Taurus Group 60 - Manual (Page 30)

Turbomachinery Package Specification Taurus 60 Compressor Set and Mechanical Drive
9 Lubrication System
9.1 General Description
The lubrication system, (Figure 13) circulates oil under pressure to the gas turbine and
driven equipment. Lube oil is supplied from the lube oil tank located in the driver frame.
Oil temperature is maintained at optimal levels by a thermostatic control valve, oil tank
heater, and optional oil cooler.
The lubrication system incorporates the following components:
• Oil tank
• Lube oil (customer furnished)
• Gas turbine driven main lube oil pump
• AC Motor-driven pre/post lube oil pump
• DC Motor-driven backup lube oil pump
• Duplex lube oil filter system with replaceable elements
• Oil level, pressure, and temperature indications
• Pressure and temperature regulators
• Strainers
• Oil tank vent separator
• Oil tank vent flame trap
Optional features include:
• Offskid oil cooler
• Oil tank heater
• Stainless steel oil tank and tank covers
• Stainless steel filter system
9.1.1 Lube Oil
Lube oil is customer furnished. Petroleum base or synthetic oil with a viscosity grade of
C32 or C46 may be used. Synthesized hydrocarbon oils are recommended due to lower
pour point, higher viscosity index, better heat transfer, and lower oxidation rate. Lube oil
must conform to Solar’s Engineering Specification ES 9-224.
9.1.2 Gas Turbine-Driven Main Lube Oil Pump
The main lube oil pump is mounted on an integral accessory drive gearbox. This
positive-displacement pump provides lube oil pressure for normal operation.
9.1.3 AC Motor-Driven Pre/Post Lube Oil Pump
The pre/post lube oil pump provides lube oil pressure during package starting and for
post-lube cooling of the gas turbine and driven equipment bearings. The pre/post lube oil
pump provides lube oil pressure during a gas turbine roll down in the event the main lube
oil pump has failed.
9.1.4 DC Motor-Driven Backup Lube Oil Pump
The backup lube oil pump provides lube oil pressure for post lube cooling of the gas
turbine and driven equipment bearings in the event the pre/post lube oil pump fails. The
backup lube oil pump provides lube oil pressure during a gas turbine roll down in the
event the main lube oil pump and pre/post lube oil pump have both failed. The backup
lube oil pump also provides lube oil pressure during an emergency condition such as a
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