API 609 Triple Offset Metal-Seated Butterfly Valve, API 607 Fire-Safe Compliant for Hydrogen and CCUS Carbon Capture Industrial Facilities

I. Important Attribute and Specification Description

A. Global Standard Compliance & Product Core Definition

B. Quantified Complete Technical Performance Parameters

• Nominal Size Range: DN50 to DN2500, covering small-caliber process pipelines and large-diameter industrial main trunk pipelines
• Pressure Class Rating: ASME Class 150 to Class 900, matching medium and high-pressure green energy industrial pipeline working conditions
• Main Body Material: ASTM A216 WCB Carbon Steel, ASTM A351 CF8/CF8M Stainless Steel, Duplex Stainless Steel for harsh corrosive environments
• Disc & Seat Material: Multi-layer laminated stainless steel metal composite sealing structure, precision lapped metal hard-seal pair
• Stem Material: High-strength anti-corrosion alloy steel with anti-oxidation and anti-galling heat treatment
• End Connection Forms: Wafer type, Lug type, RF Flanged type, compatible with global standard pipeline flange installation dimensions
• Operation Modes: Manual worm gear operation, pneumatic actuation, electric actuation, hydraulic driving for automated industrial systems
• Applicable Temperature Range: -46°C to 450°C, adapting cryogenic hydrogen storage and high-temperature flue gas carbon capture working conditions
• Sealing Performance: API 598 Class VI zero-leakage tightness, bidirectional full-pressure bubble-tight shut-off
• Fire-Safe Performance: Full compliance with API 607 fire-resistant design specifications, retaining effective sealing isolation capacity after flame burning and high-temperature ablation
• Face-to-Face Dimension: Standardized dimensional specification per API 609 category B high-performance butterfly valve norms
• Structural Characteristic: Triple offset friction-free operation design, zero wear between disc and seat during repeated opening and closing

II. Manufacturing Technology and Core Product Features

A. Full Process Standardized Manufacturing & Multi-Stage Strict Quality Control Mechanism

• Raw Material Inbound Inspection & Screening: All valve body cast blanks, alloy steel stem bars, metal sealing laminates and auxiliary accessories are sampled for spectral component analysis and mechanical performance testing. Strictly screen raw material batches with qualified tensile strength, hardness, impact toughness and high-temperature stability, record full material heat number information to realize full lifecycle traceability, and return unqualified raw materials to eliminate defective source input.
• Precision Casting & Stress Relief Heat Treatment: The valve body adopts high-precision resin sand casting process to optimize internal flow channel molding, effectively reducing casting defects such as sand holes and shrinkage cavities. After casting molding, segmented temperature control annealing heat treatment is carried out to eliminate internal casting residual stress, homogenize metal grain structure, and improve the overall structural rigidity and thermal fatigue resistance of the valve body. All cast blanks undergo 100% non-destructive flaw detection to eliminate hidden cracks and internal defects.
• Five-Axis CNC Ultra-Precision Machining: Key components such as valve body sealing surface, disc conical surface, stem matching hole and flange positioning surface are processed by five-axis linkage CNC machining center with micron-level tolerance control. The metal sealing pair undergoes multi-stage fine turning and manual precision lapping treatment to achieve ultra-low surface roughness, ensuring full close fitting of the sealing surface and realizing Class VI zero-leakage sealing effect.
• Metal Sealing Assembly Pre-Compression & Aging Treatment: The multi-layer metal composite sealing ring is formed by high-temperature hot pressing and fixed-tonnage hydraulic pre-compression to eliminate structural elastic deformation. Batch sampling is carried out for high-temperature thermal cycle aging simulation tests to verify the long-term sealing stability of the metal sealing structure under repeated temperature changes and pressure fluctuations.
• Dust-Free Assembly & Full-Item Finished Product Testing: The whole valve is assembled in a constant-temperature dust-free workshop, and all fastening bolts are locked with calibrated torque wrenches to ensure uniform assembly stress. After assembly, all finished valves complete shell hydrostatic test, seat tightness test, full-stroke cycle endurance test and API 607 fire-safe simulation test. Only fully qualified products are subjected to anti-corrosion coating and standardized export packaging before shipment.

B. Distinctive Core Structural Product Features

• Friction-Free Triple Offset Mechanical Structure: The three-dimensional offset design realizes zero friction between disc and seat during opening and closing strokes, completely avoiding sealing surface wear and failure caused by long-term mechanical friction, greatly extending the service life of the valve sealing system.
• API 607 Certified Full Fire-Safe Performance: Optimized fire-resistant structural layout and all-metal sealing configuration ensure that the valve can still maintain effective pipeline isolation after fire ablation and high-temperature impact, eliminating flammable medium leakage risks and meeting green energy project safety standards.
• Bidirectional Zero-Leakage Metal Hard Sealing: Precision lapped metal sealing pair realizes bidirectional Class VI bubble-tight shut-off, which is far superior to ordinary soft-seal butterfly valves in high-temperature, high-pressure and corrosive medium environments, avoiding medium leakage and energy loss.
• Wide Temperature and Pressure Adaptation Range: The all-metal structure stably adapts to low-temperature cryogenic hydrogen storage and high-temperature flue gas carbon capture working conditions, covering diversified extreme temperature scenarios of new energy industrial production.
• Modular Multi-Mode Driving Design: Compatible with manual, pneumatic, electric and hydraulic driving modes, supporting automatic linkage control of industrial pipeline systems, adapting to manual on-site operation and intelligent unmanned factory management modes.
• Standardized Universal Installation Structure: Wafer, lug and flange multi-end connection forms are compatible with global standard pipeline flanges, realizing rapid installation and replacement, reducing pipeline construction and maintenance costs.
• High Anti-Corrosion & Anti-Oxidation Performance: High-grade alloy steel and stainless steel materials are matched with surface anti-oxidation treatment, resisting erosion of hydrogen, carbon dioxide, industrial flue gas and other media, adapting to long-term harsh industrial service environments.
• Authoritative Global Certification Endorsement: The whole production system passes ISO9001 quality system certification, and the product meets API 609 and API 607 standard specifications, fully satisfying international green energy project procurement and market access requirements.

III. Comprehensive Multi-Dimensional Product Competitive Advantages

• Unique Friction-Free Structure Reduces Long-Term Maintenance Costs: Different from traditional butterfly valves that rely on soft seal compression and are prone to wear and leakage, the triple offset friction-free design eliminates sealing wear loss, reduces valve replacement and maintenance frequency by more than 70%, and greatly cuts the daily operation and maintenance cost of green energy industrial pipelines.
• Professional Fire-Safe Design Guarantees New Energy Pipeline Safety: Hydrogen and CCUS industrial media have flammable, explosive and high-risk characteristics. The API 607 fire-safe structure can effectively block medium leakage in case of pipeline fire accidents, avoid safety accidents such as combustion and explosion, and provide core safety guarantee for low-carbon energy projects.
• Extreme Working Condition Adaptability Leads Ordinary Butterfly Valves: All-metal hard-seal structure abandons the temperature resistance limitation of non-metallic materials, stably operating in ultra-low temperature hydrogen storage and high-temperature carbon capture flue gas environments, solving the problem that ordinary butterfly valves are difficult to adapt to new energy extreme working conditions.
• Zero-Leakage Performance Reduces Green Energy Medium Loss: Class VI bidirectional zero-leakage sealing performance effectively avoids leakage loss of high-purity hydrogen, carbon dioxide and other valuable new energy media, improves resource utilization rate for enterprises, and meets global low-carbon emission reduction policy requirements.

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• Long Service Life Reduces Full Lifecycle Operation Cost: Benefiting from friction-free operation and wear-resistant metal sealing structure, the valve maintains stable performance for more than 12 years under standard working conditions, far exceeding the service life of ordinary soft-seal butterfly valves, reducing enterprise spare parts reserve capital occupation and pipeline shutdown loss.
• High Compatibility Improves Project Construction Efficiency: Universal standard installation size and multi-mode driving configuration are compatible with most green energy industrial pipeline systems, supporting rapid pipeline transformation and new project construction, shortening project construction cycle and improving engineering efficiency.
• Stable Thermal Cycle Resistance Adapts Continuous Industrial Production: The metal composite sealing structure has excellent thermal deformation resistance, can withstand long-term repeated high and low temperature alternating cycles, no sealing failure or medium leakage occurs in continuous industrial production, ensuring stable operation of green energy production lines.
• Low Flow Resistance Optimizes Industrial Pipeline Energy Consumption: Optimized streamlined disc structure reduces pipeline fluid turbulence and flow resistance, effectively reducing the operating power consumption of medium transmission equipment such as fans and pumps in CCUS and hydrogen energy projects, helping enterprises reduce energy consumption and achieve low-carbon production.

IV. Global Multi-Industry Industrial Application Scopes

• Hydrogen Energy Production & Storage Industry: Extensively used in hydrogen production workshop process pipelines, high-purity hydrogen transmission trunk lines and cryogenic hydrogen storage tank isolation pipelines. The friction-free metal sealing structure avoids impurity pollution to high-purity hydrogen medium, and fire-safe design eliminates hydrogen leakage and combustion risks, ensuring safe and stable operation of hydrogen energy industrial systems.
• CCUS Carbon Capture & Sequestration Projects: Applied in industrial flue gas carbon capture pipelines, carbon dioxide compression transmission pipelines and carbon storage device isolation systems. It adapts to high-temperature flue gas and high-pressure carbon dioxide medium working conditions, stably isolates pipeline media, reduces carbon capture system operation failure rate, and supports industrial low-carbon emission reduction transformation.
• Thermal Power Plant Low-Carbon Renovation Engineering: Deployed in power plant flue gas desulfurization and denitrification pipelines, waste heat recovery pipelines and carbon capture supporting pipelines. High temperature resistance and fire safety performance adapt to power plant high-temperature flue gas working conditions, zero-leakage performance avoids flue gas leakage pollution, and helps thermal power plants complete low-carbon environmental protection renovation.
• Petrochemical Low-Carbon Process System: Used in petrochemical plant tail gas recovery pipelines, hydrocarbon medium transmission pipelines and environmental protection emission pipelines. Fire-safe design adapts flammable hydrocarbon medium working conditions, anti-corrosion metal structure resists chemical medium erosion, and stable isolation performance ensures safe and efficient operation of petrochemical low-carbon production lines.
• Industrial Waste Gas Treatment & Environmental Protection Engineering: Adopted in industrial factory waste gas collection pipelines, tail gas purification transmission pipelines and waste gas discharge control systems. Wide temperature adaptation range meets diversified waste gas treatment working conditions, zero-leakage performance prevents toxic and harmful gas leakage, and meets strict global industrial environmental protection emission standards.
• New Energy Chemical Industrial Park Pipeline Network: Selected for comprehensive pipeline isolation of green chemical parks such as hydrogen energy chemical synthesis and carbon dioxide utilization. Modular multi-drive design adapts intelligent pipeline management requirements, stable extreme working condition performance meets long-term continuous operation demands of industrial parks, and supports large-scale development of green chemical industry.
• Offshore New Energy Supporting Facilities: Applied in offshore wind power supporting hydrogen production pipelines and offshore carbon capture auxiliary pipelines. High structural rigidity and anti-corrosion performance adapt offshore humid and salt fog harsh environments, fire-safe zero-leakage design guarantees offshore equipment operation safety, and adapts offshore new energy project construction standards.