| Model | 1-AV | 2-AV | 3-AV | 6-AV |
| Body Material | ASTM A48 Class 30 Cast Iron |
ASTM A48 Class 30 Cast Iron |
ASTM A48 Class 30 Cast Iron |
ASTM A48 Class 30 Cast Iron |
| Maximum Allowable Pressure | 300 psig @ 200°F (21 barg @ 93°C) |
250 psig @ 450°F (17 barg @ 232°C) |
250 psig @ 450°F (17 barg @ 232°C) |
250 psig @ 450°F (17 barg @ 232°C) |
| Maximum Operating Pressure | 300 psig (21 barg) | 250 psig (17 barg) | 250 psig (17 barg) | 250 psig (17 barg) |
| Connection Sizes | 1/2″ (15 mm) 3/4″ (20 mm) |
1/2″ (15 mm) 3/4″ (20 mm) |
3/4″ (20 mm) 1″ (25 mm) |
1-1/2″ (40 mm) 2″ (50 mm) |
Armstrong free-floating lever air/gas vents use the same bodies, caps, lever mechanisms, valve and seats of Armstrong inverted bucket steam traps that have been proved in years of service.
Elliptical floats and high leverage make it possible to open large orifices to provide adequate capacity for vent size and weight. The hemispherical valve, seat and leverage are identical in design, materials and workmanship to those for saturated steam service up to 1,000 psig (69 bar), with the exception of the addition of a guidepost. The guidepost has been added to ensure a positive, leaktight valve closing under all conditions.
The 1-AV is a cast iron air vent that uses a free-floating lever that closes positively, ensuring a leak-tight closing under all conditions. This vent is good for low capacity air/gas venting up to 300 psi (21 bar).
The 2-AV, 3-AV and 6-AV are cast iron vents use the same proven free-floating lever mechanisms used in Armstrong steam traps. They are for applications where high air/gas venting capacity is required, up to 250 psi (17 bar).
