GRH has been awarded as a provincial engineering technology center, new high-tech enterprise and other honorary titles. Our self-developed load-sensitive proportional valve has been set up as national key project and we have established joint research and development teams with several well-known domestic universities to develop new technology applications within fluid dynamic fields. We also introduced international high-end technology talents, experienced designers, developers and manufacturing specialists to develop hydraulic components and system. This team implemented an international advanced R&D concept and manufacturing technology and utilized advanced UG/SOLIDWORK software and finite element method, giving GRH’s new products incomparable technical advantages. GRH has paid attention to the importance of electro-hydraulic system integration and has been actively involved in the development of systems that save energy and reduce costs.
Manufacturing
GRH’s factory has 50 processing centers and 220 sets of CNC honing machines, CNC gear hobbing machines, CNC external cylindrical grinding machines, German thermal deburring machines, American CNC vertical honing machines, gear-shaving machines, gear honing machines, ultrasonic cleaners, controlled atmosphere carburizing furnaces, German vertical and horizontal processing centers, British cylindricity instruments, three coordinate measure machines, cylindricity instruments, combination-type gear inspection instruments and more, allowing for an annual hydraulic component output of 1.6 million pieces.
At GRH we have invested significantly in cleaning and purification equipment, especially in controlling cleanliness throughout the testing process. To improve our deburring process, we've implemented a thermal energy deburring production line. This investment has substantially enhanced our control over burr and flash, ensuring that each component is free of burrs. In addition, to extend the lifespan of our products, we have invested in key equipment for material processing. This enhances the high-pressure resistance and high-temperature tolerance of critical parts, reflecting our commitment to quality and durability in every product we manufacture.
NACHI industrial robot
GRH utilizes NACHI industrial robots to ensure the highest consistency in gear machining dimensions. These robots not only guarantee the stability of machined parts but also significantly enhance efficiency, combining precision with productivity.
Controlled-atmosphere carburizing furnace
Our controlled-atmosphere carburizing furnace features complete computer automation for parameters and programs. This advanced technology ensures the quality of heat treatment for parts, making it more stable and reliable.
DMG high precision CNC machining center
The DMG high precision CNC machining center is a high-end imported equipment at GRH. It meets requirements for high precision, complex processes, and high stability, catering to the most demanding machining tasks.
Endoscope for visual inspection
To ensure the cleanliness of components, GRH uses an endoscope for visual inspection. This allows for the detection of internal burrs, casting sand, and machining defects that are invisible to the naked eye.
Engis honing machine
The Engis honing machine at GRH is known for its high control precision, with honing accuracy reaching up to 1μm. This level of precision ensures the highest quality in the finishing of components.
Taylor roundness/cylindricity measuring instrument
The Taylor roundness/cylindricity measuring instrument is used to ensure the highest precision in component fabrication. This tool is essential for verifying roundness, straightness, and concentricity, maintaining parts within strict tolerance limits and upholding our commitment to quality and accuracy in every product.
Quality Control
At GRH, our manufacturing base is certified with ISO 9001:2000, EU CE, and various classification society certifications, reflecting our commitment to international quality standards. We ensure that 100% of our hydraulic products undergo rigorous factory testing, with safety and stability monitored through pressure, temperature, and flow measurements. This comprehensive approach results in the superior quality of our products.
Our internal quality control adheres to a four-level standard, encompassing raw material control, manufacturing process control, finished product control, and continuous improvement control for mature products. This multi-tiered system ensures the highest standards of quality are maintained throughout every stage of production.
Assembly and testing
GRH owns and operates 3 assembly lines and 20 sets of testing benches (including CNC testing benches) to test the flow, pressure, speed, torque, mechanical efficiency, volumetric efficiency, air tightness, noise, and other parameters. The to-be-delivered products are 100% tested. Impulse test, life test, high and low temperature test, high-pressure test and other tests are also available.
Our Clients
Over decades of dedicated research, development, and manufacturing of hydraulic components and control systems, GRH has established itself as a comprehensive provider of hydraulic systems and components in the fields of engineering machinery, agricultural machinery, mobility, and industrial applications. The wide range of hydraulic components we offer have shown exceptional performance in a variety of applications, including articulated boom lifts, scissor lifts, forklifts, hydraulic elevating platforms, lifting columns, truck tailgates, garbage compactors, dump trucks, trailers, bending machines, die casting machines, injection molding machines, bottle blowing machines, and rubber molding machinery.
At GRH, we pride ourselves on our high-end client portfolio, maintaining close and long-term strategic partnerships with leading domestic and international companies in engineering and agricultural machinery. Our commitment to quality and innovation has made us a trusted partner in these industries.
