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GUORUI HYDRAULIC
GRH specializes in providing hydraulic components and solutions for hydraulic systems. With over 30 years of continuous improvement and enthusiasm, GRH has become a rising power in the fluid power industry since its establishment in 1986. Research and development are the driving force behind our ability to create new products. Our guiding principles include standards like TS16949 and ISO14000. Employees' capabilities and creativity are key factors that set us apart from competitors.
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. We are also willing to work with customers to develop specialized products tailored to their unique needs. Our customers can rely on GRH's extensive system design and application experience when designing their hydraulic systems.
GRH has developed a series of load-sensing proportional stackable valves, which enhance valve operating performance and system efficiency.
GRH (Shanghai) - International Sales Office
GRH (Jiangsu) - Manufacturing Facility and Domestic Sales Office
Production Description
Major Technical Data
Rated flow rate:
45 L/min
Maximum flow rate:
100 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
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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
One piece in one box 
Our Services
GRH currently has over 300 employees, including 51 technical staff. The company's fixed assets amount to RMB 42 million, and it occupies a 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, and Testing Center; as well as Gear Pump and Motor Plant, Hydraulic Valve Plant, Heat Treatment Plant, and System Plant.
GRH will work together with customers to create a better future
Partnership
John Deere | Mahindra Terex | HYDAC EATON | NEW HOLLAND 
FAQ
Q: What is our main application?
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A: 1. Hydraulic system
2. Agricultural machine
3. Construction machine
4. Automobile
5. Local distributors
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Q: What is the payment terms?
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Full order: 30% deposit, balance before shipment
Small order/sample order: Full payment in advance
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Q: Can I mark my own brand on the pump?
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A: Yes. Full orders should be marked with your brand and code.
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Q: What is our main export market?
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A: America (45.5%): 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%)
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Details:
Material:
Cast iron covers and aluminum body / full aluminum / 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 (-10°C~120°C), H (-40°C~80°C), T (3~6bar), N (3~10bar)
Welcome to China, Welcome to Shanghai, welcome for your visit!
                                                                    GRH TEAM
45lpm Hydraulic Monoblock Directional Control Valves with 2 Spools
Company Information