HARTMANN Ball valves type AST

Ball valves type AST are intended for use as high pressure valves. Hartmann has designed them with a unique and full metallic sealing system, which works as sealing of shutoff valves for both liquids and gaseous media with elements of solid particles. The main features of this solid construction are outlined below.

Technical characteristics:

Construction according to DGRL 97/23 / EG, API 6D or API 6A

Full metallic seal

Two and three-piece body made of forged material

Trunnion mounted ball

Float-mounted, self-centering seat rings with pre-tensioned spring elements

Sealing force dependent on pipeline pressure

Double Block and Bleed (DBB)

Ability to exchange of upper spindle seal at full pressure in pipeline

Antistatic construction

Fire safe according to API 6 FA or BS 6755/2

Maintenance free

Optional parameters to choose from:

Double Piston Effect (DPE) system

Made of materials specially selected for extreme applications

Soft seal

With and without drainage and ventilation connections

Additional drain valves with metal seal

As reduced bore ball valves

With special internal or external coatings

For underground work with extended stem up to 6 meters in length

With electric, pneumatic, or electro-hydraulic actuators

Made on order for your specific application

Production range:

DGRL 97/23 / EG and API 6D:

DN 50 – DN 450 (2 “- 18”) up to PN 420 ANSI (2500)

DN 500 – DN 700 (20 “- 28”) up to PN 250 (ANSI 1500)

DN 1000 (40 “) up to PN 150 (ANSI 900)

Additional nominal dimensions and pressure levels are available on request!

API 6A

2 1/16 “- 7 1/16” up to API 10.000

9 “- 11″ x 10 ” up to API 5.000

13 5/8 “- 16 3/4″up to API 3.000

PSL 1 – PSL 3G

Temperature class K – Y