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Understanding Hydraulic Pump Types and Differences

There are many types of machinery that are driven by or actuated by a hydraulic pump. There are a variety of different systems that are used to generate the flow and pressure required and they all have a hydraulic fluid and a system that controls the fluid and pressure with hydraulic valves. The pump needs to driven and this can be done by any force generating device such as an electric motor, an internal combustion engine, wind power or even a person operating a lever or crank.

How It Works
A hydraulic fluid is put under pressure by the hydraulic pump and the pressure can then be used to drive a piston or drive unit via hydraulic lines. A hydraulic valve is used to switch the force on and off to give control of the device. The control can be mechanical or electrical and may be actuated manually through a lever or a button or automatically through control system.

Volume and Pressure
There are many different hydraulic systems and they all used a combination of volume displacement and pressure to work. The higher the pressure the more robust a system needs to be because of the tremendous forces involved. In general higher pressure systems are more efficient and the higher the pressure the less flow is required for the same application of force. There are two general types of pumps fixed displacement types that displace the same amount of fluid every cycle and adjustable displacement types that can vary the displacement for increased or decreased pressure.

Pump Types
There are many different types of hydraulic pumps that have different applications. Screw type pumps are good for high volumes at relatively low pressure. They are simple and effective but not particularly efficient. A gear pump has a more balanced pressure and flow and is very simple but is not very efficient particularly as pressure increases.

The vane pump is widely used in system of medium pressure up to 150 bar and beyond. While the axial piston pump is used in applications that require the highest efficiency. Where high pressure above 300 bars is needed the radial piston pump combine high pressure and low flow rates needed in these applications.

Finding the Best Company to Fix and Maintain Vacuum Pump Systems

It is vital to the efficient and trouble free running of your production process to have your vacuum pump system regularly serviced so that any problems can be picked up before a part fails or efficiency is impacted. These devices work on the same principle as hydraulic pumps and have very tight tolerances and precision seals that can be easily damaged if maintenance is not kept up.

The Right Team
The need for specific parts make it vital that the company you choose has the experienced personnel that know the vacuum pump system you are using and which parts are most prone to failure or degradation. This can save a fortune in repair costs and down time by completely understanding the right preventative maintenance requirements so that early signs of wear or failure are picked up and dealt with before they become a problem.

Parts Availability
Generally pump systems are expensive and have a long lifetime when maintained properly. If your maintenance company has a large stock of vacuum and hydraulic pump parts then going forward you can be certain that you will have the parts on hand quickly if a problem develops or an unexpected failure happens.

Service Levels
Any vital piece equipment needs fast and efficient service and the company you select needs to have the resources to respond quickly when you need them. If you have to shut down operations for maintenance then punctuality and the ability to work out of standard hours can be vital. If you operate around the clock then it is important to have a company that has personnel available any time you have a problem.

Upgrades, Refurbishments and Repairs
The complexity and tight tolerances of vacuum pumps mean that a major failure or refurbishment will need to be done in the workshop. Does the company have the ability to exchange pumps, upgrade to newer models or to refurbish the current pumps and have them back in service quickly? These are important questions that will be vital down the track and are important to know so that when you need these major works you can plan accordingly.