The AVK Series 55 large diameter gate valves have been in production since 1999.  These gate valves are designed to meet the requirements of AWWA C515, the standard for “Reduced Wall, Resilient Seated Gate Valves for Water Supply Service.”

This standard covers gate valves constructed in ductile iron and requires a minimum wall thickness for each valve size.  Because these valves are made of ductile iron, as opposed to gray iron, the wall thickness of the body and bonnet castings and the flanges are allowed to be thinner than those made to the AWWA C509 gate valve standard.