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KSB Ball Valve Carbon Steel Class 150/300 Flanged

ECOLINE BLT-S/BLD-S. WCB body, CF8M ball, PTFE seat. Fire-safe API 607. 2-piece and 3-piece. Trunnion from NPS 8. Full and reduced bore. NPS ½–16. IBR certified.

Carbon Steel WCBClass 150, 300NPS ½–16IBR

Specifications

ParameterSpecification
SeriesECOLINE BLT-S / BLD-S
Body MaterialA216 WCB body, A351 CF8M ball and stem
Pressure ClassClass 150, 300
Size RangeNPS ½–16
Max Temperature200°C (PTFE seat limit)
Max Pressure51 bar (740 psi)
Design StandardEN ISO 17292
End ConnectionsFlanged (ASME B16.5)
ConstructionAnti-blowout stem, anti-static device, fire-safe API 607
Trim / SealingPTFE (standard), RPTFE, PEEK available
✓ IBR✓ EN ISO 17292

Material & Applications

Why Carbon Steel WCB: WCB body with CF8M (SS 316) ball and stem provides corrosion-resistant internals with cost-effective carbon steel body. PTFE seat for clean service up to 200°C. RPTFE extends to 260°C. PEEK for abrasive or high-temperature service.

Typical applications: Process isolation, pipeline on-off service, tank farm, general utility. Fire-safe for oil & gas and refinery applications. Full bore for pigging. Reduced bore for cost-effective isolation.

Pressure/Temperature Ratings

RatingPressure at Temperature
Cl 15020 bar @ 38°C17 bar @ 100°C14 bar @ 200°C
Cl 30051 bar @ 38°C45 bar @ 100°C40 bar @ 200°C

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Other Variants

SS CF8M Flanged Compact Class 400/800 Trunnion Mounted NPS 8+ All Ball Valves →

Service Area

Pune, Ahmednagar & Beed.

Carbon Steel WCB Ball Valve FAQs

What does fire-safe mean?
Fire-safe to API 607 means the valve has a metal-to-metal backup seal that activates if the soft PTFE seat is damaged by fire. The valve maintains shut-off integrity during and after a fire event. Essential for oil & gas and refinery applications.
Trunnion vs floating ball?
Floating ball: ball moves toward downstream seat under pressure, creating seal. Simple and cost-effective for small sizes. Trunnion: ball is fixed on trunnions, spring-loaded seats move to create seal. Better for large sizes (NPS 8+) where the ball is too heavy to float. KSB uses trunnion from NPS 8 and above.
What is anti-blowout stem?
The stem is designed so that internal pressure cannot push it out of the body. A retaining mechanism ensures the stem stays in place even if the stem seal fails. This is a safety feature required by most process piping specifications.
Full bore vs reduced bore?
Full bore: internal bore matches the pipe ID, providing unrestricted flow with minimum pressure drop. Required for pigging and inline inspection. Reduced bore: smaller internal bore, lower cost, slightly higher pressure drop. Adequate for most on-off isolation applications.

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