The term “high pressure” is usually used to refer to the pressure range above 450 bar. High pressure is primarily required in situations where heavy weights need to be moved or powerful movements need to be carried out with precision in tight spaces. High-pressure components can be used to build solutions with a high degree of weight and space optimisation. If a system can be expected to experience pressure peaks of up to 1000 bar, for example, high-pressure components are selected, as they can withstand these conditions without any problems. Not all typical hydraulic components are suited to high-pressure applications. We have put together a large selection using the HAWE Hydraulik modular system.
The high-pressure pumps from HAWE Hydraulik are characterised by their compact and robust design. They are suitable for demanding applications and very high pressure levels. Models suited to the high-pressure range include radial piston pumps, air-driven hydraulic pumps and dual-stage pumps.
Radial piston pump type R
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.
Valve bank (directional seated valve) type VB
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, ball seated valve. 2/2, 3/2, 4/2, 3/3 and 4/3 way functions are available. A suitable connection block makes a direct pipeline connection possible. The directional seated valves can also be provided as chained valves in a valve bank type VB.
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.
Here at HAWE Hydraulik, we can configure custom system solutions quickly and easily using our modular system. If our modular system doesn’t cover what you need, an experienced HAWE engineering team is ready to provide comprehensive assistance with your project, from consultation, design, installation and on-site commissioning to maintenance during operation. You can see a small selection of our range of products below:
Compact hydraulic power pack type KA
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.
Pmax: 700 bar (radial piston pump), 180 bar (gear pump)
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.
Pmax: 700 bar (radial piston pump), 180 bar (gear pump)
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.