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ANSI Valves - Trunnion Ball Valve

Construction feature

Design and Manufacture: API 6D, BS5351, ASME B16.34 

API 608, MSS-SP-72

Face to Face Dimension: ASME B16.10

End flange dimension: ASME B16.5(for NPS≤24); ASME B16.47 series B,

 API 605 or ASME B16.47 series A, MSS SP-44(-for NPS≥24)

BW Connection Dimension: ASME B16.25

Test And Inspection: API 598

Fire-safe Design: API 607/6FA

Anti-static Design & anti Blow-out Stem

 

Construction feature

According to customers' requirement, the trunnion ball valves are provided with devices for urgent grease injecti-on, which are on both the stem and seat for the trunnion ball valves of DN>150mm (NPS6), and in the body cavity for the valve of DN<125mm. When the O ring of stem or the body seat ring is damaged due to accident, the medium leakage between body and stem can be prevented by injecting the sealing grease through the device.

 

Construction feature

Each seat of the ball valve can separately cut off the medium at both inlet and outlet of the valve to realize double-block functions. When the ball valve is closed, body cavity and two of the body ends can be blocked with each other even if both the inlet and outlet are under pressure, when the medium left in the body cavity might be bled through the relief valve.

 

Construction feature

Blow-out proof structure is provided with for the stem, which is positioned by the up-end cap and screw, being guaranteed not to be blown-out by the medium even if at abnormal risen pressure in the cavity.

 

 

 

 

 

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