Ball valves are selected for fast, reliable on/off isolation service where quarter-turn operation, minimal pressure drop, and compact installation are required. The spherical ball with full-bore or reduced-bore design provides tight shut-off and low flow resistance, making ball valves the standard specification for pipeline isolation, process plant automation, and emergency shut-down service across oil & gas, petrochemical, marine, and general industrial applications.

Floating ball valves are selected for smaller bore and lower pressure service at Class 150–600, where the ball is pressure-seated against the downstream seat — providing bubble-tight shut-off in a simple, lightweight construction suitable for general process, utility, and marine service. Trunnion mounted ball valves are specified for larger bore and higher pressure applications at Class 300 and above, where the trunnion support transfers pipeline pressure loads from the seats to the bearings — reducing operating torque and extending seat life under high differential pressure. Fully welded ball valves are the standard specification for buried pipelines, gas transmission mains, and district heating systems where the one-piece welded body eliminates all external leakage paths and minimizes long-term maintenance requirements.

Aluminum bronze (C95300, C95800) body construction is selected for seawater cooling, ballast water, fire suppression, and marine utility service where carbon steel and stainless steel cannot provide adequate resistance to seawater corrosion, cavitation erosion, and biofouling. The non-sparking properties of aluminum bronze make it the preferred material for hazardous area installations on marine vessels and offshore platforms. Soft seats (PTFE, RPTFE) are standard for general process and marine service up to 200°C, with metal seats selected for high-temperature, erosive, and high-cycle applications where soft seat materials would fail prematurely.