Blow-out Proof Stem
Fire Safe Design
Emergency Sealant Injector
The top entry ball valve is mainly applicable for pipeline and industry systems such as petroleum, chemical engineering, and nuclear power plants. Its body adopts integrated design, reducing leak points. Its seat design is available for either soft or hard seal, easy for maintenance. It has a top entry and online maintenance function. It has a lot of advantages, such as small fluid resistance, simple structure, small volume, lightweight, reliable sealing, convenience for operation and maintenance, open and close quickly, as well as start and close flexibly. Its most difference from the common ball valve is that its maintenance can be made on pipeline and without dismounting from the pipeline. The backspace seat structure is adopted for the seat and the rear portion of the seat retainer is the oblique angle to prevent the accumulation of impurity from affecting the back space of the seat.
It’s featured by its small torque and reliable seal; and unlike common ball valve types, its seat with a spheroidal structure can adjust the seal position automatically.
DATIAN series BT Top entry ball valves are available in size 2~24” ANSI class rating 150 to 1500 and temperature ratings of -46 to 250. An ll meet the fire safety requirement of BS 6755 and API 6FA.
The top entry trunnion supported the design and unique seat retraction technique gives the convenience of in-line repair or replace valve internal components without dismantling it from the pipeline.
Because each ball seat shuts off the line fluid independently on the upstream side, so this series of ball valves are suitable for double block and bleed application. A secondary sealant injection system for stem and seat is provided for the emergency stop of the accidental seat or stem leakage.