Industrial ball valves

Floating ball valves have the ball suspended by the seats, with inlet pressure pushing it against the downstream seat for sealing. They’re suitable for smaller sizes (typically ≤6″) and lower pressures (up to Class 600).

Trunnion mounted ball valves have the ball mechanically anchored at top and bottom. This design is used for larger sizes (>6″) and higher pressures (Class 900+), as it prevents seat deformation and reduces operating torque significantly.

While ball valves can throttle, they’re primarily designed for on-off service. Standard ball valves in partially open positions can experience turbulence and seat wear. For throttling, consider:

• V-port ball valves with characterized flow
• Globe valves for better throttling control
• Control valves for precision flow regulation

Pressure rating depends on your system’s maximum working pressure and temperature. Common ratings:

• Class 150: Up to 285 psi at ambient temp (water distribution, low-pressure applications)
• Class 300: Up to 740 psi (general industrial)
• Class 600: Up to 1480 psi (high-pressure oil & gas)
• Class 900/1500: For very high-pressure applications

Always consult pressure-temperature charts and consider safety margins.

Carbon Steel (WCB): General purpose, economical, for non-corrosive fluids
Stainless Steel (CF8M/316): Corrosion resistance, food/pharma, chemical applications
Bronze/Brass: Small sizes, water service, dezincification resistant
Exotic Alloys: Extreme temperatures, highly corrosive environments

Consider: fluid chemistry, temperature, pressure, and local regulations.

Fire-safe valves are tested to API 607 or API 6FA standards, proving they can maintain seal integrity during and after fire exposure. This is critical for:

• Oil & gas facilities where hydrocarbon fire risk exists
• Refineries and petrochemical plants
• Offshore platforms
• Pipeline systems handling flammable fluids

Fire-safe valves use metal seats or graphite backup seals that engage when soft seats fail due to fire.