Automatic air valves, with double orifice and integrated valve, flanged PN 16, 25

Valvotubi double air release valve with isolating valve art.706-712
Article: 706-712
Flanges: UNI EN 1092-2 PN 16-25
Installation: at the high part of pipelines
APPLICATIONS • Aqueducts • Irrigation plants
- Fig. 706: flanges drilling PN 16
- Fig 712: Flanges drilling PN 25
Epoxy paiting suitable for drinking water applications.

The double orifice automatic air valves with integrated valve are used for applications related to troubles with air in the pipelines. The double air valves with integrated valve working as isolating valve allow maintenance or replacement of balls in line.
The minimum pressure on seat is 0,3 bar.

The double ball air valves have three functions:

  • Discharge large amount of air during filling operations
  • Discharge small amount of air during working operations
  • Let air in during piping emptying operations
Materials
body ductile iron GGG40/50, EN-GJS-400/500
cover ductile iron GGG40/50, EN-GJS-400/500
floating balls ABS / NBR / st.st. AISI 304
gasket EPDM
painting epoxy
DN L mm. H mm. D mm. Weight kg.
50 290 415 165 22
65 290 415 185 30
80 290 425 200 30
100 530 480 220 52
150 656 515 285 109
200 790 615 340 196
DN Nominal pressure Test pressure Mpa Max working pressure Mpa
mm BAR body seat 40°C
50-200 16 2,4 1,76 1,6
50-200 25 4,0 2,75 2,5
DN of pipeline DN of air valve
< 200 mm DN 50
200 mm - 250 mm DN 80
300 mm - 500 mm DN 100
600 mm - 900 mm DN 150
1000 mm - 1200 mm DN 200
> 1200 mm DN 250 o 2 x DN 200