3/4-KA Combination Air Valve

Application

Valve designed to extract air from pipes, large filters, tanks or any other similar equipment which must work without the presence of air.

The air release valves are located at the outlet of pipes whose slope varies according to the hydraulic gradient, in areas where pipes are located above ground level, in long pipes with uniform slope, at the input of measuring instruments, the output of reducing valves, in diameter reductions, pumps, filtration systems, on both sides of a subterranean crossing road.

For correct operation, the valve should always be in a vertical position.

It is recommended to install a manual ball valve under the ARV, in order to make maintenance and repair operations easier without shutting the whole system.

Performance

• Extracts air from pipes as they fill. When water reaches the inside of the valve, the float rises and seals the discharge outlet (KINETIC).
• Maintains automatically and continuously its function of eliminating any residual air pockets reaching the valve, as the float immediately drops and the closure outlet is partly or totally opened. Water pressure does not interfere with this function (AUTOMATIC).
• Prevents pipes from collapsing. At the smallest decrease in pressure, the float drops and opens the seal allowing outside air to enter the pipe immediately (AIR VACUUM RELIEF).

Advantages

• An exclusive double seal system, together with a low-density float for kinetic function and automatic control, make the valve completely watertight when the pipe is being pressurized or emptied, no matter how slowly these operations are carried out.
• Its new inner design gets the float to resist the air stream even when the flow velocity is faster than the speed of sound at the outlet. The valve will only shut by the action of water.
• Its outlet elbow features an internal filter to prevent debris from entering inside the valve.

Technical specifications

• Combination air valve.
• At least 800 m3/h (471 CFM) of air released without having the valve shut while no water present.
• Released air volume is at least 130 m3/h (76.5 CFM) at 0.4 bar (5.8 PSI).
• Maximum working pressure 16 bar (232 PSI).
• Body and base made of fiberglass reinforced polyamide.
• Treated for protection from UV radiation.
• 3/4"M base thread.
• Optional base in BSP or NPT. Brass base only available NPT.
• 3/4"Female threaded outlet includes filter.