The 6A air vent has both a float and a thermostatic bellows for use where air, condensate and steam may be present as in one pipe steam heating systems the 6A will discharge air, while preventing the escape of either condensate or steam an outlet check valve prevents the re-entry of air.

Air Vent, Series/Model: Model 6A, Nominal Size: 3/4 IN, Connection Type: NPT, Pressure Rating: 15 PSI Operating, 125 PSI Allowable, Temperature Rating: 450 DEG F, Cast Iron Body Material, Material Standard: ASTM A126 Class B, 3.6 IN Width, 7-1/4 IN Height

• The 6A air vent has both a float and a thermostatic bellows for use where air, condensate and steam may be present (as in one pipe steam heating systems.)
• The 6A will discharge air, while preventing the escape of either condensate or steam
• An outlet check valve prevents the re-entry of air
• Air vents shall be self-adjusting balanced pressure thermostatic type with precision welded multiple plate stainless steel bellows and stainless steel float
• Head and seat shall be stainless steel
• Body and cap shall be cast iron and internals shall be renewable, the outlet shall incorporate a nylon-ball check valve
• Cast iron cap, stainless steel element, element holder and valve head, nylon ball valve, stainless steel spring clip, steel seaking nut
• Bronze seat

• Specification Sheet https://macombstage.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/SpiraxSarco_62048_Specification_Sheet.pdf