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Rdn300 Double Flange Eccentric Butterfly Valve1
Valve, Flanged Eccentric Butterfly Valve, Double Offset Type Butterfly Valve
Hebei Yaofa Pipe Industry Technology Development Co., Ltd
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Product DescriptionIntroductionStructural Features & Working Principle1. Double Eccentric DesignFirst Eccentricity: The valve stem axis offsets from the disc center, reducing friction during operation and minimizing wear on the seals.Second Eccentricity: The disc center offsets from the seat’s center, creating a "progressive contact" seal. When the disc rotates (90° travel), it first disengages the seat, then moves parallel to its surface, eliminating wear and ensuring tight sealing with low torque.2.Advantages 1. Superior Sealing PerformanceDouble eccentricity prevents seat-disc rubbing, achieving bubble-tight sealing (zero leakage) in both directions, even under low pressures (e.g., ≤0.1 MPa).Elastomeric seats offer exceptional sealing for clean fluids; metal seats are ideal for dusty or slightly abrasive media. 2. Low Operating Torque Reduced friction from the eccentric design decreases opening/closing torque by 30–50% compared to single-eccentric or concentric valves, allowing for smaller actuators and energy savings.3. Durability & Longevity Cast iron body withstands corrosion in non-acidic environments, while the disc-seat design minimizes wear, extending service life to over 100,000 cycles. 4. Compact & LightweightWafer or flanged design (shorter face-to-face length than gate/globe valves) conserves space and cuts installation costs.Applications? Municipal Water & Wastewater: Isolation and regulation in pipelines, pump stations, and treatment facilities.? Industrial Processes: Control of air, steam, and non-corrosive fluids in HVAC, food processing, and light industrial systems.? Power Generation: Cooling water systems and condensate lines in thermal power facilities.? Marine Engineering: Ballast water and seawater systems (with corrosion-resistant coatings). Technical SpecificationsSpecificationStandards Compliance Design & Manufacturing:Chinese GB/T 12238 (butterfly valves), API 609, DIN 3354 (butterfly valve structure).Flange Dimensions:ANSI B16.5 (Class 150), DIN EN 1092-2 (PN10/16), GB/T 9113 (Chinese flanges), GOST 33259 (Russian flanges).Testing: Hydrostatic test: 1.5x nominal pressure (GB/T 13927, API 598).Leakage test: Bubble-tight seal per ISO 5208 (FCI 70-2 Class VI for elastomeric seats).Packing LoadedTransportationDrawings & DimensionsAccess detailed CAD drawings and dimensional diagrams for download here or inquire for more. Our team offers custom designs for specific projects.After Sales ServiceStandard Warranty: 18 months after goods are received.Global Support: 24/7 technical help and spare parts supply.Why Choose Us?Other ProductsOEM/ODM capabilitiesCompetitive pricing & bulk discountsFast shipping & customs clearance supportTurnkey project solutionsglobe valvecheck valvestrainerflangesball valveFAQQ: What’s the lead time for orders?A: Standard models ship in 15–30 days; custom units take 30–45 days.Q: Do you provide after-sales service overseas?A: Yes, we have partnered service centers globally.Q: Can I request a customized bucket size?A: Absolutely! Tailored attachments are available.Q: What documents do you provide for export?A: Full export package (Invoice, Packing List, Bill of Lading, COC, etc.).Q: How do I place an order?A: Contact us via email/phone for a quote, then confirm with a PO.
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