Velan, Inc. Cryogenic Triple-offset Valves

Bidirectional, zero-leakage, triple-offset butterfly valves Features and benefits DESIGN FEATURES: • Triple-offset disc rotation: Provides bubble-tight sealing without rubbing or galling. • Cryogenic stem packing: Composed of superposed Viton O-rings and expanded graphite rings (fire safe approved). • Low fugitive emissions: in accordance with ISO 15848/Ta-Luft. • No cavity: No cavity to prevent build-up of solids. • Drainage possibility: The bottom cover can be removed if drainage is required. • Internal blow-out protection: Prevents the shaft from blowing out under pressure. • Inherent fire safe function: Stainless steel construction and metallic seal provide inherent fire safe function. • Extended bonnet: With a sufficient gas column to keep the stem packing away from cold fluid. Extended bonnet length is qualified for use in LNG application with type approvals from major classification societies. • Actuator: Manual, pneumatic (single or double-acting type), electric or hydraulic according to customer specification. ON/OFF or MODULATING function according to the application. Fast-acting actuators for Emergency Shut Down (ESD) also available. • High quality castings: Radiographic control, dye penetrant test, ferrite content control, impact test at -196°C according to customers' requirements. • Reinforced stainless steel shaft bearings: For high cycles and smooth operation at very low temperatures. • High reliability: Safety Integrity Level requirements according to IEC 61508.