Single Chamber Air Valve (4 Functions)

Key features/benefits

This type of air valve is the new generation design of combination air valve to compansate for the pipe-line design and application defects at air discharge criterion.

It accomplishes 4 functions in a single chamber rather than the triple funtion in double chamber design, by limiting the air discharge during uncontrolled pipe-line filling.

“With its anti-shock orifice design, it prevents water hammer and pressure surges in pipelines caused by sudden fluctuations

Functions: 

1) Discharge of air in high volume in the pipe-line to atmosphere during pipe filling. ( Atmospheric Function)

2) Intake of air in high volume into the pipe line during pipe-line emptying. ( Atmospheric Function )

3) Discharge of low volumes of air preventing them to accumulate and form “air-pockets” during pipe-line operation. ( Pressurized Function )

4) Limiting of the air flow velocity during disharge when uncontrolled or high velocity pipe-line filling. This causes an air-cushion in the pipe-line, lowering the approach velocity of water running, reducing the risk of induced impact (surge) on reduced speed arrival of water ( wet-closure) of the main float.