Ball Valve Type AST

Why do our ball valves have a metal-to-metal sealing system?

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Ball Valve Type AST

HARTMANN VALVES valves of the AST series are designed for use as high-pressure valves. With our unique and entirely metallic sealing systems they are equally suitable as reliably sealing shut-off valves for liquid as well as gaseous media with solid particle components.


Information sheet Ball Valves
Video: Metallic sealing system
  • Technical characteristics
    • Design according to DGRL 2014/68/EU, API 6D or API 6A
    • Entirely metallic sealing
    • O-bubble leak rate
    • Two- and three part housings (split body) made of forged material
    • Trunnion-mounted ball
    • Blowout-safe operating spindle
    • Float-mounted, self-centering seat rings with pre-tensioned spring elements
    • Automatic housing pressure relief
    • Sealing force dependent on line pressure
    • Double Block and Bleed (DBB)
    • Exchangeability of upper operating spindle seal at full line pressure
    • No electrostatic charge-up
    • Fire safe according to DIN EN ISO 10497 / API 607
    • Maintenance free
  • Optional Design

    Upon request we manufacture and deliver the ball valves of the AST series for you:

    • with Double Piston Effect (DIB)
    • made of special materials for extreme application areas
    • soft sealing
    • with and without drainage and ventilation connections
    • with purely metallically sealing drainage ball valves
    • as reduced bore ball valves
    • with special interior and exterior coatings
    • for underground use with a shaft extension of up to 6 meters Length
    • with electric, pneumatic, or electro-hydraulic drives
    • fail-safe close or fail-safe open
    • as a special design for your special application case
  • Manufacturing program

    DGRL 2014/68/EU und API 6D:
    DN 25 – DN 300 (1“ – 12“) bis PN 420 (ANSI 2500)
    further nominal widths and pressure stages on request!

    API 6A:
    1 13/16“ – 7 1/16“ bis API 10.000
    9“ – 11“ x 10“ bis API 5.000
    13 5/8“ – 16 3/4″ bis API 3.000
    PSL 1 – PSL 3G
    Temp. Class K – Y

    further nominal widths and pressure stages on request!

References
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Find out which customers use our ball valves successfully.

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