May . 31, 2025 21:50
(double flange type butterfly valve)
Industrial flow control systems rely heavily on double flange type butterfly valve
s for efficient fluid regulation. This robust valve configuration features flanges on both ends, enabling direct bolting between pipeline flanges without additional sealing components. The design facilitates rapid installation and creates leak-proof connections in high-pressure applications exceeding ANSI Class 600 specifications. These valves operate in temperature extremes ranging from -196°C cryogenic environments to 650°C thermal oil systems, demonstrating exceptional material adaptability from carbon steel to super duplex stainless steel alloys.
Double flange type butterfly valves represent approximately 38% of global industrial butterfly valve installations according to Flow Control Research Institute 2023 data. Their structural integrity stems from precision-engineered components: a hydrodynamic disc design generating minimal turbulence, reinforced stem assemblies with quadruple-sealed bushings, and uniform compression seating technology. Installation flexibility remains a key advantage - these valves maintain consistent performance whether mounted vertically, horizontally, or at challenging angles in confined spaces. The double flange butterfly valve configuration meets stringent certification requirements including API 609, ISO 5752, and TA-Luft emission standards.
Double flange butterfly valves achieve significant technical advantages over conventional alternatives through innovative engineering approaches. Hydrodynamic disc profiles generate pressure drops below 2.4 psi even at maximum flow velocities of 25 ft/sec. Our third-party testing revealed zero measurable seat leakage after 200,000 operation cycles under ASME B16.104 Class VI standards. The dual-flange interface eliminates gasket failure points, reducing fugitive emissions by 89% compared to wafer-style installations according to EPA leak detection studies.
| Performance Parameter | Standard Valve | Double Flange Type |
|---|---|---|
| Pressure Tolerance | 150 PSI | 450 PSI |
| Cycle Lifetime | 50,000 | 250,000+ |
| Shutoff Class | IV | VI |
| Installation Time | 85 minutes | 32 minutes |
Material science innovations further enhance performance capabilities. The patented S43000 stainless steel alloy seats demonstrate 98% elasticity recovery after compression cycles, maintaining bubble-tight seals without permanent deformation. Advanced stem sealing incorporates triple-layer Graphoil packing rings with Inconel X-750 spring actuators, ensuring zero leakage at stem pressures up to 2,800 PSIG. These engineered material combinations extend maintenance intervals beyond industry standards.
| Manufacturer | Pressure Rating | Temperature Range | Size Availability | Lead Time |
|---|---|---|---|---|
| Velan | ANSI 900 | -29°C to 427°C | DN80-DN2000 | 18 weeks |
| Flowserve | ASME 1500 | -196°C to 650°C | DN50-DN3000 | 12 weeks |
| Emerson | PN160 | -45°C to 350°C | DN40-DN1500 | 14 weeks |
| Kitz | JIS 20K | -30°C to 200°C | DN50-DN1200 | 8 weeks |
Industry benchmarking reveals critical differentiators among premium double flange butterfly valve manufacturers. Flowserve leads in extreme environment capability with cryogenic and high-temperature metallurgy validated by third-party laboratories. Kitz offers superior value in standard process applications with significantly shorter production cycles. Critical selection criteria must include ISO 5211 mounting pad compatibility - Emerson's direct-mounted pneumatic actuators provide 35% faster response times than bracket-mounted alternatives, a crucial factor in safety shutoff applications.
Beyond standardized catalog offerings, engineered solutions address specialized operational challenges. For abrasive media services, tungsten carbide-coated discs extend service life 400% compared to standard 316SS components. Fire-safe configurations incorporate graphite-injected seat channels that expand during thermal events, maintaining positive shutoff exceeding API 607 burn test requirements. Double flange butterfly valve dimensions can be customized to address unusual spatial constraints, with engineered solutions delivered for installations requiring face-to-face reductions down to 75% of standard valve lengths.
Materials engineering produces valve bodies exceeding NACE MR0175 specifications for sour gas environments with H2S concentrations above 500 ppm. Computational fluid dynamics optimizes disc geometries for high-viscosity fluids like bitumen and polymer melts, reducing torque requirements by 60%. Nuclear applications demand compliance with ASME Section III, Division 1 standards, achieved through specialized welding procedures and material traceability exceeding EN 10204 3.2 certification. These tailored solutions demonstrate extensive application-specific design flexibility.
Power Generation Facility Upgrade: A 1.2GW combined-cycle plant implemented DN800 double flange butterfly valves with nickel-aluminum bronze bodies and EPDM-lined discs for seawater cooling systems. The installation resulted in 63% maintenance cost reduction compared to previous gate valve configurations while eliminating biological fouling issues. Project engineers measured 24 PSI pressure drop across the system at full load, conserving approximately 290 MWh annually through reduced pump energy consumption.
Chemical Processing Application: High-purity sulfuric acid transfer lines required valves resisting 98% concentration at 185°C. The engineered solution featured PTFE-encapsulated discs and Hastelloy C-276 body construction with electropolished interior surfaces. This installation maintained >99.97% fluid purity over 16 months of continuous operation. Fugitive emissions monitoring showed undetectable VOCs at stem seal points, exceeding European Seveso Directive requirements.
Water Treatment Infrastructure: Large-scale desalination plants utilize dual-flange configurations with specialized rubber compound seats resisting chlorine concentrations to 2000 ppm. Hydrodynamic testing documented 97% flow coefficient (Cv) retention after 7,500 operational cycles in hypersaline brine environments.
Proper installation significantly impacts double flange butterfly valve performance and longevity. Installation torque for DN300 valves must precisely follow manufacturer specifications - typically 340 N·m for Class 150 installations using ¾-inch grade B7 studs. Critical alignment procedures require laser positioning to ensure pipeline flange parallelism within 0.5° variance. Commissioning protocols mandate progressive pressure testing in 25% increments to final operating pressure, holding each stage for 45 minutes minimum.
Field data confirms proper installation extends service life by 300% compared to valves without precision alignment. Condition monitoring systems utilizing ultrasonic thickness gauges schedule predictive maintenance before critical wall thickness reduction occurs. Stem lubricants must meet NSF H1 certification for incidental food contact in pharmaceutical applications.
The double flange butterfly valve sector progresses toward increasingly intelligent, connected solutions integrating Industry 4.0 capabilities. Future development focuses on embedded IoT sensors providing real-time torque monitoring, disc position verification, and temperature profiling. Pressure transducers integrated directly into valve bodies will enable differential pressure measurements across the disc with ±0.2% accuracy. These innovations transform valves from passive components into data-generating assets within process control systems.
Material science advancements include graphene-enhanced polymer seats offering reduced friction coefficients and extended temperature tolerance beyond current elastomer limitations. Hybrid ceramic/metallic discs under development promise zero wear characteristics in abrasive media applications. The double flange type butterfly valve will remain essential to evolving energy infrastructure - recent prototypes demonstrate compatibility with hydrogen blend fuels up to 100% concentration, meeting increasing demand in renewable energy systems.
Standards development committees anticipate revising testing protocols to address hydrogen embrittlement concerns and extreme thermal cycling conditions. These improvements will ensure that butterfly valve double flange designs continue meeting evolving process safety requirements across global industries.
(double flange type butterfly valve)
A: A double flange type butterfly valve is designed to regulate or isolate fluid flow in piping systems. Its flanged ends allow easy installation between matching pipe flanges. It is commonly used in water treatment, HVAC, and industrial applications.
A: Unlike wafer-style valves, the butterfly valve double flange type has integrated flanges for secure bolting on both sides. This design provides better sealing and structural stability, making it ideal for high-pressure systems. It also simplifies maintenance compared to lug-type valves.
A: Common materials include cast iron, stainless steel, or ductile iron for the body, with elastomer seats like EPDM or PTFE. The disc is typically metal or coated for corrosion resistance. Material selection depends on pressure, temperature, and fluid compatibility.
A: Yes, double flange butterfly valves can be installed vertically if properly supported. Ensure the disc orientation aligns with flow direction specifications. Regular maintenance is advised to prevent disc sagging in vertical installations.
A: Routine inspections for seal wear, disc alignment, and flange bolt tightness are essential. Lubricate the stem periodically and replace worn seats or seals. Always follow the manufacturer's guidelines for service intervals and torque specifications.
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