Explore our elite portfolio of standard and customized engineering valves, crafted specifically to support critical industrial applications.
In the matrix of modern industrial liquid management, the double flange butterfly valve is recognized as a cornerstone. Renowned for its structural integrity, high reliability under varying pressure levels, and overall spatial efficiency, this specialized device acts as a primary control tool in heavy duty pipe frameworks worldwide. From deep-sea desalination lines to high-pressure municipal water mains, industrial plants demand flow solutions that guarantee structural rigidity and ease of maintenance. Double flanged designs deliver exactly that by bolting directly to matching pipeline flanges, eliminating downstream tensile stress and offering secure bidirectional sealing.
The global industrial footprint of double flange butterfly valves has expanded heavily over the past two decades. As urban populations rise and global environmental standards tighten, public utilities and private manufacturers are under extreme pressure to limit fluid leakage and energy loss. Traditional gate valves and bulkier ball valves are increasingly being replaced by engineered double-eccentric and triple-eccentric double flange butterfly valves. These modern options offer not only a lighter footprint and quicker quarter-turn actuation, but also significantly reduced torque requirements, lowering the overall cost of motorized and pneumatic actuation systems.
“Information Gain Advantage: Unlike standard wafer or lug type valves, double flange valves provide full structural anchoring on both sides of the pipeline connection. This enables safe downstream piping dismantling while maintaining upstream system pressure, a critical requirement for continuous process factories and emergency safety shutdowns.”
KR brings over 20 years of proven manufacturing experience to the international valve sector. Specializing in the end-to-end design, casting, machining, assembly, and testing of standard and non-standard valves, we support critical operations in more than 50 countries and regions. Our engineering portfolio spans more than 500 valve designs, including high-performance double flange butterfly valves, resilient seated gate valves, dual-disc check valves, automatic air release valves, Y-type strainers, and complex hydraulic water control valves.
Our global operations are anchored by our core manufacturing philosophy: high repeat purchase rates are earned through absolute quality consistency and mutual benefit. Our complete engineering facility features state-of-the-art tooling, including 15 high-precision CNC machining centers, automatic sandblasting lines, electrostatic powder coating systems, and advanced pressure testing bays. Whether fulfilling orders for standard municipal specifications or fabricating tailor-made alloy valves for corrosive chemical processes, we guarantee zero-leakage performance under strict international standards.
How our integrated design, production, and inspection divisions collaborate to guarantee zero-leakage valve shipments.
Our dedicated R&D department continuously engineers new structural enhancements. Using finite element analysis (FEA) and computational fluid dynamics (CFD), we optimize body wall thickness and disk geometries to minimize flow resistance, lower dynamic torque, and extend service life.
Operating strictly under ISO 9001 quality management, our factory coordinates custom production plans to ensure reliable lead times. With over 30 advanced production machines and a rolling monthly inventory strategy, we consistently meet urgent project delivery requirements.
Our absolute rule is zero leakage. The quality assurance department carries out a strict series of inspections on physical dimensions, cosmetic integrity, material composition, and shell/seat pressure tests in complete compliance with international standards, delivering certified assurance reports with every batch.
Why procurement managers, EPC contractors, and global valve distributors trust KR as their supply chain partner.
We supply products under our own registered "KR" trademark while providing complete, private-labeled OEM services to some of the industry's most recognizable global valve brands.
Equipped with 15 heavy machining centers and automated assembly setups, our production lines are managed by skilled, long-tenured valve assembly technicians.
Offering over 20 distinct valve families and 500 variants, we fulfill international standard orders (DIN, ANSI, BS, JIS) and custom engineering designs under one roof.
From metallurgical verification of incoming raw castings to final hydrostatic testing of finished units, we enforce tight tolerances at every assembly step.
By executing core machining, sandblasting, coating, and assembly in-house, we eliminate intermediate processing fees, offering highly competitive direct pricing.
Our application engineers provide responsive pre-sales selection advice, customized sizing calculations, and complete installation/maintenance support.
Purchasing agents often seek the right balance between cost efficiency and technical quality when sourcing butterfly valves. Historically, high-precision valves were sourced exclusively from Western European or North American manufacturers. Today, Chinese industrial clusters, particularly those specializing in advanced valve manufacturing, have closed the technology gap. By combining modern foundry automation with highly trained machinists and integrated global supply chains, factories like KR Valve Group deliver high-quality products that meet and exceed international expectations.
This manufacturing efficiency is built on regional integration. Our raw casting suppliers, seal manufacturers, and coating providers operate within close proximity, dramatically reducing logistics costs and turnaround times. In addition, our automated machining setups ensure that every double flange butterfly valve body matches exact tolerances. This high level of dimensional accuracy is critical for ensuring reliable seal compression, low operating torque, and consistent interchangeability of spare parts over long service cycles.
Depending on the working environment, double flange butterfly valves require specific material configurations. For municipal water works and HVAC installations, ductile iron (GGG40 or GGG50) bodies with resilient seats (EPDM or NBR) are standard. EPDM offers excellent resistance to water, steam, and dilute acids, while NBR is ideal for oil-bearing media. For harsh environments, such as chemical plants and marine installations, we supply stainless steel bodies (SS304/SS316) paired with high-durability PTFE liners or metal-to-metal seats designed to withstand corrosive fluids and high temperatures.
Discover how KR valves have been deployed to solve complex fluid control challenges in global infrastructure projects.
KR supplied a complete package of specialized, heavy duty water control valves to assist in stabilizing high-pressure discharge channels under extreme elevation and ambient temperature changes.
We delivered a range of large-diameter double flange butterfly valves and non-return check valves to ensure reliable flow control in a regional clean water distribution network.
We supplied resilient seat gate valves and double flange butterfly valves engineered to manage high-solids municipal wastewater and aggressive sludge media without clogging.
KR delivered a series of corrosion-resistant, PTFE-lined wafer and double flange butterfly valves with stainless steel bodies to safely control the flow of aggressive acid lines.
We manufactured and supplied metal-seated gate valves and high-performance ball valves designed to handle low-temperature gas operations under high working pressures.
We provided a comprehensive set of automated water control valves to coordinate sewage flow routing, helping the municipal operator achieve high efficiency and low maintenance overhead.
Watch our manufacturing processes, testing protocols, and finished valve operations in action.
Expert technical insights to help engineers and procurement teams select the right double flange butterfly valves.
Select from our wider range of industrial valves, strainers, and pipeline components designed for trouble-free operations.
Partner with KR Valve Group today. Contact our technical engineering team to receive customized drawings, pricing schedules, and comprehensive support for your piping systems.
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