Air Valves
Combination Air Release Valve – Triple Function | Anti-Shock | Non-Slam
IO Valves Combination Air Release Valve is a self-operating, float-controlled valve designed for automatic air management in water pipeline systems. Installed at pipeline high points, it efficiently releases accumulated air and gases under pressure, admits air during pipeline draining or vacuum conditions, and discharges large volumes of air during pipeline filling, thereby ensuring system safety and operational reliability.
Size Range: DN 40 – 300 Pressure Rating: PN 10|16|25
Design Standard: EN 1074-4
Flange Drilling: EN 1092-2
Testing: EN 12266-1
Material of Construction
Body/Bonnet
Float
Disc
Guide Rod
Bushing
O Rings
Dust Screen & Cover
Fasteners
Coating
Operating Temperature
: Ductile Iron GGG 50
: SS 304
: SS 304
: Brass
: SS 304
: NBR
: SS 304
: SS304
: Epoxy Powder Coating Min.250µ
: 0°C to +80°C
Design and Construction Features
Ø Float-operated, fully automatic mechanism
Ø Stainless steel float manufactured from SS304 / SS316
Ø Integrated anti-water hammer (anti-shock) system
Ø Smooth guide cage ensuring stable and friction-free float movement
Ø Stainless steel anti-insect screen for reliable long-term operation
Ø Full-bore valve body for unrestricted airflow
Ø Precision-machined seating for dependable sealing
Ø Designed for vertical installation at pipeline high points
Functional Performance
Large Air Release: Rapid discharge of large air volumes during pipeline filling
Air Admission: Automatic intake of air during pipeline emptying or negative pressure
Entrapped Air Release:Continuous release of accumulated air under operating pressure
Performance Characteristics
Parameter
Specification
Minimum Sealing Pressure
0.2 bar
Water Tightness
100% leak-tight
Operating Mode
Automatic, float operated
Installation Position
Vertical
Typical Applications
Ø Potable water transmission lines
Ø Pumping mains
Ø Water treatment plants
Ø Irrigation networks
Ø Municipal water distribution system
Air Valves
IO Valves Combination Air Release Valve is a self-operating, float-controlled valve designed for automatic air management in water pipeline systems.
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