The TTV range of bronze disc butterfly valves come with approvals from recognised bodies such as DNV, ABS, LR and Bureau Veritas. The bronze disc valves are commonly used in oil and gas processing plants as well as marine. The Koei UNIC Electric Actuator has a number of safety features including an easy to use Allen Key Manual Override, overload protection system and end-of travel electric stop for when you need it most. The concentric design of the butterfly valves allows for an elastic, replaceable seat that takes on both shape and size to form a perfect seal. This TTV Butterfly Valve is suitable for use in either on and off or throttling applications with no loss of functionality.