Dual Function Air Valves

Reliable Air Release & Vacuum Protection

IO Valves Dual Function Air Valves are designed to release large volumes of air during pipeline filling and admit air during pipeline draining. These valves do not release air under normal operating pressure, making them suitable for applications where continuous air release is not required.

Key Features

• Dual function operation enabling large air release during pipeline filling and air admission during draining

• Effective vacuum protection to prevent pipeline collapse under negative pressure conditions

• Robust ductile iron construction designed for long and reliable service life

• Simple float-operated mechanism ensuring automatic operation with minimal maintenance

• Corrosion-resistant epoxy powder coating suitable for water service

• EN-compliant design, manufactured and tested to applicable EN standards

Pressure Rating PN 10/PN 16

Size Range DN40 – DN 150

Design & Testing Standards

• Design Standard: EN 1074-4

• Flange Drilling: EN 1092-2

• Testing: EN 12266-1

• Operating Temperature: 0 °C to +80 °C

Material of Construction

Body : Ductile Iron GGG 50

Bucket : Ductile Iron GGG 50

Ball Float : ABS

Inside Cover : Ductile Iron GGG 50

Outside Cover : Ductile Iron GGG 50

Gasket : NBR

Bolts : Carbon Steel

Coating : Epoxy Powder Coating ≥ 250 μm

Typical Applications

Combination Air Release Valve

High Performance Triple Function Air Valve (TFAV)

Main Water Transmission Pipelines

Water Utility Lines

Irrigation Systems