Explore our primary range of heavy-duty gate, ball, check, and butterfly valves custom-engineered to meet stringent international standards.
In mid-to-large-scale fluid control applications, selecting a high-performance 6 butterfly valve (commonly corresponding to nominal size DN150) is vital. A 6-inch flow control line represents the nexus where volumetric demand meets high-velocity pipeline stresses. Whether managing municipal water distribution systems, industrial chemical processes, or HVAC cooling loops, the butterfly valve serves as a compact, economical, yet extraordinarily reliable shutoff and throttling mechanism.
Often utilized in low to medium-pressure water utility grids. Resilient EPDM/NBR seats wrap around the valve body cavity, creating complete sealing isolation from metallic components. Essential for preventing raw liquid corrosion.
Designed with an offset shaft and disc layout that reduces seat contact during actuation. This minimizes wear, significantly prolonging system operational lifespan, making it excellent for gaseous flow and clean-liquid services.
Provides bi-directional, zero-leakage closure under harsh conditions. Uses a metal-to-metal seal to withstand severe temperatures up to 500°C and pressures exceeding PN63, providing a fire-safe solution for chemical plants.
KR has more than 20 years of experience in producing standard and non-standard valves of various types. We supply a wide selection of over 500 valve products, including butterfly valve, gate valve, check valve, water control valve, as well as all their matching and accessory products. These products have applications in various industries such as water treatment, dam construction, commercial buildings, energy and heating, chemical engineering, etc. We have won high repeat purchase rates from customers with excellent product variety and quality.
Beyond product excellence, we are dedicated to creating a mutually beneficial partnership with every customer. We believe that reliable service is as crucial as superior products, and we strive to continuously optimize the customer experience to achieve long-term win-win cooperation.
Today, KR VALVE’s products have been exported to over 50 countries and regions in Europe, Asia, Africa, and Oceania, providing project construction and brand marketing services to thousands of customers. We look forward to collaborating with you, leveraging our expertise, comprehensive product range, and unwavering commitment to quality and service to support your success.
Ensuring high performance requires standard-aligned engineering at every phase—from initial CAD modeling to mechanical test execution.
Our dedicated R&D department drives continuous design optimization and technical innovation. Technicians design and develop valves using advanced finite element analysis (FEA) to ensure structural integrity. Our laboratory features extensive modern testing capabilities to push pressure limits, cycling limits, and sealing performances.
Our production department creates rigorous schedules aligned with project timelines to guarantee timely product deliveries. Standard operations are audited under ISO-9001 certification. With more than 30 modern production apparatuses, we handle raw casting machining, seat assembly, and actuation settings efficiently.
Our quality assurance department enforces a strict zero-leakage principle through 100% product testing. We conduct thorough evaluations of dimensional accuracy, cosmetic appearance, hydrostatic body integrity, and low-pressure pneumatic seat testing. All reports are issued in compliance with EN 10204 3.1 certification.
As industrial automation progresses, the simple manual 6 butterfly valve is evolving into an intelligent, digitized hub. Our engineering roadmap centers on introducing advanced digitalization and carbon-neutral developments into fluid system components.
Integrating low-power wireless pressure, temperature, and leakage sensors directly into the butterfly valve body. Real-time telemetry predicts wear before failures happen, reducing plant downtime.
Developing eco-compliant polymeric compounds and packing glands that comply with ISO 15848-1 standards. These prevent gas leakages and help facilities lower their carbon footprints.
Applying High-Velocity Oxygen Fuel (HVOF) tungsten carbide thermal coatings to stainless-steel discs. This extends service life in abrasive slurries or high-velocity municipal lines.
Using computational fluid dynamics (CFD) to design thin, profiled valve discs. This minimizes turbulence, maximizes flow capacity (Cv value), and lowers overall pumping costs.
We balance precision manufacturing, flexible OEM services, and comprehensive QA testing to support global plant operations.
We supply our own independent brand, KR, while offering specialized OEM/ODM services. We maintain long-term production partnerships with many top global valve brands.
Our facility runs 15 heavy-duty machining centers and dedicated assembly lines, operated by highly experienced machinists and valve technicians.
With 20 core series and over 500 variants, we supply standard and non-standard custom solutions designed to meet international specifications.
Every element, from structural body castings to small EPDM seals and bolts, is individually inspected before assembly into finished products.
By keeping raw manufacturing, machining, and testing in-house, we control costs and pass those savings directly on to our partners.
Our engineers provide complete pre-sale planning, actuator sizing calculation, and post-installation advice for all projects.
Sourcing OEM valves from China is no longer just about lower costs—it is about utilizing advanced, integrated manufacturing hubs. KR Valve Group combines casting, precision machining, automated testing, and logistics coordination into one streamlined process.
ISO-9001 Audited Assembly Station: Assuring standard torque setups for all actuators.
Different fluid systems pose unique structural challenges. We supply custom 6-inch butterfly valves engineered for your specific application requirements.
Raw seawater and wastewater carry highly corrosive chlorides. Our EPDM-lined concentric butterfly valves use Super Duplex or Al-Bronze discs to resist corrosion, preventing pitting and cavitation.
Boiler lines demand valves that handle high-velocity steam and hot water cycles. Our triple eccentric metal-seated valves prevent thermal expansion failures, maintaining tight shut-off.
Handling harsh acids requires robust protection. Our PTFE-lined and stainless steel butterfly valves provide clean chemical resistance, protecting operators and equipment from leaks.
To integrate seamlessly into international pipelines, industrial valves must meet strict regulatory standards. KR Valve products are engineered, tested, and documented in accordance with recognized worldwide codes:
Governs butterfly valve construction, wall thicknesses, pressure limits, and testing. Ensures safety under pressure surges.
Specifies European face-to-face dimensions and torque ratings. Simplifies drop-in replacements for standard pipeline installations.
Applies to municipal drinking water systems. Confirms our EPDM and coatings are non-toxic and safe for potable water.
Certifies pressure safety compliance for European markets. Crucial for valves operating in explosive environments.
See our manufacturing processes in action, showcasing raw machining accuracy and high-pressure seat tests.
Valves Production Process & Automation Line Tour
Under-pressure Sealing & Zero Leakage Quality Control Testing
Our products are utilized in water treatment systems, dam installations, municipal networks, food plants, and gas networks worldwide. Here are some of our completed global projects:
KR supplied a full series of custom water control valves to handle high-flow discharge and intake regulation at a dam site in Chile.
Supplied large-diameter eccentric butterfly and swing check valves for a municipal clean water treatment facility in Italy.
Shipped a selection of resilient seated butterfly valves and gate valves to handle municipal sludge and wastewater treatment processes.
Supplied specialized corrosion-resistant PTFE-lined ball and butterfly valves to handle concentrated acid lines safely.
Supplied high-pressure carbon steel (WCB) gate and floating ball valves engineered to meet strict low-temperature safety criteria.
Provided customized non-return check valves and water control valves for a municipal sewage pumping plant in Brazil.
We design, machine, and test 20 distinct series of industrial valves, offering flexible solutions for standard and custom applications.
Review answers to common technical, engineering, and manufacturing questions about our 6-inch butterfly valves.
Review further specialized valves, strainers, and non-return check valves designed for harsh municipal and industrial applications.
KR VAVLE
