Small / Large Orifice Air Valve Ductile Casting Iron Flanged End

Ductile Casting Iron Flanged End Small And Large Orifice Air Valve

Air valves:

Air valves in pipeline systems serve two primary functions.

1. The first is the release of accumulated air that comes out of solution within a pressurized pipeline. This air will result in bubble formation, which will gather at localized high points along the pipeline profile. This air accumulation will occur when the bubble’s buoyancy is greater than the energy to convey the bubble with the liquid.

Air valve used to release this free air is known as an air release valve.

2. The second function of an air valve is to admit air into the system when the internal pressure of the pipeline drops below atmospheric pressures. By admitting air into the pipeline as the internal vacuum condition develops, the magnitude of the vacuum pressure can be reduced and as a result help prevent the pipeline from experiencing excessive deflection and/or collapse as well as help prevent the formation of a full vacuum condition in which vapor cavities may form from the fluid vaporizing. 

Air valves can contribute to the improvement of the efficiency of the water system.

Technical details:

Technical features and benefits:

• Body and cover in ductile cast iron, PN 40 bar rated.
• Float in stainless steel AISI 304.
• Lever and pivots in AISI 303/316.
• Nozzle in stainless steel AISI 303/316.
• Compass lever technology to allow large air release capacity through the nozzle.
• Double O-ring to guarantee the perfect water tightness during working conditions.
• Gasket compression control thanks to the adjustable nozzle.
• Minimum working pressure 0,1 bar.

Applications:

• Water distribution systems, irrigation, buildings.
• Pumps case.
• Control valves and modulating devices.
• In general only when the air release function is required, it can be combined with Air valves for the kinetic functions of air outflow and inflow.

Working conditions:

Treated water max. 70°C; Designed in compliance with EN-1074/4.

Max. 40 bar;Standard connection 1", flanged on request. Flanges according to EN 1092/2.

Min. 0.1bar. Epoxy painting applies through fluidized bed technology blue RAL 5005.

Changes and variations on the flanges and painting details available on request.