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Dynaset Oy | Menotie 3, FI-33470 Ylöjärvi, Finland | tel: +358 3 3488 200 | info@dynaset.com | www.dynaset.com
HYDRAULIC SCREW COMPRESSORS
MAINTENANCE
Automatic transmission fluids and even engine oils can be used, provided that
they are allowed to be used in hydraulic system of your base machine.
For the hydraulic fluid change interval follow the base machine’s maintenance
instructions.
To use special hydraulic fluids with DYNASET equipment, please contact the
nearest DYNASET representative for more information.
6.3. COMPRESSOR OILS
DYNASET screw compressors must be operated with an oil that is suitable for
special requirements. Oil must be approved by the oil manufacturer for usi in screw
compressors. It must even be suitable under unfavourable operating conditions,
such as pollution of the intake air and also in case of high ambient temperatures.
Petroleum raffinates (mineral oils), synthetic oils as well as bio-degradable oils can
be used as screw compressor oils.
Compliance with oil viscosity is imperative; failure to do so poses a risk to the
bearing service life.
The oil in the HKR compressor must meet the following requirements, among
others:
• High ageing stability
• High dispersive capacity
• Flash point: above 200 °C/392 °F
• Minimum foaming
• High corrosion protection
• Basic oil: Solvent raffinate
• Operating temperature: up to 110 °C/230 °F
• Viscosity class: ISO VG 68-100
In most cases, an oil of the viscosity class ISO VG 68 is suitable, but a minimum
viscosity of 10 cSt (0.387 ft
2
/h) up to 30 cSt (1.162 ft
2
/h) at operating temperature
must be maintained. In this case, the possible reduction in the viscosity due to oil
degeneration over the duration of operation must be taken into account.
Summary of Contents for HKR 1300
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