APCO High Performance Combination Air Valve (ASU)

The APCO ASU High Performance Combination Air Valve is an innovative concept in air valve technology. Proven with extensive field experience on tough applications, the ASU valve has demonstrated improved performance, reduced maintenance and lower cost for overall reliability on clean fluids or sewage and dirty service applications. The ASU Combination Air Valve meets performance requirements of AWWA C-512 standard “Air Valves for Water & Wastewater Service.”

The unique venting design provides varied and predictable air flow over a wide range of air release and air/vacuum conditions. A large diameter Air/Vacuum Disc provides high volume air flow for rapid venting during pipeline filling and allows high volumes of air to enter the pipeline during draining. During normal pipeline flow conditions, the dual-range air release design prevents air build up and flow restrictions under changing conditions and through the full flow range. This venting design allows application on an almost universal range of flow conditions with effective sealing and operation available in two pressure ranges: 2 psi to 150 psi or 2 psi to 300 psi for high pressure service. Unique disc air release venting concept eliminates linkages that can foul on dirty service applications.

Clean interior design and the direct shaft mounted float eliminates troublesome linkages that can lead to frequent maintenance. The unique float shape reduces the ballistic effect of high-speed liquid flow into the valve, further adding to float stability. The float shaft is fully guided to provide smooth, long-lasting operation.

The ASU Combination Air Valve is ideally suited for corrosive conditions with a 316 Stainless Steel body and float. Internal parts are corrosion resistant high strength stainless steel. All materials and seals are proven long-life components for continuous duty service.  Seals and all parts are suitable for use on water, wastewater or industrial media containing hydrocarbons, chemicals, solvents and volatiles.