Instruction manual
17
Fuel tanks
The unit has two interconnected fuel tanks, but can also be
connected to an external fuel tank.
Control panel
The control panel is located behind a small door at the rear right-
hand side of the unit.
Data plate
The compressor is furnished with a data plate showing among
others type, serial number and nominal working pressure.
2.6 Air flow system
Air drawn through the air intake filters (AF
C
), and unloader (UA)
into LP compressor element (CE
LP
) is compressed and discharged
to the intercooler (IC) where the heat of first-stage compression is
removed by the cooling air flow.
The cooled air then enters MP compressor element (CE
MP
) where
it is further compressed and discharged through check valve (CV),
aftercooler 1 (AC
1
), aftercooler 2 (AC
2
), water separator (WS) and
air outlet valves (AOV).
During loaded operation air inlet throttle valve (TV) is open and
unloading valve (UV) closed. These valves are simultaneously
closed and opened respectively by loading solenoid valve (LSV)
through unloader piston (UP) when the working pressure reaches
its preset maximum. The pressure of the MP compressor element is
then released to the atmosphere through the unloading valve and
the blow-off silencers (BOS), resulting in closing of the check
valve. The throttle valve leaves an air passage in the closed
position. Thus air remains drawn into the compressor to maintain a
reasonable pressure ratio over the elements.
An air-operated balancing piston is fitted behind the male rotor rear
thrust bearing of MP compressor element. The piston decreases the
load on the male rotor front thrust bearing during loaded operation.
During loading the MP compressor element balancing piston is
actuated by working pressure, while during unloading the pressure
on the piston equals the atmospheric pressure.
Two intercooler relief valves (RV), an electric blow-off valve
(BOV) and a MP safety valve (SV) are comprised in the system.
Содержание PTS 916 Cd
Страница 1: ...Instruction Manual for Portable Compressors PTS 916 Cd ...
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Страница 57: ...Preliminary 57 Circuit diagrams ...
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Страница 74: ...Printed in Belgium 07 2007 Preliminary www atlascopco com ...