TOP ENTRANCE BALL VALVE
Pressure class: PN16~PN240(Class 150~Class 1500)
Diameter range: DN50~1200 NPS 2"-48"
Material: Cast Steel & Forged Steel Body
Floating & Trunnion Mounted Ball, Full & Reduced Bore
End connection: Flange, B-Welded
Design and manufacture standard: ASME B16.34, API608, API6D and BS5351
End flange: ASME B16.5
Butt Weld: ASME B16.25
Inspection and Testing: API598
Face to face : ASME16.10 and DIN3202
Fire Safe Test : API 607/API 6FA
Blow-out Proof Stem
Fire Safe Design
Emergency Sealant Injector
Top entrance ball valve is mainly applicable for pipeline and industry system such as petroleum, chemical engineering and nuclear power plants. Its body adopts an 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 on line maintenance function. It has a lot of advantages, such as small fluid resistance, simple structure, small volume, light weight, reliable sealing, convenience for operation and maintenance, open and close quickly, as well as start and close flexibly.
Its most difference from common ball valve is that its maintenance can be made on pipe line and without dismounting from the pipe line. The back space seat structure is adopted for the seat and the rear portion of seat retainer is oblique angle to prevent accumulation of impurity from affecting back space of 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.