tractor hydraulic pump pressure made in china

Following ISO9000/TS16949 quality management system standards, GRH uses ERP production management systems to provide high quality hydraulic products for customers. To purse advanced technology, GRH is equipped with 305 sets of various machining centers and equipment, including a German high speed cutting center, American honing machine, special diamond boring machine and more. Strict processes and management keep the assembly process always under control. All the delivered products will be 100% tested and inspectors conduct sampling inspection according to international standards. Strict control over time, pressure, temperature, flow, stroke and other parameters ensures the quality stability and reliability of outgoing products.Advanced technologies, reliable quality and performance, and a meticulous service spirit allow GRH to be highly recognized by worldwide customers.

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Thanks to the radial configuration of its small piston pump elements, the radial piston pump is suitable for generating pressures of up to 700 bar. The elements are arranged in multiple rings, which enables the pump to generate higher flow rates with lower pulsation.

The type-LP pumps are valve-controlled, alternating plunger pumps based on the principle of a pneumatic-hydraulic pressure amplifier. Depending on the transmission ratio (surface ratio – hydraulic piston : pneumatic piston), they can attain hydraulic pressures of up to 630 bar at an air pressure of 6 bar, for example.

If you want to combine speed with powerful movements (rapid traverse – creeping), a compact, dual-stage system is the right choice for your application. A gear pump feeds the system with a high delivery flow at low pressure, and a radial piston pump with high pressure but a low delivery flow. The two pumps and flanged directly onto one another to form a compact unit.

The pump elements form the basis of the radial piston pump. When working in extremely tight spaces, they can also be installed separately. This allows the user to build almost any form of high-pressure system imaginable.

The double pump element type DMPE integrates both a low-pressure and a high-pressure piston. As soon as the low-pressure limit is reached, an in-built valve depressurises the low-pressure piston. Multistage pumps which can be adapted to a variety of demands can be designed by the user.

Many directional valves for high-pressure applications are designed as seated valves. These are zero-leakage and completely resistant to fluid contamination. The HAWE product range also includes other types of valve that allow you to safeguard or regulate the system pressure.

The valve bank type VB consists of several directional seated valves, connected in parallel. As a ball valve, it is tightly sealed with zero leakage in the closed state. 2/2, 3/2, 4/2, 3/3 and 4/3 directional seated valves can be provided. The valve bank can be fitted directly onto hydraulic power packs with connection blocks.

This is a zero-leakage, cone-seated valve. 2/2, 3/2, 4/2 and 4/3 way functions can be provided. Equipped with the NG6 (Cetop 3) standard connection pattern, the NBVP allows operating pressures of up to 400 bar. Additional options such as position monitoring and a 12 W solenoid are also available.

The BVP17-type directional seated valve can be operated as a 2/2, 3/2, 4/2 or 4/3-way valve at operating pressures of up to 700 bar. Direct actuation options include electro-magnetic, pneumatic and manual (hand lever).

Pressure-limiting valves reliably protect the hydraulic system from being subjected to excessive system pressure. The MV type comes in a wide range of designs and pressures of up to 1000 bar for the high-pressure range.

This valve can be actuated using electric proportional control. It is used for pressure limitation, and also to limit the load pressure on the actuators in the system. It is available as a manifold mounting and as a piping insert valve.

The RHC-type check valve is available as an insert valve in 6 different sizes. Thanks to its range of pilot ratios and optional hydraulic release, it can be used in similar applications to load-holding valves.

The KA-type compact hydraulic power pack is designed for intermittent operation. Its housing contains a tank, an oil-immersed motor, and a high-pressure or dual-stage pump. Valve banks of types BA and VB can be mounted directly on it to form an incredibly compact system solution.

The compact hydraulic power pack type HKL enables you to work in both intermittent and continuous operation. Here too, it is possible to mount valve banks of types BA and VB directly on the power pack. This type of power pack is used primarily for hydraulic tools.

For applications with more demanding flow rate requirements, the standard power pack type FXU is the perfect choice. Thanks to its simple modular configuration, it is available with many options as standard, including high-pressure functions.

HAWE Hydraulik’s Engineering and Installation team will help you with any problem, from application-specific manifolds to entire systems. We have already produced countless successful projects, including in the high-pressure range. Click here to find out more about SYSTEC solutions.

It is an LW7 knockoff, if not the exact model since so many of the Chinese factories build and market their own version of the LW7. It has an on board, PTO driven pump and tank. Right from the beginning, it had low power. I could not curl the bucket thru firm clay loam at a 6" deep bite. If I stretch out the boom and dipper to full horizontal extension, it struggles to pull it back up.

I removed the hose on the dipper and put a 5000 psi gauge on it. The dead head pressure bumps 1300 psi, then precipitously drops to 1000 psi in about 4 - 5 seconds and holds there. I can hear the rush of the pressure release bypass occurring. I adjusted the pressure relief valve, 1/2 turn clockwise; no change. Another 1/2 turn, no change. About 2 total turns and it was buried; no change. I disassembled the PRV all the way down to the check valve ball bearing. It was clean. I cleaned and blew everything out anyway and reassembled. No change. I disassembled and added a couple of small stainless steel washers to the top of the PRV spring to really push it down. No change. I removed the test washers, re-assembled, and gave up.

What next? How does one analyze these findings? Does any of this point to the pump as the culprit? I can find no ID on the pump, but I was told by the factory that it produces 2600 PSI and 8 gpm. These specs seem fair, but how do I know that it is actually working as designed?

Kubota has evolved alongside agriculture in Japan, and the company has worked to improve the performance of its rice farming machinery and refined these technologies. Leveraging its long track record and achievements, it entered the dry-field farming market to contribute to food production both domestically and worldwide. Dry-field farming covers crop acreage about four times that of rice farming, and while Kubota’s agricultural machinery, including the heavy-duty, high-horsepower tractors that it developed to address local needs, began to steadily gain acceptance throughout the global agricultural market, to achieve even greater performance meant that in-house production of a hydraulic system for dry-field farming would be inevitable.

Compared to rice farming tractors that work in paddy fields, dry-field farming tractors require greater amounts of power due to the many implements they use and the higher energy load required for working on hard soil. And in addition to the need for good responsiveness and more precise control of implements, environmental performance and fuel efficiency issues must also be solved. To meet these tall demands, the cost for developing hydraulic systems would inevitably be second only to engines, meaning that they also served as the key to cost competitiveness.

One reason behind the initiative to produce hydraulic systems in-house is that the agricultural machinery market is smaller than the automotive market, and there is little choice among suppliers looking to balance performance and cost. General-purpose products also had compatibility issues compared to exclusively-designed products, as well as limitations in terms of responsiveness and cost. What is more, Kubota was a latecomer to the North American and European dry-field farming markets, a fact that needed to be kept in mind. Implements have made technological progress particularly in the dry-field farming market, but major agricultural machinery manufacturers in North America and Europe have externally procured the hydraulic systems that can endure the diverse movements of implements. Given the established relationship between hydraulic system suppliers and major agricultural machinery manufacturers, the newcomer Kubota would not have an easy time obtaining hydraulic systems that could compete in terms of both performance and cost.

However, Kubota"s hydraulic equipment development team had been accumulating technology and experience through in-house production of key components since 1976. In other words, it was the unwavering efforts of those engineers that led to the development of Kubota"s unique hydraulic system.

Established in the year 2000, we have become one of the most supposed organizations engaged in manufacturing and supplying high grade High Pressure Piston Pump. The range of our products offered by us includes : Industrial Pumps & Motors, Rexroth Axial Piston Motor, Piston Variable Pumps, A4VSO Series Piston Pump, A11V Series Piston Variable Pump, Axial Piston Pumps, China Hydraulic Piston Pump Parts, External Gear Pump, Fixed Displacement Hydraulic Motor, Hydraulic Engine, Hydraulic Motor Wheel, Hydraulic Piston Pump, and Hydraulic Pump for Engineering and Orbital Motors. These pumps and systems are expansively used for meeting pumping various fluids and dangerous material in varied industrial purposes. Some of the exclusive features of our products are robustness, high tensile strength, sturdy construction, corrosion resistance and consistent serviceability. Further, clients can avail our complete variety in variegated shapes & sizes, depending upon their needs and application related necessities.