Double orifice air valve that combines both large orifice & small orifice functions within one unit. The large orifice allows air to be expelled from the system during filling of a pipeline and admit air back into the system whenever subatmospheric pressure occurs. Air is vented from the system until water enters the valve and lifts the float against its seat, ensuring a tight seal. In the event of sub-atmospheric pressure in the system, the water level drops causing the float to fall from its seat and allow the admission of air.
|Dimensjon||25mm (1”) - 200mm (8”) sizes|
|Trykk||0.2 bar up to 16 bar.|
|Temperatur||0°C to +70°C|
• Various materials available for sea water or corrosive applications.
• Various flange drillings.
• Screwed or flanged outlet facility.
• Viton rubber seat.
• Metal float options.
• Surge arrestor, inflow / outflow check device, vented non-return device, adjustable throttle device.
• Bib tap / test point.
• Isolating valve.
• 25 bar version.
• 40 bar version (on 25mm only)
Seat 1.1 x PN Body 1.5 x PN
|Body Ductile||Iron ENGJS-500-7|
|Cover Ductile||Iron ENGJS-500-7|
|Shield plate Ductile (Spun steel on 150 & 200mm)||Iron ENGJS-500-7|
|Large orifice seat||EPDM rubber|
|Large orifice float||ABS plastic|
|Small orifice float||ABS plastic|
|Orifice plug||Glass filled nylon 6|
|Orifice nut||Glass filled nylon 6|
|Hinge pin||316 Stainless steel|
|Stop screw||316 Stainless steel|
|Small orifice seal||EPDM rubber|
|Chamber O-ring||EPDM rubber|
|Gasket, orifice plug||EPDM rubber|
|Shield studs & nuts||304 Stainless steel|
|Cover bolts & nuts||304 Stainless steel|
|Chamber setscrews||304 Stainless steel|
|Chamber Ductile Iron||ENGJS-500-7|