Specifications - Quincy Compressor QR-25 Series Instruction Manual

UNLOADER TOWERS
BEARING
ADJUSTMENT
PLATE
THREE WAY
VALVE
SHIM
TUBE FROM
AIR RECEIVER
Fig. 2-4 Control Version L
Variation
(Model 108 Start/Stop)
UNLOADER TOWERS
x 1071
Fig. 2-5 Control Version S

Specifications

Model
X2
(obsolete)
X3
(obsolete)
X8
108
206
210
216
240
270
4125
310
325
340
350
370
390
5120
W5120
*1, 2, or 4 unloader towers are employed depending upon the model of compressor.
**Maximum continuous pressure is indicated on left side, maximum intermittent high pressure on right side.
†High pressure basics required for pressures above 250 PSIG & DNV certified applications.
QR-25 Series
52201-105, May 2003
Control Version S : This version is best suited for "continuous run"
applications (whenever the compressor must start more than six [6] times
per hour). If the demand for compressed air is continuous and exceeds one
half or more of the compressor's capacity, Control Version S should be used.
Once the compressor is started, it continues to run until it is manually
turned off. Whenever there is a demand for compressed air, the pilot valve
closes, allowing the unloader in the unloader tower to actuate. At this point,
the compressor starts making compressed air. As soon as the demand for
compressed air is met, the pilot valve opens, allowing air pressure to de-
actuate in the unloader tower. The compressor continues to run but does not
Pix 1156
compress air.
Control Version LS: This version consists of a head assembly with
unloader tower(s)* a pilot valve and a hydraulic unloader. It is usually
applied to gas or diesel engine driven units. Virtually the same as Control
Version S, but with a hydraulic unloader added to protect the compressor
in the event of an oil pressure drop.
Control Version LVD: Unloader tower(s)*, a pilot valve with a manual
UNLOADER PILOT
(110832 series)
shut-off, a hydraulic unloader, a check valve assembly, and a pressure
switch make up the LVD Control Version. This version is recommended
wherever the degree of demand and usage is variable.
CONNECT TO
AIR RECEIVER
WITH A MINIMUM
The manual shutoff allows for the selection of either "start/stop" or
OF 3/8" O.D.
COPPER TUBING.
"continuous run" control. In either situation, the hydraulic unloader
Pix 1071
protects the compressor from excessive damage caused by a drop in oil
pressure.
Stroke
3
1 /
4
3
1 /
4
2
1
2 /
2
2
2
1
2 /
2
3
4
4
1
2 /
2
3
1
3 /
2
1
3 /
2
4
4
4
4
(obsolete)
Bore(s)
LP - HP
2
3
2 /
8
3
2 /
8
1
2 /
2
2
1
2 /
2
3
4
1
4 /
2
1
4 /
2
1
3 / 2
2 -
1 1
4 / 2 /
2 - 2
1
5 / 3
4 -
1
6 - 3 /
4
1
6 - 3 /
4
1
7 / 4
2 -
1
6 - 3 /
4
1
6 - 3 /
4
7 3501 Wismann Lane, Quincy IL - 62305-3116
RPM Maximum
Range PSIG**†
400-900 100/150
400-900 100
400-900 100
400-900 100/150
400-1000 100/150
400-1000 100/150
400-900 100
400-900 100
400-900 100
400-900 100
400-900 200/500
400-900 200/500
400-900 200/500
400-900 200/350
400-1070 200/250
400-950 200/250
400-1050 200/250
400-1050 200/250
Quincy Compressor