Koreyda double offset butterfly valve represents a critical advancement for oil and gas piping and pipeline systems. Its engineered dual eccentricity—with the shaft offset from both the seat centerline and pipe center—creates a unique cam-action sealing mechanism. This design ensures the disc lifts completely away from the seat during operation, eliminating abrasive wear and providing consistent, bubble-tight shut-off even after thousands of cycles in severe service. For operators and engineers, this translates to enhanced safety margins, reduced total cost of ownership, and maximized uptime across some of the industry’s most challenging applications.
Get a Free QuoteExtreme Service Material & Design Integrity
Full Material Spectrum: Bodies and trim available in Carbon Steel (WCB, LCC), Alloy Steels (WC6, WC9), Duplex/Super Duplex (2205, 2507), Inconel 625/825, and Titanium for specific corrosive services.
High-Pressure/High-Temperature (HPHT) Design: Engineered for ASME Class 150 to Class 1500, with temperature capabilities from -196°C to +800°C using specialized metal-seated designs.
Fire-Safe Design: Standard compliance with API 607 4th Edition / ISO 10497 and API 6FA standards. Features include:
Secondary metal seal engagement in fire conditions
Graphite or thermally resilient stem seals
Anti-static device per API 608
Advanced Sealing Technology for Critical Services
Triple-Offset Design Available: For absolute zero-leakage and abrasive service (e.g., catalyst lines, CO₂ injection).
Seat Options:
Resilient Seated: High-grade RPTFE, NBR, or FKM for general hydrocarbon service.
Metal-Seated: Stellite 6, Inconel, or 316SS overlays for erosive/corrosive or high-temperature duties (e.g., flare gas, hot oil).
Laminated/Gasket Seats: Flexible graphite or spiral-wound for extreme thermal cycling.
Robust Construction for Demanding Environments
Anti-Blowout Stem: Integral stem design secured on both ends, preventing ejection under full differential pressure.
Sealed Bearing Systems: Double-sealed, lubricated bearings isolated from process media, ensuring smooth operation in sandy or slurry flows (e.g., multiphase pipelines, produced water).
Extended Body & Bonnet Designs: For insulation purposes or cryogenic service (LNG).
Abrasion-Resistant Trim: Hard-faced discs and seats for sand-laden production fluids or catalyst transfer.
Fugitive Emissions Control
Low-Emission Design: Compliant with ISO 15848-1 Class AH/BH and EPA Method 21.
Advanced Stem Sealing: Live-loaded gland packing systems (graphite, PTFE) or bellows-sealed stem options for <100 ppm leak rates.
Dual Seal Arrangements: Primary resilient seal + secondary emergency seal for critical environmental or safety-related services.
Full Compliance & Certification
Design Standards: API 609, ASME B16.34, API 6D.
NACE MR0175/MR0103: For sour service (H₂S) environments.
PED 2014/68/EU: Category III/IV for high-pressure applications.
SIL Capability: Capable of being certified for Safety Instrumented Functions (SIF) per IEC 61508.
Typical Oil & Gas Applications
Upstream (Exploration & Production):
Produced water injection and disposal
Wellhead manifold isolation
Test separator lines
Gas lift and chemical injection
Seawater injection systems (with CRA materials)
Midstream (Transportation & Storage):
Pipeline scraper traps (launcher/receiver)
Pump station isolation and bypass
Tank farm inlet/outlet
Natural gas transmission block valves
LNG loading/unloading arms
Downstream (Refining & Petrochemical):
Crude unit charge and rundown
FCCU catalyst lines (special abrasion-resistant trim)
Hydrotreater feed/effluent
Reformer and coker unit services
Flare header control and isolation
Fuel gas systems
Actuation & Automation for Modern Facilities
Fail-Safe Actuators: Pneumatic spring-return or hydraulic actuators for ESDV (Emergency Shutdown Valve) or BDV (Blowdown Valve) service.
High-Cycle & Modulating Duty: Electric or pneumatic actuators with precision positioners for continuous control (e.g., compressor anti-surge, pressure regulation).
Subsea & Offshore: Hydraulic actuated valves with ROV interfaces, qualified per API 6DSS/API 17D.
Integral Accessories: Limit switches, solenoid valves, position transmitters, and local control panels ready for integration into plant DCS/SCADA systems.
Why Koreyda is the Strategic Choice for Oil & Gas
Application-Specific Engineering: We design valves for the application, not just the specification. Our engineers understand the nuances of slug flow, sand erosion, H₂S cracking, and thermal fatigue.
Proven Track Record: Global installed base in:
Offshore platforms (North Sea, Gulf of Mexico, Brazil)
LNG liquefaction and regasification terminals
Long-distance transmission pipelines
Complex refinery turnarounds and upgrades
Lifecycle Support: From initial FAT (Factory Acceptance Testing) to field service, repair kits, and actuator retrofits, we partner with you for the operational life of the asset.
Rapid Response: Strategic inventory of critical components and valves for emergency replacement and maintenance shutdowns.
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