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Mobile Filter Systems

For servicing several systems, there are convenient mobile units for particle filtration: Portable filtration units Mobile filtration units

Benefits:

Filling and flushing is clean and efficient Flexible since they can be used on different systems Relieves the main filters Greater system availability Reduction in the Life Cycle Cost With its water extraction systems, Central Qld Hydraulics offers an extensive range of professional solutions for the oil maintenance of your lubrication and hydraulic fluids in off-line filtration applications.

Recommended areas of application include:

Machine tools Plastic injection moulding machinery Ship locks Construction machinery Power stations Presses Paper machinery Steel mills / rolling mills

Measurement/Analysis Systems

Central Qld Hydraulics offers a comprehensive range of easy-to-use measurement and analysis equipment. It is ideal for dealing with particle or liquid contaminants, no matter whether sporadic checks or permanent installation is required, whether in the laboratory or in the field. Central Qld Hydraulics offers the right tool for every application: Fluid sensors (to measure particle contamination and water saturation) Sampling systems Laboratory equipment Component analysis equipment Software and controls

Benefits:

Availability of systems and components can be planned Prevention of sudden breakdowns Reduction of operational costs Prevention of catastrophic damage to systems and the subsequent supply shortages Preventative and condition-based maintenance

De watering/Degassing Systems

Central Qld Hydraulics has both mobile and stationary fluid service systems. De-watering uses vacuum or coalescence techniques Elimination of acids and oil ageing products Degassing and servicing transformer oil Removal of oil from water
fullanalysis analysis3 analysis4 analysis2 analysis1 pod transfer analysis trolley

Filtration

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Copyright © 2018, Central Queensland Hydraulics Pty.Ltd. - Contact our Webmaster
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At Central Queensland Hydraulics our objective is to optimise the reliability of your hydraulic and lubrication assets and keep your plant operating at peak productivity. Our innovative filtration products solve a range of contamination challenges including lube oil varnish, phosphate ester fluid maintenance, servo valve failures, gearbox filtration, oil reclamation, particulate contamination, removing water from oil, and many more. Our expertise and shoulder to shoulder commitment to solving your fluid contamination challenges set Central Queensland Hydraulics apart. Make us a part of your lube team and we'll help you develop a total system cleanliness approach to yield a more reliable plant and keep your world turning.

Suction filters

Suction filters serve to protect the pump from coarse fluid contamination which can cause a sudden pump failure. Due to the risk of cavitation of the pump, relatively coarse filter materials with a filtration rating of > 25 μm are used. For this reason, suction filters are not suitable for ensuring the component protection necessary for the economical operation of the system.

Pressure filters

Pressure filters are fitted after the pump and they are sized for the system pressure and the flow rate of the pressure line in which they are installed. Pressure filters are particularly suitable for protecting sensitive components, located directly after the filter, such as servo valves. High pressure filters must withstand the maximum system pressure and the fatigue strength must also be guaranteed owing to the frequent pressure peaks in the system in many cases. Pressure filters must always be fitted with a clogging indicator. Before particularly critical components, only in-line filters without bypass valves should be used. Such filters must be fitted with a filter element which must itself be able to withstand higher differential pressures without sustaining any damage. The filter housings must withstand the maximum dynamic system pressure.

Return line filters

Return line filters are located in the return line as an inline filter or as a tank-mounted filter on the tank or in the tank. This means that the operating fluid coming from the system flows back into the tank completely filtered. Therefore all contamination particles are filtered out of the fluid before reaching the tank. When selecting the correct filter size, the maximum possible flow rate must be taken in account. This corresponds to the area ratio of piston to piston minus the rod of hydraulic cylinders and can be greater than the flow rate generated by the pumps. In order to avoid possible foaming of the fluid in the tank, make absolutely sure than the fluid outlet from the filter is always below the fluid level in all operating conditions. It may be necessary to fit a pipe or a flow rate diffuser in the filter outlet. It is important that the distance between the floor of the tank and the end of the pipe is no less than two to three times the pipe diameter. Return line filters can be fitted with breather filters as additional equipment.

Return line & suction boost filters

The return line & suction boost filter was designed primarily for mobile machines with working hydraulics (e.g. extending and retracting cylinders) and drive hydraulics. These filters have the advantage that filtered oil at a pressure of approx. 0.5 bar is supplied to the charge pump of the traction drive, which reduces the risk of cavitation in the charge pump and therefore provides excellent cold start characteristics. In order to maintain the initial load of approx. 0.5 bar at the connection to the charge pump, a surplus of at least 10% between the return line volume and the suction volume is required under all operating conditions. Through the use of a pressure relief valve, when the ?p reaches 2.5 bar, the oil flows directly into the tank (no bypass to the closed circuit). If, in addition to the flow from the open circuit, the leakage oil from the hydrostatic drive also goes through the filter, then the permissible pressure of the leakage oil at the filter must not be exceeded (taking into account the pressure drop of the leakage oil lines, of the oil cooler and of the pressure relief valve) to protect the radial shaft seal rings.

Off-line filter

In hydraulic systems with heavy loads, additional off-line filters are used increasingly to avoid the accumulation of fine particles. In contrast to main filters, only part of the whole flow in the system is filtered by off-line filters. Excellent oil cleanliness levels can be achieved through continual filtration, regardless of the operating cycle of the machine. In addition, the main filters are relieved, meaning that element changing intervals can be extended. Off-line filter systems should be used in addition to main filters. In this case the main filter should be sized as a protective filter, i.e. filtering less finely and without a bypass valve.

Tank breather filter

Tank breather filters are one of the most important components in filter design. As a result of changes in temperature and of using cylinders or accumulators, the oil level in the tanks of hydraulic and lubrication systems is subject to constant fluctuations. The resulting pressure differential to the ambient is equalized by an exchange of air which means contamination can get into the tanks. The entry of contamination can be prevented by breather filters. Ideally the breather filter should be of at least the same filtration rating as the system filter in the hydraulic circuit. By using breather filters with double check valves, the air exchange between the tank and the ambient can be significantly reduced, minimizing the amount of contamination and dust entering the tank and increasing the service life of the breather filter. Where there are high temperature changes and high humidity, water also enters the tank.
circuit1 suction pressure return returnsuction offline tankbreather
Here you see a full working hydraulic circuit showing where dirt and contaminants can enter.
A typical hydraulic circuit highlighting the suction filter.
Here we have another hydraulic circuit showing the pressure filter. This must go before any control items to protect them from a pump failure.
Another circuit indicating the return filters place in the line of flow. This must be after all control items but before the tank.
The return line and suction boost filter is a little more complicated as it not only returns filtered oil to the tank, it supplies filtered oil to the charge pump of the main pump.
An offline filter is completely independant of the main circuit.
The tank top breather filter prevents dirt entry into the hydraulic tank.

CENTRAL QUEENSLAND HYDRAULICS

As well as selling new parts and components, we also service and rebuild all the products we sell. We have a comprehensive spare parts and exchange parts service. And all work is guaranteed.
We supply all filters from any manufacturer We have a comprehensive filter service. And all work is guaranteed.
All types of hydraulic tooling. Hydraulic cylinders of all shapes and sizes. Hydraulic fittings and hoses.
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Home Products Filtration Service & Repairs Hire Distributorships Quality & Safety Profile Contact Us Filtration headerline

Mobile Filter Systems

For servicing several systems, there are convenient mobile units for particle filtration: Portable filtration units Mobile filtration units

Benefits:

Filling and flushing is clean and efficient Flexible since they can be used on different systems Relieves the main filters Greater system availability Reduction in the Life Cycle Cost With its water extraction systems, Central Qld Hydraulics offers an extensive range of professional solutions for the oil maintenance of your lubrication and hydraulic fluids in off-line filtration applications.

Recommended areas of application include:

Machine tools Plastic injection moulding machinery Ship locks Construction machinery Power stations Presses Paper machinery Steel mills / rolling mills

Measurement/Analysis Systems

Central Qld Hydraulics offers a comprehensive range of easy-to-use measurement and analysis equipment. It is ideal for dealing with particle or liquid contaminants, no matter whether sporadic checks or permanent installation is required, whether in the laboratory or in the field. Central Qld Hydraulics offers the right tool for every application: Fluid sensors (to measure particle contamination and water saturation) Sampling systems Laboratory equipment Component analysis equipment Software and controls

Benefits:

Availability of systems and components can be planned Prevention of sudden breakdowns Reduction of operational costs Prevention of catastrophic damage to systems and the subsequent supply shortages Preventative and condition-based maintenance

De watering/Degassing Systems

Central Qld Hydraulics has both mobile and stationary fluid service systems. De-watering uses vacuum or coalescence techniques Elimination of acids and oil ageing products Degassing and servicing transformer oil Removal of oil from water
fullanalysis analysis3 analysis4 analysis2 analysis1 pod transfer analysis trolley

Filtration

Flare
Copyright © 2013, Central Queensland Hydraulics Pty.Ltd. - Contact our Webmaster
Oil drop
At Central Queensland Hydraulics our objective is to optimise the reliability of your hydraulic and lubrication assets and keep your plant operating at peak productivity. Our innovative filtration products solve a range of contamination challenges including lube oil varnish, phosphate ester fluid maintenance, servo valve failures, gearbox filtration, oil reclamation, particulate contamination, removing water from oil, and many more. Our expertise and shoulder to shoulder commitment to solving your fluid contamination challenges set Central Queensland Hydraulics apart. Make us a part of your lube team and we'll help you develop a total system cleanliness approach to yield a more reliable plant and keep your world turning.

Suction filters

Suction filters serve to protect the pump from coarse fluid contamination which can cause a sudden pump failure. Due to the risk of cavitation of the pump, relatively coarse filter materials with a filtration rating of > 25 μm are used. For this reason, suction filters are not suitable for ensuring the component protection necessary for the economical operation of the system.

Pressure filters

Pressure filters are fitted after the pump and they are sized for the system pressure and the flow rate of the pressure line in which they are installed. Pressure filters are particularly suitable for protecting sensitive components, located directly after the filter, such as servo valves. High pressure filters must withstand the maximum system pressure and the fatigue strength must also be guaranteed owing to the frequent pressure peaks in the system in many cases. Pressure filters must always be fitted with a clogging indicator. Before particularly critical components, only in-line filters without bypass valves should be used. Such filters must be fitted with a filter element which must itself be able to withstand higher differential pressures without sustaining any damage. The filter housings must withstand the maximum dynamic system pressure.

Return line filters

Return line filters are located in the return line as an inline filter or as a tank-mounted filter on the tank or in the tank. This means that the operating fluid coming from the system flows back into the tank completely filtered. Therefore all contamination particles are filtered out of the fluid before reaching the tank. When selecting the correct filter size, the maximum possible flow rate must be taken in account. This corresponds to the area ratio of piston to piston minus the rod of hydraulic cylinders and can be greater than the flow rate generated by the pumps. In order to avoid possible foaming of the fluid in the tank, make absolutely sure than the fluid outlet from the filter is always below the fluid level in all operating conditions. It may be necessary to fit a pipe or a flow rate diffuser in the filter outlet. It is important that the distance between the floor of the tank and the end of the pipe is no less than two to three times the pipe diameter. Return line filters can be fitted with breather filters as additional equipment.

Return line & suction boost filters

The return line & suction boost filter was designed primarily for mobile machines with working hydraulics (e.g. extending and retracting cylinders) and drive hydraulics. These filters have the advantage that filtered oil at a pressure of approx. 0.5 bar is supplied to the charge pump of the traction drive, which reduces the risk of cavitation in the charge pump and therefore provides excellent cold start characteristics. In order to maintain the initial load of approx. 0.5 bar at the connection to the charge pump, a surplus of at least 10% between the return line volume and the suction volume is required under all operating conditions. Through the use of a pressure relief valve, when the ?p reaches 2.5 bar, the oil flows directly into the tank (no bypass to the closed circuit). If, in addition to the flow from the open circuit, the leakage oil from the hydrostatic drive also goes through the filter, then the permissible pressure of the leakage oil at the filter must not be exceeded (taking into account the pressure drop of the leakage oil lines, of the oil cooler and of the pressure relief valve) to protect the radial shaft seal rings.

Off-line filter

In hydraulic systems with heavy loads, additional off-line filters are used increasingly to avoid the accumulation of fine particles. In contrast to main filters, only part of the whole flow in the system is filtered by off-line filters. Excellent oil cleanliness levels can be achieved through continual filtration, regardless of the operating cycle of the machine. In addition, the main filters are relieved, meaning that element changing intervals can be extended. Off-line filter systems should be used in addition to main filters. In this case the main filter should be sized as a protective filter, i.e. filtering less finely and without a bypass valve.

Tank breather filter

Tank breather filters are one of the most important components in filter design. As a result of changes in temperature and of using cylinders or accumulators, the oil level in the tanks of hydraulic and lubrication systems is subject to constant fluctuations. The resulting pressure differential to the ambient is equalized by an exchange of air which means contamination can get into the tanks. The entry of contamination can be prevented by breather filters. Ideally the breather filter should be of at least the same filtration rating as the system filter in the hydraulic circuit. By using breather filters with double check valves, the air exchange between the tank and the ambient can be significantly reduced, minimizing the amount of contamination and dust entering the tank and increasing the service life of the breather filter. Where there are high temperature changes and high humidity, water also enters the tank.
circuit1 suction pressure return returnsuction offline tankbreather
Here you see a full working hydraulic circuit showing where dirt and contaminants can enter.
A typical hydraulic circuit highlighting the suction filter.
Here we have another hydraulic circuit showing the pressure filter. This must go before any control items to protect them from a pump failure.
Another circuit indicating the return filters place in the line of flow. This must be after all control items but before the tank.
The return line and suction boost filter is a little more complicated as it not only returns filtered oil to the tank, it supplies filtered oil to the charge pump of the main pump.
An offline filter is completely independant of the main circuit.
The tank top breather filter prevents dirt entry into the hydraulic tank.