Turbine Package Operators Manual
Chapter 1
Turbine Package System Overview
1-19
Air Distribution System
Instrument air is supplied to the package to assist in the operation and control of the gas fuel
module valves, the off-skid gas fuel block and vent valves, the lubricating oil module valves, the
P2 blow-off valves during starting and stopping, the interstage bleed valve, the combustion air
filter pulse cleaning system, the enclosure vent dampers, the auto drain system and the turbine
seals. P2 air from the turbine core is used to operate and control the P2 blow-off valves during
normal turbine operation.
The air distribution system delivers the air through a system of pipework and manifolds to the
various components.
Refer to the SIEMENS
Fluid Specification 65/0027
, which is located in this Manual Volume,
for specific information on the instrument air quality requirements.
Instrumentation
The pressure transmitter (PT185) monitors the instrument air supply pressure. The pressure
transmitter initiates high and low pressure warning and shutdown signals.
Air Distribution System Components
Instrument Air Manual Shut-Off Valve and Filter Assembly
A manual shut-off valve (HV220) and filter (XF102) assembly is located in the instrument air
supply pipework. The shut-off valve facilitates manually isolation of the system for maintenance
purposes. The filter provides filtration of the instrument air supply to remove particles above
5 microns.
Gas Fuel Module
Instrument air is supplied to the gas fuel module to provide actuation for the primary and
secondary block valves (XV7, XV6), and for the vent valve (XV212). The air is directed by the
valve solenoids (SOL5, SOL110, SOL470) to the actuators, which position the valves as required
for engine operation.
Off-Skid Gas Fuel Block and Vent Valve Assembly
Instrument air is supplied to the block valve (XV30) solenoid (SOL12) and the vent valve (XV31)
solenoid (SOL11) of the off-skid gas fuel block and vent valve. The air is directed by the
solenoids to actuators, which position the valves as required for engine operation.
Lubricating Oil Module
Instrument air is supplied to the lubricating oil module to provide control air for the lubricating oil
supply pressure control valve (PCV1) and the temperature control valve (XV428) position
indication.
