Explore our premium engineered range of standard and bespoke valve systems, certified to meet international quality baselines.
High-integrity industrial flow isolation across water systems, power generation, and chemical process infrastructure.
In modern industrial engineering, fluid management systems require extreme precision, structural reliability, and energy-efficient operations. Flange butterfly valves are critical components in these applications, offering robust isolation and regulation capabilities. As global infrastructure advances and process industries adopt strict safety metrics, the demand for high-performance double-flanged butterfly valves is expanding rapidly.
Unlike traditional gate or globe valves, flange butterfly valves provide a compact face-to-face footprint, lighter structural loads, and rapid quarter-turn operation. This makes them ideal for large-bore systems in municipal water distribution, HVAC networks, maritime ballast operations, desulfurization systems, and chemical processing facilities. Modern plant operators require valves that not only prevent external leakage but also minimize line energy losses through optimized hydrodynamic disc profiling.
As a leading OEM flange butterfly valve factory, KR Valve addresses these challenges by developing valves that align with global specifications, including API 609, DIN EN 593, and ISO 5752. Our engineering focus focuses on seat materials, eccentric mechanical dynamics, and tight integration with advanced electric, pneumatic, and hydraulic actuators.
A technical guide to selecting concentric, double offset, and triple offset flange butterfly valves.
Designed for water distribution and general utility lines up to 16 Bar. Employs a centered shaft with resilient elastomer liners (EPDM, NBR, or Viton) providing bubble-tight shutoff via mechanical compression.
The shaft is offset from the seating plane and centerline. This offset minimizes friction during actuation, reducing seat wear and torque requirements in chemical processing, power plants, and high-flow systems.
Featuring a third angular offset that eliminates friction entirely during rotation. Utilizes metal-to-metal seating to deliver zero-leakage performance under extreme temperatures and pressures exceeding 40 Bar.
| Valve Seat Material | Temperature Range | Recommended Application Media | Primary Industry Classification |
|---|---|---|---|
| EPDM (Soft Seal) | -20°C to +120°C | Potable Water, Sewage, Cooling Water, Neutral Fluids | Municipal Utilities, HVAC, Desalination |
| PTFE (PolyTetraFluoroEthylene) | -40°C to +200°C | Corrosive Chemicals, Acids, Hydrocarbons, Food Process Lines | Chemical Processing, Food & Beverage, Pharma |
| Metal-to-Metal (Stellited Steel) | -196°C to +600°C | High-Pressure Steam, Hot Gases, Corrosive Slurries, Petroleums | Oil & Gas, Power Generation, District Heating |
| High-Performance FKM (Viton) | -15°C to +200°C | Oils, Fuels, Hydrocarbons, Acids at Elevated Temperature | Refinery Plants, Petrochemical Logistics |
How KR Valve leverages R&D, precision production, and testing to supply global fluid control markets.
Our dedicated R&D team drives product innovation and design updates. We translate industry requirements into high-performance products by testing structural profiles and analyzing fluid flow characteristics. The engineering lab supports modern testing protocols to optimize valve structures, allowing us to offer 20 product series and over 500 valve models.
By using computer-aided modeling and Finite Element Analysis (FEA), we evaluate stress patterns on structural parts like valve bodies, shafts, and discs. This predictive engineering helps us optimize materials, reduce operational torque, and extend service life, ensuring stable performance in dynamic pressure conditions.
Our manufacturing facility operates under the ISO 9001 quality management framework. Equipped with 15 advanced machining machines, automated assembly lines, and specialized tooling systems, we manage both large standard production runs and custom manufacturing batches. We regularly update our inventories to support flexible delivery timelines for critical projects.
Our machinists process castings with tight tolerances. This precision machining ensures concentricity in shaft bores and smooth finishes on sealing faces, which helps minimize seat friction and prevent premature wear.
Zero leakage is our primary engineering and manufacturing standard. The quality control department performs physical inspections on every valve before it leaves the facility. All products undergo visual inspection, dimensional checking, shell pressure testing, and seat closure leakage tests in line with international standards like API 598 and EN 12266-1.
We perform material verification using spectrometer analysis to confirm cast chemistry. Non-destructive testing (NDT), such as ultrasonic and magnetic particle testing, is also applied to heavy cast parts to check for internal defects, ensuring the mechanical integrity of our high-pressure valves.
Delivering engineering value, high material standards, and responsive service to our global partners.
We market under our independent brand "KR" and provide comprehensive OEM/ODM services for industrial clients globally, maintaining long-term partnerships with established valve brands.
Our machining setups and assembly stations are managed by experienced operators, allowing us to maintain stable production and precise mechanical tolerances.
With 20 primary product series and over 500 standard designs, we supply standard and non-standard custom valves tailored to specific pressure, temperature, and media profiles.
We monitor quality at every step of production. Our team inspects raw cast components and tests finished products under pressure to verify mechanical structural integrity.
By keeping core processes like machining, assembly, and testing in-house, we manage production costs and offer competitive pricing to our global clients.
Our engineering division provides comprehensive support, assisting clients from initial valve sizing and materials selection through to installation guide and maintenance support.
Reliable valve applications in international infrastructure projects, municipal works, and energy systems.
KR supplied specialized hydraulic water control valves for high-head reservoir regulation, ensuring stable pressure control in deep-mouthed bypass lines.
We delivered large-diameter double flange butterfly valves and fast-closing check valves, supporting high-volume flow networks in Northern Italy.
We supplied resilient-seated butterfly valves and non-rising stem gate valves designed to handle high solid contents and abrasive fluids in municipal processing plants.
We supplied fluorocarbon-lined butterfly valves and full PTFE-lined ball valves to provide reliable corrosion resistance against highly acidic process fluids.
We provided low-temperature cast steel gate valves and high-pressure ball valves designed for stable sealing performance in cold climates.
KR supplied automatic control valves and heavy-duty check valves, optimizing raw sewage flow handling and reducing maintenance down-time.
Take a virtual look inside our factory floors, machining operations, and quality inspection workflows.
Integrating intelligence, predictive maintenance, and real-time flow telemetry into modern piping systems.
Modern industrial operations are shifting towards digital integration and automated flow control. This shift requires valves that do more than just isolate flows; they must also interface with industrial networks (like Modbus, Profibus, or HART protocols) to provide real-time status data.
KR Valve is designing smart valve assemblies equipped with digital positioners and advanced sensor packages. These units monitor key performance indicators, including valve cycle count, dynamic operating torque, and localized line pressure drops. By analyzing this data, plant managers can transition from reactive maintenance schedules to predictive intervention programs, preventing unplanned shutdowns.
Furthermore, our engineering team works to optimize valve profiles to align with clean energy initiatives. By improving disc hydrodynamics, we help reduce pressure losses across the valve, lowering the overall energy consumption of system pumps.
Solving common pipeline issues, sizing problems, and material selection questions for project engineers.
Contact our engineering support team for detailed sizing calculations, material selection help, and custom OEM manufacturing quotes.
Contact KR Engineering TeamBrowse our selection of rising stem gate valves, hydraulic float controls, backflow preventers, and custom air release valves.
KR VAVLE
