process. When the system is on pressure, the small hole automatically opens when it detects small air bags created by the fluid turbulences.