High durability, direct-to-factory configurations certified for chemical, municipal water, and harsh environmental processing systems.
KR Valve Group possesses more than 20 years of experience in producing standard and non-standard industrial valves of various types. We supply an extensive selection of over 500 valve products, including butterfly valves, gate valves, check valves, and water control valves, as well as their matching and accessory products. Our solutions serve vital infrastructure projects and high-reliability systems in water treatment, dam construction, commercial buildings, municipal energy, heating, chemical engineering, and power generation.
Leveraging deep expertise in metallurgy and precision casting, we manufacture premium Stainless Steel (SS) Gate Valves configured in varying grades (CF8, CF8M, CF3, CF3M) to guarantee outstanding performance under pressure, corrosive exposures, and extreme temperatures. Today, KR VALVE’s products are exported to over 50 countries and regions in Europe, Asia, Africa, and Oceania, providing direct project consulting and brand marketing services to thousands of corporate partners worldwide.
"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."
How KR integrates advanced metallurgy, automation, and material science to meet the demands of tomorrow.
Stainless steel gate valves rely fundamentally on alloy chemistry. Modern industrial developments require valves to endure conditions far beyond normal standards. At KR, we are actively transitioning from standard ASTM A351 CF8 (SS304) and CF8M (SS316) castings to ultra-low carbon variants (CF3 and CF3M) to eliminate sensitization during welding and prevent intergranular corrosion. For highly corrosive systems—such as hot sulfuric acid processes or desalination facilities—we offer custom builds using Super Duplex Stainless Steels (Grades 4A, 5A, 6A) and nickel-chromium-molybdenum alloys (Hastelloy, Inconel).
Environmental standards such as Clean Air Act requirements and ISO 15848-1 mandate low-emission packings. Our research and development focuses on zero-leakage configurations, employing dynamic graphite rings, spring-loaded live packing designs, and PTFE/RTFE chevron rings. These systems ensure that the valve stem seal remains gas-tight through thousands of thermal cycles, minimizing fugitive VOC emissions in volatile petrochemical processing.
The industrial internet of things (IIoT) requires valves to act as diagnostic nodes. KR’s technical roadmap includes integrates smart actuators with custom SS gate valves. Using wireless fieldbus communication (HART, Profibus, Modbus), operators can receive real-time torque updates, stem position feedback, and acoustic leakage signatures. This shifts maintenance from scheduled shutdowns to predictive interventions, reducing plant downtime significantly.
For high-pressure, slurry, or steam services, standard stainless steel surfaces can suffer from galling or wire-drawing erosion. KR addresses this by applying robotic plasma arc hard-facing, using Stellite 6 and other wear-resistant alloys on the wedge and seat sealing rings. This process ensures the valve maintains a tight shut-off even when subjected to fluid velocities containing suspended particles or micro-solids.
From standard components to high-specification customizations, we apply strict process control at every stage.
Our dedicated R&D department utilizes finite element analysis (FEA) and computational fluid dynamics (CFD) to optimize valve body geometry. This reduces pressure drops and turbulent flow patterns, improving overall system energy efficiency.
Operating under strict ISO-9001 quality management guidelines, our facility is equipped with over 30 advanced production machines. Monthly inventory updates ensure we can support fast-track capital projects and standard orders.
Our primary quality directive is zero leakage. To achieve this, every gate, seat, and body is tested according to international testing criteria (API 598/EN 12266-1). This includes hydrostatic, pneumatic, and non-destructive examinations (NDE).
Optimized configurations engineered to address specific application parameters and system stresses.
Highly resistant to volatile media, high pressures, and extreme temperatures. Utilizes API 600 and API 603 designs to guarantee containment and fail-safe operation during thermal expansion.
Equipped with Super Duplex and CF8M alloys to withstand salt spray and pitting corrosion. High-precision seals ensure zero leakage, protecting long-distance pipelines and processing systems.
Specifically engineered for corrosive fluids, handling concentrated acids, bases, and oxidizing agents. Available with custom face-to-face dimensions and specialty alloy overlays.
Constructed with internally polished CF3M stainless steel to eliminate bacterial traps. Designed for easy sterilization (CIP/SIP) and sanitary clamp connections.
Built for continuous service under high pressures and steam conditions. Features hard-faced seats and flexible wedges to prevent locking caused by temperature changes.
Configured with robust, low-torque mechanical gears for large-diameter pipelines. Delivers reliable isolation for heating loops in commercial and municipal networks.
Six fundamental columns supporting global supply chains and heavy engineering projects.
We supply products under our own independent brand, "KR", while also offering extensive OEM/ODM services for many globally recognized valve brands.
Our workshop features 15 advanced machining centers and specialized assembly lines, operated by a highly experienced technical team.
We manufacture 20 distinct series and over 500 valve types, covering both international standards and bespoke customized designs.
Every component is sourced from certified foundries, carefully inspected, and assembled under strict internal QC protocols to guarantee quality.
By managing the casting review, machining, assembly, and testing in-house, we offer highly competitive pricing without sacrificing material quality.
We provide full pre-sales consultation, engineering design support, installation training, and responsive post-sales field support.
As industrial supply chains face changing global demands, KR Valve Group has upgraded its manufacturing facility in China to integrate Factory 4.0 practices. We utilize digital production scheduling, automated warehouse management, and CNC machining centers to ensure high consistency and precision. This digital model reduces lead times for custom projects while maintaining material traceability back to the original heat number.
Our strategic location near major logistics hubs and shipping ports allows us to export efficiently to Europe, Southeast Asia, South America, and the Middle East. By maintaining a large inventory of raw castings in CF8, CF8M, CF3, and CF3M, we protect our clients against price volatility and raw material shortages, providing stable pricing and reliable delivery schedules.
We welcome third-party inspections (such as SGS, TUV, Bureau Veritas, or DNV) and support comprehensive factory audits. Our operations are fully documented under international quality assurance procedures, covering material test reports (MTRs to EN 10204 3.1), dye-penetrant testing, positive material identification (PMI), and pressure test records.
Ensuring cross-border compliance, domestic support, and international engineering approval.
To support global projects, our manufacturing is aligned with relevant international standards. Our valves comply with European PED 2014/68/EU (CE marking), API 600, API 603, ASME B16.34, and DIN/EN standards. For water systems, we provide drinking-water compliant elastomers and materials that align with WRAS, NSF/ANSI 61, and ACS standards, ensuring local safety and environmental compliance.
We assist international engineering companies with detailed technical submittals, complete 2D/3D CAD drawings, material safety datasheets, and calculation sheets. Our dedicated support team is available to resolve technical issues during the design phase, and our global distribution network helps ensure smooth customs clearance and local delivery.
Expert technical answers to common queries regarding custom stainless steel gate valves.
Take a virtual tour of our production workshop and inspection procedures.
Watch our CNC horizontal machining centers process high-specification valve bodies with precise tolerances.
See our hydrostatic testing setup performing high-pressure shell and seat containment tests on large-diameter valves.
KR valves are installed in water treatment networks, municipal pipelines, and heavy industrial facilities globally.
KR supplied a full range of custom-engineered water control and high-pressure isolation gate valves for a hydroelectric dam project in Chile.
We supplied large-diameter double eccentric butterfly valves and check valves for a municipal drinking water pipeline network in Italy.
KR delivered wear-resistant gate valves and butterfly valves for a high-solids wastewater and sludge processing facility in Indonesia.
We provided corrosion-resistant CF8M flanged gate valves for handling chemical media in a petrochemical plant in Vietnam.
We supplied heavy-duty flanged ball valves and high-pressure gate valves for gas isolation stations in Russia.
We supplied corrosion-resistant wastewater valves and resilient seated gate valves for a municipal water treatment facility in Brazil.
Over 20 series and 500 varieties engineered to cover a wide range of operating parameters.
Engineered for precise fluid isolation and filtration in heavy-duty commercial and process systems.
KR VAVLE