DOUBLE OFFSET TRIPLE OFFSET BUTTERFLY VALVE High-Performance Sealing

The DOUBLE OFFSET TRIPLE OFFSET BUTTERFLY VALVE is an advanced high-performance quarter-turn valve designed for critical shut-off, high-pressure isolation, and severe service applications across marine, offshore, and petrochemical fluid networks. Built to eliminate seat friction and minimize wear, offset disk geometry ensures low operating torque, bubble-tight sealing, and extended service life under extreme temperature and pressure cycles.

Engineered in strict compliance with international manufacturing standards—including API 609, AWWA C-504, BS 5155, and JIS 10K—the DOUBLE OFFSET TRIPLE OFFSET BUTTERFLY VALVE undergoes rigorous testing per API 598 and BS 6755 standards. Available in nominal pipe sizes up to 500 mm (with custom dimensions above 500 mm supplied directly via Voyage Marine Automation), it can be supplied in high-grade marine alloys and configured with manual, electric, hydraulic, or pneumatic actuation.

Key Features of the DOUBLE OFFSET TRIPLE OFFSET BUTTERFLY VALVE

• Advanced Eccentric Geometry:

  • Double Offset (High Performance): Reduces disk-to-seat friction during rotation, preserving seal integrity and reducing required torque.

  • Triple Offset (Zero Leakage): Features a third angular offset that eliminates friction entirely until final seating contact, providing true metal-to-metal bubble-tight shut-off.

• Global Standard Compliance: Manufactured to API 609, AWWA C-504, BS 5155, and JIS 10K standards for global interchangeability.

• Dual Pressure Testing Standards: Certified under API 598 and BS 6755 for shell strength and seat tightness under high pressure differential.

• Versatile Drive Configurations: Compatible with manual handwheels/gearboxes, single-phase and three-phase electric actuators, hydraulic power units, and pneumatic control drives.

• Corrosion-Resistant Alloys: Available in Nickel Aluminium Bronze (NAB) and Gunmetal (GM) for seawater service, as well as CF8 and CF8M stainless steel for aggressive media.

• Extensive Size Range: Standard sizing available up to 500 mm, with requirements exceeding 500 mm handled directly by Voyage Marine Automation.

Primary Applications

• Marine & Shipbuilding: Seawater ballast management, main propulsion cooling loops, sea chest valves, and cargo oil manifolds

• Offshore & Subsea: High-pressure seawater injection systems, firemain headers, and FPSO topside process lines

• Power & Chemical Processing: Steam isolation, hydrocarbon handling, water desalination intake, and cryogenic fluid transfer

Technical Specifications

Package Contents

• 1 × DOUBLE OFFSET TRIPLE OFFSET BUTTERFLY VALVE Unit (specified size & actuation model)

• Actuator / Gearbox Drive Adapter Assembly

• API 598 & BS 6755 Factory Pressure Test Certificate