RISING STEM BALL VALVES API6A & API6D
Construction
Standard features
· NO Double Piston Effect (DIB): Process application when required a mechanical energized metal or soft seat prevents loss from process contamination or material leakage.
· Stem that is separated from the ball, delivering an force on Helix contour design to axis free trunnion .
· Large-diameter, axis free trunnions that reduce unit bearing loads and operating torque.
· Primary metal-to-metal seal.
· Antistatic device no needed.
· No need for API6D Body relief valve for overpressure due to liquid thermal expansion.
· Bolted construction Top entry that permits disassembly in the field for repairs.
· Double-barrier stem seals
· Nickel/TCC HVOF coating for trim parts.
· Trunnion-mounted ball for ease of operation at high pressure.
· Automation with fail-safe close or fail-safe open
Design | API6A, API 6D, |
Face to Face dimensions | API6A / API 6D, ASME B16.10 |
Flanges | ASME B16.5, B16.25, ASME B16.47 |
Fire Safe | ISO 10497, API 607, BS 6755 |
Fugitive Emission | ISO 15848, TÜV, Shell MESC SPE 77-312 |
Testing | API6A, API 598, API6D, ISO 5208 |
Marking | CE, API6A, API6D |
Topworks | ISO 5210 |
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