ASC's general-purpose ABZ™ 709/719 resilient-seated BFVs are machined to offer long life and resiliency in a slim profile that permits maximum open fluid flow. These sturdy valves meet the strictest industry standards for durability and tight shutoff. The 709/719 valves feature superior sealing features such as unique double-V stem self-seals that protect stem areas during vacuum or pressure use. Our ABZ™ valves meet rigorous industry standards that include the American Petroleum Institute (API), the American Society of Mechanical Engineers (ASME) and the American National Standards Institute (ANSI).