Quincy Compressor QR-25 Series, Instruction Manual

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QR-25 Series Quincy Compressor
52201-105, May 2003 7 3501 Wismann Lane, Quincy IL - 62305-3116
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
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
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.
The manual shutoff allows for the selection of either “start/stop” or
“continuous run” control. In either situation, the hydraulic unloader
protects the compressor from excessive damage caused by a drop in oil
pressure.
Specifications
Bore(s) RPM Maximum
Model Stroke LP - HP Range PSIG**†
X2
(obsolete)
1
3
/
4
2 400-900 100/150
X3
(obsolete)
1
3
/
4
2
3
/
8
400-900 100
X8 2 2
3
/
8
400-900 100
108 2
1
/
2
2
1
/
2
400-900 100/150
206 2 2 400-1000 100/150
210 2 2
1
/
2
400-1000 100/150
216 2
1
/
2
3 400-900 100
240 3 4 400-900 100
270 4 4
1
/
2
400-900 100
4125 4 4
1
/
2
400-900 100
310 2
1
/
2
3
1
/
2 -
2 400-900 200/500
325 3 4
1
/
2 -
2
1
/
2
400-900 200/500
340 3
1
/
2
5
1
/
4 -
3 400-900 200/500
350 3
1
/
2
6 - 3
1
/
4
400-900 200/350
370 4 6 - 3
1
/
4
400-1070 200/250
390 4 7
1
/
2 -
4 400-950 200/250
5120 4 6 - 3
1
/
4
400-1050 200/250
W5120
(obsolete)
4 6 - 3
1
/
4
400-1050 200/250
UNLOADER TOWERS
TUBE FROM
AIR RECEIVER
SHIM
THREE WAY
VALVE
BEARING
ADJUSTMENT
PLATE
Pix 1156
Fig. 2-4 Control Version L
Variation
(Model 108 Start/Stop)
UNLOADER TOWERS
UNLOADER PILOT
(110832 series)
x 1071
CONNECT TO
AIR RECEIVER
WITH A MINIMUM
OF 3/8" O.D.
COPPER TUBING.
Pix 1071
Fig. 2-5 Control Version S
*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.