Lubricators

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Symbol Oeler.pngLubricators are used to supply pneumatic consumers or other components 
                       with a defined amount of oil for the purpose of lubrication.


Task

 If it is necessary to work with lubricated compressed air, a lubricator must be used. Using lubricated compressed air, wear can for example be reduced or properties such as the smooth or slow running capabilities of pneumatic components can be supported. Over-lubrication, on the other hand can have negative consequences such as the clogging or gumming up etc. of drives, positioning elements, filters, silencers or other pneumatic elements.
An increasing number of users no longer wish to use lubricators. Festo components have life-time lubrication and can therefore be operated unlubricated. There are some components that must only be operated without lubrication (please refer to the catalogue specifications). However, in some situations we recommend lubricated compressed air, for instance with extremely fast cylinder movements. If components which are usually operated without lubrication are operated with lubricated air even just once, then the air must always be lubricated from then on because the oil washes away the life-time lubrication.

Function

Oeler.png


The oil is pumped from a reservoir and fed into the air flow a drop at a time. A regulating screw on the top enables the amount of oil that is required within a specific timeframe to be set. A sight glass is integrated in the air flow to monitor the function.
To top up the oil, the pressurised oil reservoir has to be vented. This is done via a special valve on the lubricator, which exhausts automatically when opened.
The prevailing working pressure in the oil reservoir forces the oil through the supply tube. The oil initially passes along a duct into the sight glass, where it simultaneously passes a flow control valve to adjust the amount of oil. It is then fed a drop at a time into the intake duct of the Venturi nozzle, ensuring a fine spray into the compressed air.
The air flowing through the lubricator passes through a pneumatic distributor before lubrication. This is made up of a specially shaped membrane, the shape of which changes the flow accordingly. The interaction between the Venturi nozzle and the shape-dependent air resistance of the distributor ensures that the air is lubricated proportionally to the flow rate.

Oil

We recommend the following type of oil:
Festo special oil (1l container), type OFSW-32, order no. 152 811

Other appropriate oil types: (viscosity range: 32 mm²/s (=cSt) at 40°C; ISO class VG 32 to ISO 3448

  • ARAL Vitam GF 32
  • BP Energol HLP 32
  • Esso Nuto H 32
  • Mobil DTE 24
  • Shell Tellus Oil DO 32


Bio oil

Bio oils contain ester and are a popular choice for applications such as compressor lubrication. These oils alter the properties of various materials and are therefore not suitable for lubricating pneumatic components.

Refilling oil

D series – Mini
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The lubricator can remain under pressure during refilling.
Undo the vent screw on the top of the lubricator beside the oil sight glass; the valve vents the lubricator bowl Unscrew the lubricator bowl and top up with max. 45 ml of oil

D series – Midi
The lubricator can remain under pressure during refilling.
Undo the vent screw on the top of the lubricator beside the oil sight glass; the valve vents the
lubricator bowl Unscrew the lubricator bowl and top up with max. 110 ml of oil

D series – Maxi
The lubricator can remain under pressure during refilling.
Undo the vent screw on the top of the lubricator beside the oil sight glass: the valve vents the lubricator bowl
Unscrew the lubricator bowl and top up with max. 190 ml of oil

D series – Micro
The lubricator must be pressure free during refilling
Vent the system
Unscrew the lubricator bowl and top up with max. 6.5 ml of oil

MS series – MS4
The lubricator can remain under pressure during refilling
Undo the vent screw on the top of the lubricator beside the oil sight glass; the valve vents the lubricator bowl
Unscrew the lubricator bowl: pull the blue catch on the bayonet lock downwards while simultaneously twisting the lubricator bowl
Top up the lubricator bowl with max. 30 ml of oil (36 ml if a metal bowl is used)


MS series – MS6
The lubricator can remain under pressure during refilling.
Undo the vent screw on the top of the lubricator beside the oil sight glass; the valve vents the lubricator bowl
Unscrew the lubricator bowl: pull the blue catch on the bayonet lock downwards while simultaneously twisting the lubricator bowl
Top up the lubricator bowl with max. 75 ml of oil (80 ml if a metal bowl is used)


MS series – MS12
The lubricator can remain under pressure during refilling.
Undo the vent screw on the top of the lubricator beside the oil sight glass; the valve vents the lubricator bowl
Unscrew the lubricator bowl: pull the blue catch on the bayonet lock downwards while simultaneously twisting the lubricator bowl
Top up the lubricator bowl with max. 1500 ml of oil