Top entry ball valves forged or cast material engineered for heavy duty, maintenance-free performance. Flanged ends to ASME B16.5, welded ends to ASME B16.25 or clamp type, face to face to ASME B16.10. Design and construction in accordance to ASME B16.34, API 6D and ISO 17292. Fire safe certified to API 607. Vent and drain connections as requested by international standard or customer specifications.