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Costa di Mezzate (BG) 24060, ITALY



Starline manufactures a complete line of ball valves in according to API 6A.

They are available in an extensive range of designs, materials, sizes and pressure classes and are in full conformance with API and NACE specifications.

Starline uses only high quality forged materials inspected & tested to International Standards and utilizes advanced manufacturing technology with special emphasis on safety, quality, and long service life of products.

The forging material can ensure the best rigidity and strength.


  • Standard seat design is single piston effect. Double piston effect sealing barrier available on request
  • Anti-Blow Out stem design
  • Antistatic device
  • Valve designs are available to meet Pressure Product Requirement levels PSL-1, PSL-2, PSL-3 / PSL-3G and PSL-4
  • Modular double block and bleed valves (two ball and a needle system) according to API 6A are available on request


Starline uses the FEA
for designing its API 6A ball valves.

Finite Element Analysis
(FEA) is a very important
step of the development
phase and ensures the
best possible performance

Valves operational problems,
pressure/temperature related
deformations and flow related
forces within a valve can be evaluated.


Download API6A Ball Valve Catalogue

Size: 7.87 MB

Size: 1.58 MB

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