QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Quincy Rotary Screw
Air Compressor
QSI 200-280kW
QUINCY COMPRESSOR – USA
Q-TECH AIR SYSTEM
TECHNOLOGY LTD
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
QSI 200-280KW
Model
QSI 200
QSI 250
QSI 280
Full Load Drive Motor KW
200
250
280
7bar
37.7
46.2
50.4
8bar
37.4
45.6
50.2
10bar
34.3
36.9
-
7 & 8bar
321
321
321
10bar
321
255
-
Capacity
m³/min
Rotor
Diameter
mm
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Inlet Air System
Heavy Duty Inlet Filter
 The unique tangential inlet
flow design first uses
centrifugal separation and
throws the larger particles
against the walls of the filter
housing, hence removing them
in the first stage separation
prior to the filter element. The
remaining dust particles are
then removed via a 3 micron
filter element and the inlet air
is effectively filtered before
being compressed.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Inlet Air System
Quincy Positive Closure Inlet Valve
 Capable of modulation with capacity
range of 20 – 100 %, which is higher than
machines of similar competing lines. The
wide modulation band ensures stable
pressure in air supply, reduces energy
consumption due to varying load
changes and extends the life of the motor.
 The positive closure inlet valve is able
to close totally. During unload, air enters
the airend from the bypass valve. If there
is a sudden loss of supply power or in the
event of emergency stop, the inlet valve
completely closes and prevents a fluid
backflow. The inlet valve operates using
pressure from the reservoir and makes
operation stable and reliable.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
The Quincy Airend
Axial Flow Inlet
 The directional flow inlet
housing chambers the air flow
towards the rotor housing in
an axial direction, reducing
turbulence that would cause an
increase in temperature of inlet
air.
Drawing air into a chamber
ahead of the rotors allows the
full length of the rotor to be
used. The result is improved
efficiency by 5% to 7% over
traditional radial flow designs.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
The QUINCY Airend
Oversized Rotors
 High Efficiency,
Lower Power Consumption,
Airend Life of 100,000 hours
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
The QUINCY Airend
Oversized Bearings
 Oversized bearings last
longer.
 Discharge end triplex
tapered roller bearings for
stable operation and
increased compressor life.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
The QUINCY Airend
Airend Shaft Seal
 Triple lip PTFE shaft seal
assembly
 Outer dust seal protects
the triple lip seal and forms a
scavenge cavity.
 Scavenge cavity is linked
to the inlet valve via a return
line and the vacuum ensures
no fluid leakage.
 The scavenge line is
equipped with a check valve
that prevents any fluid from
following from the airend to
the scavenge cavity when
compressor is shut down.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Drive Train
 380V/3P/50Hz IP54（TEFC）
motor from renowned Chinese
manufacturer.
 Direct drive, no
belts/gears/coupling, hence
no transmission losses.
 Flexible dropout coupling.
Stable reliable operation.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Electronics & Controls
Main Electronic & Control
Components
 Wye-Delta reduced
voltage starters and
electronic components are
SIEMENS branded
components. Quality is
assured.
 PLC based controller
uses standard SIEMENS
industrial PLC. Reliable
and expandable for
integration with plant
network communication.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Electronics & Controls
HMI & Control Capabilities
 Uses SIEMENS TD400 HMI，dual
language display，user-friendly
interface
 Logic control of dryer
 Wye-Delta starter is standard.
 Capacity control options：
modulation auto/dual，continuous
run，network（6 machines）
 Network control mode ID assigned
 System date and time display.
Total running and loaded hours
operation display
 Continuous monitoring of
temperature and pressure
 Service timings programmed and
display
 Fault alarm display.
Preset time for motor shutdown in
auto/dual mode.
Auto-restart with programmable time
delay
 Fault alarm log with time and fault type
 Operating and alarm parameters with
password protection
 Industrial standard PLC, expandable
and supports Profibus and other
communications network.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Fluid/Air Separation System
 Uniquely designed
fluid/air separation system,
it features a one-piece twostage dual separator
integrated design with two
scavenging line systems.
Oil carryover is as low as
3ppm.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Lubrication System
 Quincy high efficiency
glass microfibre fluid filter
is designed for full flow
for total protection.
 Imported high quality
thermal control valve
ensures operating
conditions are stable and
constant.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Lubrication System
Uses Quincy QuinSyn line
of synthetic fluids
- standard factory fill
being QuinSyn- PLUS fully synthetic fluid
 Varnish free operation
 High viscosity index
 Excellent corrosion
protection
 Water holding
capability
 Efficient cooling
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Cooling System
Air Cooled as Standard
 Generously sized coolers
ensure reliable operation in
ambient temperatures as high
as 46℃.
 Aftercooler approach
temperature as low as 8℃.
 Fitted with moisture
separator as standard for
99.9% removal of bulk water.
 Water cooled option.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Cooling System
Moisture Separator
 Imported premium quality
moisture separator.
 Centrifugal moisture
separator removes 99.9% of
bulk water.
 Fitted with manual and
automatic drain valves.
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Piping System
 Air piping joints are
flange connected. Flexible
hose is suitably used
where required. Leak-free
and fuss-free
installation/dismantling.
 Oil piping uses steel
pipes, layout is neat.
Stable and reliable.
 SAE “O”-ring fittings
provide the most reliable
sealing at joints
QUINCY ROTARY SCREW AIR COMPRESSOR
QSI 200-280kW
Thank You！
QUINCY COMPRESSOR – USA
Q-TECH AIR SYSTEM
TECHNOLOGY LTD