GUORUI HYDRAULIC |
GRH specializes in providing hydraulic components and solutions for hydraulic systems.
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Over the past 30 years, GRH has continuously improved and shown great enthusiasm, evolving into a rising power in the fluid power industry since its establishment in 1986.
Research and development are key drivers that enable GRH to create innovative products. Our guiding principles include TS16949 and ISO14000 standards. The capabilities and creativity of our employees are major factors that set us apart from competitors.
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GRH designs and produces Hydraulic Gear Pumps & Motors, Monoblock Valves, Sectional Stack Valves, Proportional Valves, and Flow Dividers. These products are used in industrial machinery, construction equipment, agricultural equipment, and material handling applications. GRH is also ready to collaborate with customers to develop specialized products tailored to their unique needs. Customers can rely on GRH's extensive experience in system design and application when designing their hydraulic systems. |
GRH has developed a series of load-sensing proportional stackable valves, which significantly improve valve performance and system efficiency. |
GRH (Shanghai) - International Sales Office
GRH (Jiangsu) - Manufacturing Facility and Domestic Sales Office
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Production Description
Major Technical Data | |
Rated flow rate: | 45 L/min |
Maximum flow rate: | 55 L/min |
Maximum pressure at P port: | 310 bar |
Maximum pressure at A/B port: | 310 bar |
Maximum pressure at T port: | 25 bar |
Internal leakage (at 70 bar): A/B to T | 30-35 cc/min |
Temperature range of the hydraulic oil | |
with NBR (BUNA-N) seals: | -20ºC - 80ºC |
with FPM (VITON) seals | -20ºC - 100ºC |
Spool stroke (1/2 position): | +7/-7 mm |
With floating function (1/2 and F position) | +7/-7 - 9 mm |
Recommended temperature range: | -40ºC - 60ºC |
Packaging & Shipping

Our Services
GRH now has over 300 employees, including 51 technical staff. Its enterprise fixed assets amount to RMB 42 million, with a total space of 22,000 square meters. There are approximately 208 machines, producing about 1.6 million hydraulic components annually.
GRH has four centers and four branch plants: Design Center, Sales Center, Administration Center, Testing Center; Gear Pump and Motor Plant, Hydraulic Valve Plant, Heat Treatment Plant, and System Plant.
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GRH will work together with the customers to create a better future |
Partnership

FAQ
Application? |
A: 1. Hydraulic system |
2. Agriculture machine |
3. Construction machine |
4. Automobile: |
5. Local distributors |
Q: What Is The Payment Terms. |
A: Full order: 30% as deposit, the balance before shipment; |
Small order / sample order: full payment in advance; |
Q: Can I Mark My Own Brand On The Pump? |
A: Yes. Full order should mark your brand and code; |
Q: What is our main export market? |
A: America (45.5%): The United States, Canada, Argentina, Brazil |
Europe (30.8%): Italy, Germany, England, Holland, Spain, Switzerland, Finland, Russia, Poland. |
Asia (18.5%): Korea, Singapore, India, Turkey, Iran, Vietnam, Saudi Arabia, Syria, Israel, Lebanon |
Others (5.8%): |
Details:
Cast iron / full cast iron |
Port: BSP, NPT, UNF etc |
Shaft: Tang claw shaft, Tapered key shaft, spline shaft |
Front cover: 4-bolt rectangular flange, 4-bolt square flange, 2-bolt SAE flange |
Application: construction machine, agriculture machine, hydraulic system |
Valve option: Pressure Relief Valve, Flow Control valve |
Shaft seal: V (-10ºC~120ºC), H (-40ºC~80ºC), T (3~6bar), N (3~10bar) |
Welcome to China, Welcome to Shanghai, welcome for your visit!
                                                                    GRH TEAM
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