Danfoss PVG Combinations

Danfoss PVG Combinations



Danfoss PVG combinations with the modular concept PVG family provide combined valve solutions and give power, performance, and flexibility. The modular concept of the PVG family gives you the advantage of customizing your valve solution to fit your exact application requirements. We offer solutions which makes it possible to combine the Danfoss PVG 100 with the Danfoss PVG 32 and to combine the Danfoss PVG 120 with the Danfoss PVG 32 – ideal for vehicles with diverse requirements.


Flexible system design

The modular design of our PVG range accommodates future control variations and provides an almost infinite number of configurations. As a result, we are able to offer you integrated function solutions that are perfectly customised for your vehicle. As all PVG parts are interchangeable, valve specifications can be easily altered to accommodate new functions and meet rapidly changing market needs.


Machine Benefits include:

  • Customised valve solution to match your exact machine requirements.
  • Load-independent flow control for precise operation and improved productivity.
  • Load-sensing technology for higher efficiency, safety, reduced energy consumption, and longer system lifetime.






To view in full detail the Danfoss PVG family including the PVG 16, PVG 32, PVG 100, PVG 120 and the PVG 128/256 proportional valves, please read the below blog:



Also please see the link below to the official Danfoss PVG information document:



We are an official sales partner of Danfoss.

For more information on any Danfoss products, please call or email our highly technical sales team on T: 01709 821 002 or email sales@neilson-hydraulics.co.uk

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How does a Hydraulic Power Unit (HPU) Work?


How does a Hydraulic Power Unit Work? By utilising fluid to transmit power from one location to another, hydraulic power packs can generate large amounts of power, which in turn can be used to drive hydraulic machinery.

Another way to think of a hydraulic power unit is that it is a portable power delivery system that holds energy for a hydraulic mechanism. A good analogy to think what a hydraulic power pack is, is to consider the role of an electric battery, which stores energy for a circuit to draw on when is required. HPU’s are used in a wide range of industrial applications and machines, especially where there is no direct access to a power source.

A Hydraulic Power Unit in basic terminology, is a self-contained unit that consists primarily of a prime mover (either an engine or electric motor) a hydraulic pump, a valve and a hydraulic tank reservoir.


How is hydraulic power unit required power calculated?

Hydraulic power is defined as flow multiplied by pressure. The hydraulic power supplied by a pump is: Power = (P x Q) ÷ 600 – where power is in kilowatts [kW], P is the pressure in bars, and Q is the flow in litres per minute. ** based upon 100% efficiency; 90% efficiency would equate to 75 ÷ 0.9 = 83.3kW.


What Are Hydraulic Power Units used for?


Hydraulic Power Pack Manufacturer

At Neilson Hydraulics, we have vast technical experience built over decades of designing and manufacturing bespoke HPU’s from concept to completion, for all sizes and budgets, in order to help the customer with their aim and objective.


 Examples of Hydraulic Power Units we have produced:


 A Hydraulic Power Unit designed and built at Neilson Hydraulics featuring:


  • 55kW fixed displacement
  • up to 130 lpm flow
  • 300 bar with cooler.


Hydraulic Power Unit






A twin 110kW Power Pack with bespoke manifolds designed and built at Neilson Hydraulics. 




Hydraulic Power Unit










A 44kW Diesel Power Pack, with Danfoss K-frame Pump capable of 200 bar working pressure, and 100 lpm working pressure.




Hydraulic Power Unit



Key features of the Hydraulic Power Pack include:

  • 300 litre hydraulic tank.
  • Load sensing power unit with online hydraulic cooler.
  • Full bunded frame, fork truck lifting points, lifting eyes complete with load test certificate.
  • Completed with full enclosure, lockable doors and vented panels.





At Neilson Hydraulics, we can help you with all your hydraulic requirements and needs. To enquire about our Hydraulic Power Packs, please call 01709 821002, email: sales@neilson-hydraulics.co.uk or visit:https://www.neilson-hydraulics.co.uk/hydraulic-power-packs.html

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Top Tips for Hydraulic Power Pack Maintenance

Hydraulic Power Pack


Top Tips for Hydraulic Power Pack Maintenance. Hydraulic Power Pack maintenance is key to maximising hydraulic system uptime. By implementing a thorough hydraulic maintenance program, application downtime can be kept to a minimum.

The hydraulic power pack is at the heart of hydraulic systems providing pressure and flow to operate hydraulic cylinders (linear motion) and hydraulic motors (rotary motion) which in turn produces power to drove complex heavy machinery.

With all the work they do, proper hydraulic power pack maintenance care is critical. Without it, you risk damaging the components, losing efficiency, and causing safety hazards.


 Number 1 Top Tip: Oil Cleanliness!

Hydraulic Oil Samples













50-70% of all hydraulic system failures can be linked to contamination! Maintaining an appropriate level of oil cleanliness is critical to the success of the hydraulic systems in any heavy equipment operation.


Three types of Hydraulic Maintenance


There are three main types of hydraulic maintenance: reactive maintenance (RM)preventive maintenance (PM) and predictive maintenance (PdM).

Reactive maintenance stands for breakdown maintenance and involves the repairs that are done to fix the equipment that is already broken.

Preventive maintenance is regular maintenance that is performed on the equipment to prevent it from breaking down. Preventive Maintenance is implemented through a Preventive Maintenance Program.

Predictive Maintenance or condition-based maintenance uses sensor devices to collect information about the system and components and prompts the personnel to perform maintenance at the exact moment when it’s needed. Due to high costs and technical requirements, it is still new to the market and not used very often.


10 Top Tips for Hydraulic Preventative Maintenance

(Ensure you carry out the appropriate risk assessment before undertaking any HPP maintenance procedures.)

  1. Listen to the pump for making any unusual noise. The noise may be a sign of cavitation. Cavitation is the formation of bubbles or so-called cavities in the hydraulic fluid and is caused by the air that gathers in the areas of relatively low pressure around an impeller. It damages the pump, decreases the flow, and causes vibration if not treated.
  2. Check system temperature using a built-in or spot infrared thermometer. If the temperature is higher than recommended by the manufacturer, check the condition of the cooler and relief valve settings.
  3. Sample hydraulic fluid for colour, visible signs of contamination, and odour.
  4. Inspect hydraulic hoses, tubing, and fittings for leaks and frays. Remember that any leakage is an environmental and safety hazard since hydraulic fluid gets hot inside the system and is highly toxic. If the fluid level gets too low, the system will operate at reduced capacity and will get overheated.
  5. Check breather caps, filters, and fill screens.
  6. Inspect inside of the hydraulic reservoir for any signs of aeration. Use a flashlight and investigate the fill hose for any signs of foaming or small whirlpools. Aeration may be a sign of a leak in the suction line or faulty shaft seals, so it’s important to inspect the reservoir on a regular basis.
  7. Check hydraulic fluid levels. Add hydraulic fluid of the same brand and viscosity grade if needed using portable filters when applicable.
  8. Inspect proportional/servo valves for overheating. High temperature means that the valve is sticking.
  9. Scan the electric drive motor with a handheld infrared thermometer for hot spots.
  10. Check return/pressure/hydraulic filter indicators and pressure gauges for readings.


Please also read our blog on: What is a hydraulic power unit?


To help you with your hydraulic power pack maintenance, please contact our experienced technical team at Neilson Hydraulics on 01709 821002/ E: sales@neilson-hydraulics.co.uk or visit our website at:https://www.neilson-hydraulics.co.uk/hydraulic-power-packs.html

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What is a Des-Case Desiccant Breather?

What is a Des-Case Desiccant Breather? Des-Case Desiccant Breathers are a vital step in oil contamination control and the first line of defence against lubricant contamination. Studies have shown 50-70% of lubricant contamination can come from outside the equipment.

As most machines are designed to ‘breathe’, protecting the source of airflow from moisture and particulate contamination is vital. Des-Case Breathers attack the source of contamination, making the products an affordable and cost-effective solution to extend lubricant life and to increase equipment productivity.


How it works?

Des-Case Desiccant Breathers replace the standard dust cap or OEM breather cap on equipment, incorporate a high capture-efficiency filter to help sustain desired cleanliness levels by removing even minute particulate matter. They also create low relative humidity levels in the headspace, making condensation and absorption by the lubricant unlikely. When a system is properly fitted with a breather containing drying and filtration media, the contaminant ingression is greatly reduced.


The key benefits of Des-Case Desiccant Breathers include:

  • Removes moisture in the headspace of equipment.
  • Eliminates rust-forming condensation.
  • Prevents sludge deposits and water-contaminated oil.
  • Prevents contamination ingress.
  • Provides longer lubricant life.
  • Reduces wear and tear on equipment, prolongs life.




Every Des-Case Breather has been designed to work in a wide variety of industries and applications, using quality, rugged materials and innovative designs in technology.



Des-Case Desiccant Breather Family

(The Des-Case Desiccant Breather family)


Des-Case’s contamination control products are used in a wide range of applications, including gearboxes, hydraulic and lube oil reservoirs and storage/process tanks.


Other blogs you may also be interested in:

Product Spotlight – Des-Case Standard Series Desiccant Breathers

Discover Des-Case VentGuard Breathers

Des-Case HydroGuard Breather



To enquire about the Des-Case range, please contact Neilson Hydraulics on: 01709 821002  / E: sales@neilson-hydraulics.co.uk or visit our website at: http://www.neilson-hydraulics.co.uk/store/des-case?zenid=64d86839c23ec05eb8fb0096e2cc6d58


We stock and supply a range of DES-CASE Breathers and DES-CASE accessories, including DES-CASE Standard Desiccant Breathers, DES-CASE Hydroguard® Hybrid Breathers, DES-CASE VentGuard™ Hybrid Breathers, DES-CASE Extreme Duty Breathers, DES-CASE Non-Desiccant Breathers and DES-CASE Breather Adaptor & Accessories.

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How do Hydraulic Pumps Work?

A10 Hydraulic Pump



How do hydraulic pumps work? Fundamentally, a hydraulic pump is a mechanical device that converts mechanical power into hydraulic energy. It generates flow with enough power to overcome pressure induced by the load.


When a hydraulic pump operates, it performs two functions. First, its mechanical action creates a vacuum at the pump inlet, which allows atmospheric pressure to force liquid from the reservoir into the inlet line to the pump. Second, its mechanical action delivers this liquid to the pump outlet and forces it into the hydraulic system.


A pump produces liquid movement or flow, it does not generate pressure. It produces the flow necessary for the development of pressure, which is a function of resistance to fluid flow in the system. For example, the pressure of the fluid at the pump outlet is zero for a pump not connected to a system (load). Further, for a pump delivering into a system, the pressure will rise only to the level necessary to overcome the resistance of the load.


Types of Hydraulic Pumps

In mobile hydraulic applications there are typically three types of hydraulic pumps used. These include gear, piston and vane pumps.




Hydraulic Gear Pumps



Hydraulic Gear Pump




Hydraulic gear pumps convert mechanical power into the hydraulic energy of the fluid. The rotation of the gear causes the suction at the inlet and fluid is transferred by the pump. The fluid flows over the gears. The mechanical energy by the rotation of gears is transferred into the fluid pressure at the discharge.


At Neilson Hydraulics we stock a large quantity of Bosch Rexroth products but also with our sister company VHS Hydraulic Components we have access to stock of numerous brands of gear pumps including Casappa, Dana Brevini and the OT gear pumps.


Hydraulic Piston Pumps

The piston pump is a hydraulic pump that delivers optimum efficiency and reliability while maintaining a compact size with a high power density. Hydraulic piston pumps can handle large flows at high hydraulic system pressures.


In these pumps, the pistons accurately slide back and forth inside the cylinders that are part of the hydraulic pump. The sealing properties of the pistons are excellent, which makes it possible to operate at high pressures with low fluid leakage. Piston pumps are the hydraulic pumps with the highest-pressure rating and best overall efficiency.


At Neilson Hydraulics we stock and supply the Bosch Rexroth flagship A10VO variable displacement piston pump and also as part of a large group with our sister company Parmafluid the A17FO axial piston fixed displacement pump plus many more Bosch Rexroth products.

A17FO Axial Piston Fixed Displacement Pump



Type of Piston Pumps

  • Axial piston pump, fixed displacement
  • Axial piston pump, variable displacement
  • Radial piston pump, fixed displacement
  • Radial piston pump, variable displacement


Hydraulic Vane Pumps

Vane pumps are hydraulic pumps that operate at very low noise levels. Vane pumps tend to be a compromise between gear and piston pumps. They are limited by their maximum pressure rating and this is a sign of their relative fragility to gear and piston pumps. Hydraulic vane pumps operate with much lower flow pulsation, i.e. constant flow. As such, vane pumps produce less noise while maintaining a relatively high speed of up to 3,000 rpm.


As a group with our sister companies VHS Hydraulic Components and Parmafluid, we supply the entire range of hydraulic Bosch Rexroth vane pumps including the PV7 Vane pumps for use on a wide range of industrial manufacturing applications.




To enquire or speak to our technical team about all your hydraulic pump or hydraulic problems please contact Neilson Hydraulics on: 01709 821002/ E: sales@neilson hydraulics.co.uk or visit our website at: www.neilson-hydraulics.co.uk.

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Bosch Rexroth Hydraulic Cylinders

Bosch Rexroth hydraulic cylinders are built to work in the toughest conditions. Developing solutions in partnership with customers has allowed Rexroth to continually create and expand their portfolio of hydraulic cylinders that meet global safety standards for any environment you work in. Rexroth has rendered hydraulics even more capable, from mill-type to tie-rod hydraulic cylinders that provide safe and reliable lifting. This gives you smarter, reliable cost-optimized solutions with an extended lifecycle and intelligent components.


Hydraulic Cylinders



‘As a newly appointed Bosch Rexroth Certified Excellence sales partner, we are proud to offer the Bosch Rexroth hydraulic cylinders in our product range.’


Bosch Rexroth Logo


Discover the Bosch Rexroth Hydraulic Cylinder Range


Mill Type Cylinders

These robust and reliable mill type hydraulic cylinders are built for heavy-duty use and have been tried, tested and remained stable in even the most extreme conditions. The Rexroth mill type cylinder range comprises both, screwed and welded cylinders.






  • Series H1, H2, H3, M1, L2
  • Nominal pressure 160 … 350 bar
  • Piston Ø 25 … 320 mm
  • Maximum stroke length 6000 mm


Mill Type Cylinder Configurator.


Tie Rod Cylinders

The tie rod hydraulic cylinders are primarily used in the machine tool industry and in production of the automobile industry. Due to their smaller installation dimensions, hydraulic tie rod cylinders – similar to welded mill type hydraulic cylinders, can be used in very limited installation spaces.






  • Series 70, 210, T3
  • Nominal pressure 70 … 210 bar
  • Piston Ø 25 … 200 mm
  • Maximum stroke length 3000 mm


Tie Rod Cylinder Configurator



At Neilson Hydraulics we design, manufacture, and repair all hydraulic cylinder types. We offer quick, efficient turnaround on repairs of general hydraulic cylinders, providing a detailed quotation, test certificate and serial number.


Read our previous blog on Hydraulic Cylinder Types.



We are a Certified Excellence Bosch Rexroth Sales Partner.


To enquire about Bosch Rexroth hydraulic cylinders and our full Rexroth range, please contact Neilson Hydraulics on: 01709 821 002 or E: sales@neilson-hydraulics.co.uk or visit our website www.neilson-hydraulics.co.uk

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What are Hydraulic Power Packs used for?

Hydraulic Power Unit




What are Hydraulic Power Packs used for? Fundamentally, Hydraulic Power Packs are used in place of an integrated power supply for hydraulic machinery and are self-contained units. They are essential in a range of different situations, particularly for industrial work that takes place outdoors and away from any larger scale, integrated hydraulic system.


Advantages of Hydraulic Power Packs

  • They are an efficient transmitter of power. It is easy to control the power transmitted as they have simple levers, push buttons that make it easy to start/stop or accelerate/decelerate as and when required.
  • They can cope with a large weight range. Hydraulic power packs are made without gears, pulleys or levers, which allows it to easily cope with a vast range of weight.
  • Maintenance is simpler as there are less moving parts as compared to mechanical systems. There are also fewer leak points, which makes them more economical, safer and simpler systems.
  • Lower wastage of power since the power transmitted is controlled by simple buttons and levers.
  • They are compact in design, which make them ideal for places where the large sources of power are required, but only limited space is available for a power source.
  • Hydraulic systems are safe to use in chemical plants and mines because they do not cause sparks.


Hydraulic Power Unit















How Do I Choose a Hydraulic Power Pack?


As an overview the performance specifications to consider when selecting hydraulic power units include, operating pressure, flow, total power, reservoir capacity and also what is your budget.


At Neilson Hydraulics, we are highly experienced Hydraulic Power Unit manufactures and have been designing, building, installing, and commissioning hydraulic power units for over 30 years. So, your first port of call should be to speak to our technical team to discuss your hydraulic requirements and how we can help with the solution.


We manufacture custom-made hydraulic power units that can be built strictly in accordance with the client’s specifications. We can provide a complete hydraulic solution from ‘concept to completion’. As a HPP manufacturer, we can provide repeat hydraulic power units, as we well as hydraulic power units for specialist projects. Utilising our technical abilities in 3D modelling, CAD, SolidWorks, system controls and hydraulic circuit design.


We have used our expertise and knowledge for projects spanning numerous sectors, including, recycling, oil, gas, marine, agricultural and construction to name a few.


Other Hydraulic Articles



At Neilson Hydraulic we can help you with all your hydraulic requirements and needs. To enquire about our Hydraulic Power Packs, please call 01709 821002, email: sales@neilson-hydraulics.co.uk or visit: https://www.neilson-hydraulics.co.uk/hydraulic-power-packs.html


Neilson Hydraulics is an official UK sales partner for Danfoss Hydraulics (Danfoss Power Solutions, Bosch Rexroth Hydraulics, Moveco Rotary Actuators, IMO Slew Drives and IMO Slewing Rings. We also supply Des-Case Breathers, Eaton Internormen Filters, SPX Power Team. The company also designs and manufactures a range of Hydraulic Power Packs and Hydraulic Power Units

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What does PVG stand for?

What does PVG stand for? PVG or Proportional Valve Group is a hydraulic load sensing valve designed to provide maximum flexibility. Neilson Hydraulics as an official sales partner of Danfoss hydraulics and with over 30 years technical experience in Danfoss hydraulics products, can help provide you with the solution you require.

Danfoss PVG Group Shot


Danfoss modular valve solutions take the most complex control challenge and put it to work. The broad valve range is designed for your machines most demanding tasks. The modular electrohydraulic valves provide an almost infinite number of configurations. Varying from simple load-sensing solutions to CAN bus communication – ensuring smooth machine control.


Whether you’re moving the largest of loads or need the precise control that feels like an extension of the operator’s own hand, the family of Danfoss PVG Proportional Valves can address your unique challenges while delivering increased machine productivity and keeping pace with today’s shorter product cycles.



The Danfoss PVG Products Range

PVG 16 Proportional Valves

Danfoss PVG 16 valve











Optimizes Productivity

Low-flow PVG 16 covers simple to complex needs. Proven technology and components for customized valve stacks. Benefit from load-sensing functionality made for the low-flow segment. PVG 16 optimizes productivity, lowers total system costs and facilitates fulfilment of emissions and safety regulations. Use with the PVE series 6 actuator for seamless integration in advanced electrohydraulic systems.


PVE series 6 actuator

Incorporating a microcontroller for closed loop control, PVE series 6 delivers excellent spool control and built-in fault monitoring to the PVG 16. High tolerance towards temperature variations ensures a robust, reliable valve performance in all conditions.


Key Applications

PVG 16 targets on a broad range of applications in the mobile machinery market. Typical applications are municipal vehicles, agricultural machinery, small cranes, construction machinery and road building applications.


Lower Total System Costs – machine benefits

  • Load-sensing technology for higher efficiency, safety, reduced energy consumption, and longer system life.
  • Optimized system architecture and unique machine features due to design flexibility and modular concept.
  • Improved efficiency obtained by precise matching of performance with flow requirements.
  • Reduced cooling and fuel requirements.
  • Low machine downtime supported by high quality products, modular concept and advanced product feedback.
  • Optimized production processes and less inventory due to modular concept and short delivery time.


Product Features

  • Flow rating up to 65 l/min [17.2 US gal/min].
  • Work port pressure up to 400 bar [5,800 psi].
  • Actuator with integrated float function for increased safety.
  • Actuator with closed loop control for built-in fault monitoring.
  • Symmetrical and asymmetrical spools.


PVG 32 Proportional Valves

Danfoss PVG 32 valve









Maximum Flexibility

The Danfoss flagship PVG 32 is designed for maximum flexibility. Proven PVG technology that saves you time. No matter which combination of valves is specified, the compact, external dimensions of the valve remain unchanged. Advanced electronic control can be achieved with our PVE electrohydraulic actuators.



By using PVG load-sensing technology in combination with a variable displacement pump, it’s possible to achieve a significant reduction in energy loss. PVG valves also reduce heat generation and increase efficiency and power density, which helps OEMs to meet the challenges posed by new diesel engine emissions legislation.


OEM and Machine Benefits

  • Modular design, providing a wide range of configuration possibilities.
  • Load-independent flow control for precise operation and improved productivity.
  • Load-sensing technology for higher efficiency, safety, reduced energy consumption, and longer system life.


Product Features 

  • Configurable as advanced electrically controlled proportional valve as well as load sensing directional control valve.
  • Prevention against work port pressure build up.
  • Individual work port pressure setting.
  • Zero-leakage work modules.
  • Open center and closed center versions available.
  • Modular design, which can be combined with PVG 100, PVG 120, PVG 16 and PVG 128/256.



PVG 128/256 Proportional Valves

Danfoss PVG 128/256 Valve









Modularity and Efficiency

For the most demanding applications, only the highest flow and the highest pressure will do. The PVG 128/256 are built to take control with up to 500 l/min per section supplied with up to 1200 l/min (300 US gal/min) pump flow.


Rock-solid control and optimum safety are more critical than ever when it comes to the biggest applications and the heaviest tasks. This new proportional (pre-compensated) load-sensing valve series can easily be built together with PVG 32 and PVG 16 making it easy to build a valve that is adapted to the flow needs of the most demanding application.


Application Opportunities

Go with our PVG 128/256 and optimize work functions on cranes, mining, drill rigs and marine applications like winches and bow thruster.


Machine Benefits

  • Smooth load-independent flow control for optimum productivity and precise operation.
  • Energy-efficient load-sensing technology for maximum safety and a long system life.
  • CAN bus control for lower installation cost and increased diagnostics.


Product Features

  • Optimized for lower pressure drop and higher efficiency.
  • Compact sectional platform solution for easy integration with PVG 16 and PVG 32.
  • Compact design, easy installation and serviceability.
  • Individual LS A/B relief valves ensure energy efficient, safe and reliable operation.
  • Mechanical actuation as default on all valve sections.
  • Hydraulic actuation.
  • Electrohydraulic actuators PVE (Ratio metric, 0-10V, CANbus) as well as PVHC (High Current PWM) actuators.


The Danfoss PVG portfolio also includes the PVG 100 and the PVG 120.



We are an official Danfoss Sales Partner


Neilson Hydraulics is an official UK Danfoss Sales Partner.

To enquire about Danfoss PVG Proportional Valves, please call 01709 8210002, email: sales@neilson-hydraulics.co.uk or visit: https://www.neilson-hydraulics.co.uk/store/sauer-danfoss

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Bosch Rexroth On/Off Hydraulic Valves

Bosch Rexroth offer the largest range of on/off hydraulic valves than any of its competitors and for all types of applications. From isolator and pressure valves to flow control and directional cartridge valves, as an official Bosch Rexroth distributor and as part of a large hydraulic group with our sister companies VHS Hydraulic Components, Parmafluid, we can find exactly what you need for your optimal hydraulic solution.


The new Bosch Rexroth valve series featuring ISO 7368 standardized cavities carries the principle of modular design over to hydraulics. You can directly mount almost any LFA logic cover in the Rexroth standard program, which in turn allows you to create any hydraulic function imaginable. This increases flexibility for later modifications, as only the logic cover needs to be replaced to adapt the functionality to new requirements.


Bosch Rexroth Hydraulic On/Off Valves – Portfolio


Isolator Valves

Bosch Rexroth Isolator Valves



Bosch Rexroth Isolator Valves block the flow in one direction safely and leakage-free and simultaneously allow for free flow in the opposite direction (Check Valves, Prefill Valves and Shut-off valves).



Directional Valves

Bosch Rexroth Directional Valves


Bosch Rexroth Directional Valves control the flow direction and thus the direction of movement or rotation of hydraulic actuators (Directional Seat Valves or Spool Valves, Direct Operated or Pilot Operated).



Pressure Valves

Bosch Rexroth Pressure Valves


Bosch Rexroth Pressure Valves have a pre-determined effect on the operating pressure in a system or a part of a system (Pressure Relief Valves, Pressure Sequence Valves, Pressure Cut-off Valves and Pressure Reducing Valves).



Flow Control Valves

Bosch Rexroth Flow Valves


Bosch Rexroth Flow Control Valves control the flow and thus the speed of hydraulic actuators (Throttle Valves and Flow Control Valves).




2-Way Cartridge Valves

Boch Rexroth 2 Way Cartridge Valves


Bosch Rexroth 2-way Cartridge Valves are logic elements that have been designed for a compact block design. The power part is installed in a receiving hole of the manifold according to ISO 7368 and closed with a control cover.






To enquire about Bosch Rexroth On/Off Hydraulics Valves, please contact Neilson Hydraulics on: 01709 821 002 or E: sales@neilson-hydraulics.co.uk or visit our website www.neilson-hydraulics.co.uk


You can also view the Bosch Rexroth valve portfolio at: https://www.boschrexroth.com/en/xc/products/product-groups/industrial-hydraulics/topics/onoff-valves/

What Applications Are Slewing Rings Used In?

IMO Slewing Rings are used in numerous applications as machine elements that can simultaneously transmit axial and radial forces, as well as tilting moments. The application spectrum ranges from large triple-row roller slewing rings for tunnel construction to small ball slewing rings for medical technology. However, IMO Slewing Rings are used in the bottling and filling industry, opencast mining, bulk handling, and transport engineering. In the field of renewable energies, IMO blade bearings, yaw bearings, and main bearings are used in wind turbines or as rotor blade bearings in tidal stream systems.






Other examples of applications for IMO Slewing Rings in the industrial sector are:


·       Drilling

·       Factory Automation and Intralogistics

·       Marine Cranes

·       Public Transportation

·       Ship Deck Equipment

·       Tunnel Boring

·       And many more applications…


Please also read, IMO Slewing Ring for Cranes and Slewing Rings for Construction


But what is a Slewing Ring?

Slewing Rings are large diameter antifriction bearings for the simultaneous transmission of axial and radial forces as well as tilting moments. They replace traditional solutions with fixed and floating bearings as well as king pin bearings. Frequently, this results in bearings with axial/radial bearing combinations with one bearing point. This can significantly simplify the design of the mounting structure and the installation of the bearings, which in turn reduces effort and costs.


Cost-effective and tried-and-tested, IMO antifriction bearings are available as:


  • Ball slewing rings, roller slewing rings, and ball-roller combination slewing rings.
  • Four-point bearings, double four-point bearings/eight-point bearings, flange bearings, wire race bearings, cross roller bearings.
  • Segmented slewing rings.
  • Gear rims.
  • External gearing, internal gearing, or without gearing.
  • Diameter ranging from 100 mm to 6000 mm.
  • With cages (steel, brass, or plastic) or spacers (brass or plastic).
  • With standard seals or specially produced special seals.
  • Optionally with induction-hardened raceways.
  • Different corrosion protection coatings possible.


IMO Slewing Rings have mounting holes and a sealed raceway system with grease lubrication. They can be combined with motors, pinions, and planetary gears. Functions and parts of the mounting structure – such as attached bearing rings – can be integrated.



Neilson Hydraulics is an IMO UK distributor. Neilson Hydraulics supplies IMO Slew Drives, including IMO Slew Drives WD Series (WD-L & WD-H) and IMO Slew Drives SP Series (SP-I & SP-H), as well as IMO Slewing Rings, including IMO Ball Slewing Rings, IMO Roller Slewing Rings and IMO Ball-roller Combination Slewing Rings.


To enquire about IMO Slew Drives and IMO Slewing Rings, please contact Neilson Hydraulics on: 01709 821 002 / E: sales@neilson-hydraulics.co.uk or visit our website at:  https://www.neilson-hydraulics.co.uk/imo-slewing-rings.html

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