Browse our primary high-durability flow control components, manufactured strictly according to international standards (ANSI, DIN, BS, AWWA).
KR possesses more than 20 years of experience in producing high-performance standard and non-standard industrial valves. We supply an extensive range of over 500 valve designs, including high-pressure butterfly valves, gate valves, customized check valves, fluid control valves, and critical accessories for municipal pipe setups. Our heavy industrial units are applied extensively within water reclamation, massive reservoir construction, HVAC systems, power grids, and chemical process engineering plants worldwide. Our commitment to metallurgical precision and zero-leakage control has established our status as a trusted high-repeat supply chain partner.
We are dedicated to establishing mutually beneficial partnerships with project developers, EPC contractors, and international distributors. We operate under the core thesis that fluid infrastructure stability relies on robust engineering, comprehensive raw material inspection, and dynamic support mechanisms.
Our complete lifecycle approach integrates design innovation, precision machining, and strict quality control protocols.
Our dedicated R&D division drives product optimization and continuous mechanical innovation. By simulating fluid flow patterns using modern CFD software, our technicians design flow geometries that minimize pressure drops and head losses. Our integrated laboratory permits physical validation testing to refine seat geometry, torque profiles, and disc structural integrity.
Operating over 30 precision machining units, including large-scale CNC vertical lathes and horizontal boring mills, KR executes custom machining with strict tolerance controls. Production schedules are optimized via real-time ERP tracking systems to ensure accurate delivery. Dynamic component inventory management permits immediate assembly and quick dispatch.
Our verification standards are based on zero leakage principles. Every finished valve is tested in our quality control section to verify seat and shell integrity according to API 598 or EN 12266-1 standards. We execute ultrasonic testing, magnetic particle testing, and paint dry film thickness checks, supplying complete inspection certificates for each order.
How sourcing from industrial clusters in China enables cost optimization, supply chain stability, and advanced metallurgical execution.
Our manufacturing plant benefits from adjacent metal casting foundries. This geographic proximity allows us to monitor raw material composition directly, ensuring ductile iron GGG40/GG50 and cast steel WCB chemistry meets ASTM requirements prior to machining.
China's modern manufacturing lines are designed around global technical frameworks. KR produces check valves and ball valves complying with EN, API, BS, and AWWA specifications, ensuring mechanical interchangeability and long-term functional performance.
By utilizing automated mold-making machines, synchronized assembly lines, and high-efficiency tooling, we lower energy consumption and waste. This allows us to supply high-end, zero-leakage valves at highly competitive prices.
Modern industrial frameworks demand high material performance, low maintenance schedules, and resistance to environmental stress.
Chemical processing and effluent treatmen require high resistance to organic compounds and acidic media. The integration of full PTFE and FEP lining inside stainless steel housings prevents fluid contact with base metals, preventing degradation and eliminating internal corrosion concerns.
Water hammer presents a major risk of failure in long-distance municipal fluid lines. Wafer dual-disc check valves utilize spring-assisted discs to execute fast closures before backflow velocity can build up, mitigating high shock pressures and protecting system pump installations.
Valves are increasingly integrated into smart SCADA networks. Integrating pneumatic actuators, position monitors, and motorized gear systems with high-torque ball and butterfly valves allows plant managers to monitor and manage fluid movement parameters remotely.
Our valves are deployed in infrastructure projects across more than 50 countries, demonstrating reliable performance in diverse environments.
KR supplied tailored high-pressure hydraulic control valves and large-diameter float systems. These valves deliver reliable performance under demanding hydrostatic pressure conditions, ensuring steady water levels and preventing reservoir overfills.
We delivered high-diameter double eccentric butterfly valves and non-return check valves for municipal supply grids in Italy. These units prevent reverse flow water hammer and minimize head loss across distribution nodes.
We supplied resilient seat gate valves and metal-to-metal swing check valves designed for sludge processing. The internals are engineered to prevent sediment build-up and resist wear from particulate matter.
KR supplied a complete system of corrosion-resistant, full PTFE-lined ball and butterfly valves. These valves deliver reliable performance when handling aggressive chemical lines, protecting plant operators and preventing environmental leaks.
High-pressure cast carbon steel (WCB) floating ball valves and rising-stem gate valves were manufactured to perform reliably in low-temperature regions, meeting strict sealing requirements for gaseous media.
We manufactured large-diameter wafer check valves and resilient seat gate valves designed to withstand the biological and chemical demands of municipal sewage treatment lines.
Watch our machining operations, assembly processes, and pressure testing procedures in our manufacturing facilities.
We provide support throughout the procurement cycle, from technical design and material selection to final delivery.
We supply products under our own independent registered brand 'KR' and provide comprehensive OEM manufacturing services, producing valves to match our customers' technical specifications and branding requirements.
Our machining lines feature 15 modern vertical lathes and boring mills. Our technicians have extensive hands-on experience in manufacturing large-bore gate and check valves up to DN1200.
We manufacture valves in 20 distinct series and over 500 catalog configurations, supplying custom dimensions, specialized flange drillings, and non-standard face-to-face dimensions.
Every process step is monitored. We trace the casting heat number, verify the seat hardness, and inspect the dimensional limits of all internal components before final assembly.
By casting and machining components in-house, we control costs and reduce raw material waste, allowing us to pass the savings on to our customers.
Our engineering division supplies pre-sales consultations, including CFD analysis reviews, and provides after-sales technical support for installation and maintenance.
Find the right product family for your municipal, chemical, or high-pressure applications.
Expert technical answers for pipeline designers, procurement managers, and mechanical engineers.
The choice of sealing material depends on the operating temperature, pressure, and fluid chemistry. EPDM resists weathering, ozone, and water-based municipal fluids, performing reliably up to 120°C. NBR is suitable for petroleum-based oils, hydrocarbons, and gas applications up to 90°C. PTFE provides universal chemical resistance, making it suitable for acids, alkalis, and aggressive organic chemicals, withstanding temperatures up to 200°C.
Wafer dual-disc check valves have a shorter face-to-face dimension and lighter design compared to swing check valves. They use spring-loaded plates that close quickly as flow velocity decreases, reducing the risk of water hammer. Their compact size makes them suitable for installations where space is limited.
GGG40 and GGG50 ductile iron contain graphite in nodular or spherical form, which provides higher tensile strength, ductility, and impact resistance compared to grey cast iron (GG25). This allows ductile iron valves to handle higher pressure loads, thermal expansion stress, and external mechanical impacts without cracking.
A single-acting pneumatic actuator uses compressed air to rotate the valve in one direction (usually to open) while compressing internal springs. When air pressure is released, the spring force automatically returns the valve to its fail-safe position (typically closed). This design provides a reliable safety shutoff in the event of an electrical or air supply failure.
Flange drillings are typically governed by standards such as EN 1092-2 (for European PN10/PN16 ratings), ASME B16.42/B16.5 (for Class 150/300 US specifications), or BS 10. Face-to-face dimensions are specified by standards such as EN 558-1, DIN 3202, or ASME B16.10, ensuring that replacement valves fit existing piping layouts.
We supply EN 10204 3.1 material certificates, hydrostatic seat and shell test reports, coating thickness verification sheets, and ISO 9001:2015 quality system compliance certificates for all major project orders.
Additional high-performance models designed for industrial gas, chemical processing, and municipal water applications.
KR VAVLE
