Section 1:

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Section 1:
SUPERIOR® COMPRESSORS
COMPRESSOR FRAME
Section 1:
General Data
Compressor Frame Technical Data Book: COMPFRM-DB-2-2004
SUPERIOR® COMPRESSORS
Model Nomenclature
MH Series
The MH series compressor frames were assigned that designation to identify
the compressor as having medium (M) rod load and horsepower capabilities
and a higher (H) speed frame. The numbers following the letter designation
indicate, first, the stroke in inches and, second, the number of throws.
MH
1200 rpm
900 horsepower per throw (671 kW)
42,000 lb net rod load (187 kN)
47,000 lb internal gas rod load
MH62
6.0-inch stroke (15.2 cm)
2-throw
MH64
6.0-inch stroke (15.2 cm)
4-throw
MH66
6.0-inch stroke (15.2 cm)
6-throw
WH Series
The WH series compressor frame designation identifies the compressor as
a heavy weight (W) rod load and horsepower frame designed for a higher
(H) speed. The numbers following the letter designation are similar for all
Superior frames. The first number indicates the stroke and the second, the
number of throws.
WH
1200 rpm
900 horsepower per throw (671 kW)
55,000 lb net rod load (245 kN)
65,000 lb internal gas rod load
WH62
6.0-inch stroke (15.2 cm)
2-throw
WH64
6.0-inch stroke (15.2 cm)
4-throw
WH66
6.0-inch stroke (15.2 cm)
6-throw
Cooper Compression
1-3
Section 1: General Data
W7 Series
The W7 series compressor frame was the first heavy weight (W) compressor
frame carrying high rod loads and horsepower. The “7” indicates the stroke
in inches. The number following the “7” indicates the number of throws.
W7
1000 rpm
1000 horsepower per throw (746 kW)
60,000 lb net rod load (267 kN)
W72
7.0-inch stroke (17.8 cm)
2 throw
W74
7.0-inch stroke (17.8 cm)
4 throw
W76
7.0-inch stroke (17.8 cm)
6 throw
WG Series
The WG series compressor is to replace the W7 series. The WG has a higher
rod load and a stiffer base and is available with either a 6" or a 7" stroke. The
first number following "WG" indicates the stroke in inches and the second
number indicates the number of throws.
1-4
WG7
1000 rpm
1250 horsepower per throw (932 kW)
70,000 lb net rod load (312 kN)
75,000 lb internal gas rod load
WG72
7.0-inch stroke (17.8 cm)
2-throw
WG74
7.0-inch stroke (17.8 cm)
4-throw
WG76
7.0-inch stroke (17.8 cm)
6-throw
WG6
1200 rpm
1500 horsepower per throw (1119 kW)
70,000 lb net rod load (312 kN)
75,000 lb internal gas rod load
WG62
6.0-inch stroke (15.2 cm)
2-throw
WG64
6.0-inch stroke (15.2 cm)
4-throw
WG66
6.0-inch stroke (15.2 cm)
6-throw
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Operating Specifications - MH Frame
English
MH62
MH64
MH66
Number of throws
2
4
6
Stroke (inches)
6
6
6
Frame horsepower (bhp)
1800
3600
5400
Power per throw, rated @ 1200 rpm (bhp)
900
900
900
Max hp any one throw (bhp)
900
900
900
Max piston speed (fpm)
1200
1200
1200
Speed range (rpm) **
600-1200
600-1200
600-1200
External rod load (lbs) *
38,000
38,000
38,000
Internal rod load (lbs) *
47,000
47,000
47,000
Net rod load (lbs) *
42,000
42,000
42,000
Sump capacity (gal)
20
50
80
Lube oil pump capacity to
main bearings (gmp)
16
32
48
MH62
MH64
MH66
Number of throws
2
4
6
Stroke (mm)
152.4
152.4
152.4
Frame horsepower (kW)
1342
2685
4027
Power per throw rated @ 1200 rpm (kW)
671
671
671
Max hp any one throw (kW)
671
671
671
Max piston speed (m/sec)
6.10
6.10
6.10
Speed range (rpm) **
600-1200
600-1200
600-1200
External rod load (kg) *
17,237
17,237
17,237
Internal rod load (kg) *
21,319
21,319
21,319
Net rod load (kg) *
19,051
19,051
19,051
Sump capacity (l)
75.7
189.3
302.8
Lube oil pump capacity to
main bearings (l/sec)
1.01
2.02
3.03
Metric
* See Rod Load Definitions, page 1-10
** Motor-driven frames have a minimum speed of 585 rpm.
Cooper Compression
1-5
Section 1: General Data
Operating Specifications - WH Frame
English
WH62
WH64
WH66
Number of throws
2
4
6
Stroke (inches)
6
6
6
Frame horsepower (bhp)
1800
3600
5400
Power per throw, rated @ 1200 rpm (bhp)
900
900
900
Max hp any one throw (bhp)
1250
1250
1250
Max piston speed (fpm)
1200
1200
1200
Speed range (rpm) **
600-1200
600-1200
600-1200
External rod load (lbs) *
50,000
50,000
50,000
Internal rod load (lbs) *
65,000
65,000
65,000
Net rod load (lbs) *
55,000
55,000
55,000
Sump capacity (gal)
20
50
80
Lube oil pump capacity to
main bearings (gmp)
16
32
48
WH62
WH64
WH66
Number of throws
2
4
6
Stroke (mm)
152.4
152.4
152.4
Frame horsepower (kW)
1342
2685
4027
Power per throw rated @ 1200 rpm (kW)
671
671
671
Max hp any one throw (kW)
932
932
932
Max piston speed (m/sec)
6.10
6.10
6.10
Speed range (rpm) **
600-1200
600-1200
600-1200
External rod load (kg) *
22,680
22,680
22,680
Internal rod load (kg) *
29,484
29,484
29,484
Net rod load (kg) *
24,948
24,948
24,948
Sump capacity (l)
75.7
189.3
302.8
Lube oil pump capacity to
main bearings (l/sec)
1.01
2.02
3.03
Metric
* See Rod Load Definitions, page 1-10
** Motor-driven frames have a minimum speed of 585 rpm.
1-6
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Operating Specifications - W7 Frame
English
W72
W74
W76
Number of throws
2
4
6
Stroke (inches)
7
7
7
Frame horsepower (bhp) **
2500
4000
6000
Power per throw rated @ 1000 rpm (bhp)
1,250
918
833
Max hp any one throw (bhp)
1400
1400
1400
Max piston speed (fpm)
1167
1167
1167
Speed range (rpm)
600-1000
600-1000
600-1000
External rod load (lbs) *
55,000
55,000
55,000
Internal rod load (lbs) *
65,000
65,000
65,000
Net rod load (lbs) *
60,000
60,000
60,000
Sump capacity (gal)
30
80
160
Lube oil pump capacity
to main bearings (gpm)
18
35
53
W72
W74
W76
Number of throws
2
4
6
Stroke (mm)
177.8
177.8
177.8
Frame horsepower (kW) **
1,864
2,983
4,474
Power per throw, rated @ 1000 rpm (kW)
932
685
621
Max hp any one throw (kW)
1,044
1,044
1,044
Max piston speed (m/sec)
5.93
5.93
5.93
Speed range (rpm)
600-1000
600-1000
600-1000
External rod load (kg) *
24,948
24,948
24,948
Internal rod load (kg) *
29,484
29,484
29,484
Net rod load (kg) *
27,216
27,216
27,216
Sump capacity (l)
114
303
606
Lube oil pump capacity
to main bearings (l/sec)
1.14
2.21
3.34
Metric
* See Rod Load Definitions, page 1-10
** Consult Superior Marketing for frame horsepower ratings when
compressing gas with a specific gravity above 1.0 and/or applications
with unusual unloading requirements.
Cooper Compression
1-7
Section 1: General Data
Operating Specifications - WG7 Frame
English
WG72
WG74
WG76
Number of throws
2
4
6
Stroke (inches)
7
7
7
Frame horsepower (bhp) **
2500
5000
7500
Power per throw rated @ 1000 rpm (bhp)
1250
1250
1250
Max hp any one throw (bhp)
1475
1475
1475
Max piston speed (fpm)
1167
1167
1167
Speed range (rpm) ***
600-1000
600-1000
600-1000
External rod load (lbs) *
65,000
65,000
65,000
Internal rod load (lbs) *
75,000
75,000
75,000
Net rod load (lbs) *
70,000
70,000
70,000
Sump capacity (gal)
35
70
105
Lube oil pump capacity
to main bearings (gpm)
18
35
53
WG72
WG74
WG76
Number of throws
2
4
6
Stroke (mm)
177.8
177.8
177.8
Frame horsepower (kW) **
1865
3730
5595
Power per throw, rated @ 1000 rpm (kW)
933
933
933
Max hp any one throw (kW)
1100
1100
1100
Max piston speed (m/sec)
5.93
5.93
5.93
Speed range (rpm) ***
600-1000
600-1000
600-1000
External rod load (kg) *
29,484
29,484
29,484
Internal rod load (kg) *
34,020
34,020
34,020
Net rod load (kg) *
31,752
31,752
31,752
Sump capacity (l)
132
265
397
Lube oil pump capacity
to main bearings (l/sec)
1.14
2.21
3.34
Metric
* See Rod Load Definitions, page 1-10
** Consult Superior Marketing for frame horsepower ratings when
compressing gas with a specific gravity above 1.0 and/or applications
with unusual unloading requirements.
*** Motor-driven frames have a minimum speed of 585 rpm.
1-8
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Operating Specifications - WG6 Frame
English
WG62
WG64
WG66
Number of throws
2
4
6
Stroke (inches)
6
6
6
Frame horsepower (bhp) **
3000
6000
9000
Power per throw rated @ 1200 rpm (bhp)
1500
1500
1500
Max hp any one throw (bhp)
1770
1770
1770
Max piston speed (fpm)
1200
1200
1200
Speed range (rpm) ***
700-1200
700-1200
700-1200
External rod load (lbs) *
65,000
65,000
65,000
Internal rod load (lbs) *
75,000
75,000
75,000
Net rod load (lbs) *
70,000
70,000
70,000
Sump capacity (gal)
35
70
105
Lube oil pump capacity
to main bearings (gpm)
18
35
53
WG62
WG64
WG66
Number of throws
2
4
6
Stroke (mm)
152.4
152.4
152.4
Frame horsepower (kW) **
2238
4476
6714
Power per throw, rated @ 1200 rpm (kW)
1119
1119
1119
Max hp any one throw (kW)
1320
1320
1320
Max piston speed (m/sec)
6.1
6.1
6.1
Speed range (rpm) ***
700-1200
700-1200
700-1200
External rod load (kg) *
29,484
29,484
29,484
Internal rod load (kg) *
34,020
34,020
34,020
Net rod load (kg) *
31,752
31,752
31,752
Sump capacity (l)
132
265
397
Lube oil pump capacity
to main bearings (l/sec)
1.14
2.21
3.34…
Metric
* See Rod Load Definitions, page 1-10
** Consult Superior Marketing for frame horsepower ratings when
compressing gas with a specific gravity above 1.0 and/or applications
with unusual unloading requirements.
*** Motor-driven frames have a minimum speed of 585 rpm.
Cooper Compression
1-9
Section 1: General Data
Rod Load Definitions
External Rod Load
The external rod load of a reciprocating compressor is a calculation
considering the unit in a static state. The calculation for deriving the ERL is:
ERL = PD(HA) - PS(CA) where:
PD = Discharge Pressure (psia) at the cylinder flange
PS = Suction Pressure (psia) at the cylinder flange
HA = Head end surface area of the piston
CA = Crank end surface area of the piston
Internal Gas Rod Load
The internal rod load is often referred to as the internal gas rod load
of a reciprocating compressor and the terms are synonymous. The IRL
is a dynamic rod load calculation based upon the internal gas pressures
within the cylinder bore. These gas pressures take into account the dynamic
pressure drop characteristics found across the valves and the gas passages.
The IRL is calculated through the 360 degree rotation of the crankshaft with
the highest values being used.
Net Rod Load
The net rod load is considered a dynamic rod load rating. The NRL is
the sum of the IRL calculation and the inertial loads of the reciprocating
weights. The NRL is calculated through the full 360-degree rotation of the
crankshaft with the highest values being used.
1-10
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Lubrication
MH and WH Frames
The complete lubrication system of the compressor consists of two parts
which are of equal importance:
• The system that provides lubrication to the frame running parts;
• The system that provides lubrication for the cylinders.
Both systems use oil from the frame sump. Refer to Engineering Standard
1002 (page 4-44) for lube oil specifications. These Standards deal with frame
lubrication; refer to the cylinder data book for information about cylinder
lubrication.
A gear-driven lubricating oil pump is flange-mounted to the frame with
a pressure relief valve included for cold start protection. A shell-and-tube
oil cooler, shipped separately for remote mounting, is provided. The cooler
is constructed of copper or admiralty tubing with threaded oil and water
connections. Other features include a low oil pressure shutdown switch and
an oil level sight glass. All the necessary piping is supplied and mounted.
Oil pressure should be 45 – 55 psi and is maintained at this level by
the pressure relief valve. If adjustment is required, this can be done by
removing the cap which gives access to the spring-loaded adjusting screw.
This adjustment should be made at normal operating speed and temperature.
WG and W7 Frames
The complete lubrication system of the compressor may be conveniently
divided into three parts which are of equal importance:
• Lube oil from the frame sump provides complete protection of all
frame running parts.
• A separate, independent, force-feed lubricator and tubing system
provides lubrication for cylinder walls and piston rod packing.
• A shell-and-tube cooler is provided for frame oil cooling.
The frame lubrication system consists of a gear-driven pump, pressure relief
valve, oil cooler, and oil filter. Oil pressure should be 35 – 40 psi for W7
frames and 45 - 55 psi for WG frames and is maintained at this level by
the pressure relief valve. If adjustment is required, this can be done by
removing the cap which gives access to the spring-loaded adjusting screw.
This adjustment should be made at normal operating speed and temperature.
Cooper Compression
1-11
Section 1: General Data
Frame Lubricant and Lubrication Suggestions
Provided that the compressor’s crankcase is sealed off from the cylinders,
a good mineral oil which provides resistance to oxidation and corrosion is
generally satisfactory to use. However, there is no objection to the use of a
detergent type of oil if it is more readily available. To assure oil suitability,
use a product of well known merit produced by a responsible concern and in
accordance with the manufacturer’s recommendations.
In some cases it may be convenient or practical to use the same type
of oil in the compressor as is used in the compressor drive engine. This
is permissible as long as the engine oil is of proper viscosity. Superior
recommends SAE 40 for all normal compressor operation and SAE 30 when
ambient temperatures are below freezing. Refer to Engineering Standard
1002 (page 4-44) for further information.
If start-ups are to take place when the ambient temperature is below freezing,
the pour point of the oil must be low enough to insure flow to the oil pump.
Heavier oil should be heated before starting.
If a compounded oil is used, the non-corrosiveness of this oil must be looked
into very carefully. The oil must not contain substances which might be
injurious to tin- or lead-base babbitts. It is also highly desirable that it be
noncorrosive to copper-lead alloys.
The oil level in the frame sump should be checked while the compressor is
running. The correct level is shown by the sight gauge on the auxiliary end
of the compressor. Oil level (while running) should be no higher than the
top and no lower than the bottom of the sight gauge. Oil is added through
the breather cap hole in the top cover. The breather cap is designed to be
threaded into its bushing by hand and no wrenches are to be used. Makeup
oil may also be continuously added through an optional, frame-mounted oil
level controller connected to an oil supply tank. (Note: the regulator is not
designed to make up large quantities of oil in a short time period, such as
refilling the crankcase after oil or filter changes, but simply to compensate
for small oil losses which normally occur during operation.)
Oil change periods, in general, may be longer than the period required for
compressor drive engines. An initial break-in period of 300 to 500 hours is
recommended. Thereafter, the oil and filter element change interval can be
increased to 2000 hours or longer, provided that the filter element remains in
good shape and the oil remains reasonably clean. Experience will determine
when to change the filter element and the oil.
i
(See the lubrication
logic diagrams in
the individual frame
model sections of this
data book.)
1-12
In the case of the W7 frame, when a new element is installed in the
filter a sufficient amount of lubricating oil must be added into the filter
to compensate for that which has been drained from it. After a new filter
element is installed, add oil to the top of the filter canister. Replace the lid
and vent the line. The vent connection is a special orifice fitting. Do not use
a standard fitting at this location.
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Lubrication Specs
MH Frame - English
MH62
MH64
MH66
Lube Oil Sump Capacity (gals)
20
50
80
Lube Oil Pump Capacity to
Main Bearings (gal/min)
16
32
48
Coolant Flow for Heat Exchanger (gal/min)
15
30
60
Heat Loads @ 1200 rpm (Btu/hr)
42,000
51,000
96,000
Coolant Temperature In
160° F
160° F
160° F
Coolant Temperature Out
166° F
166° F
166° F
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°F above T out)
25°
25°
25°
Oil (°F out)
190°
190°
190°
MH62
MH64
MH66
Lube Oil Sump Capacity (liters)
76
189
303
Lube Oil Pump Capacity to
Main Bearings (l/min)
61
121
182
Coolant Flow for Heat Exchanger (l/min)
57
114
227
Heat Loads @ 1200 rpm (kJ/hr)
44,314
53,810
101,290
Coolant Temperature In (°C)
71°
71°
71°
Coolant Temperature Out (°C)
74°
74°
74°
MH Frame - Metric
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°C above T out)
14°
14°
14°
Oil (°C out)
88°
88°
88°n
Coolant is 50%/ 50% mix of H20 and ethylene glycol
Cooper Compression
1-13
Section 1: General Data
WH Frame - English
WH62
WH64
WH66
Lube Oil Sump Capacity (gals)
20
50
80
Lube Oil Pump Capacity to
Main Bearings (gal/min)
16
32
48
Coolant Flow for Heat Exchanger (gal/min)
15
30
60
Heat Loads @ 1200 rpm (Btu/hr)
42,000
51,000
96,000
Coolant Temperature In
160° F
160° F
160° F
Coolant Temperature Out
166° F
166° F
166° F
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°F above T out)
25°
25°
25°
Oil (°F out)
190°
190°
190°
WH62
WH64
WH66
Lube Oil Sump Capacity (liters)
76
189
303
Lube Oil Pump Capacity to
Main Bearings (l/min)
61
121
182
Coolant Flow for Heat Exchanger (l/min)
57
114
227
Heat Loads @ 1200 rpm (kJ/hr)
44,314
53,810
101,290
Coolant Temperature In (°C)
71°
71°
71°
Coolant Temperature Out (°C)
74°
74°
74°
WH Frame - Metric
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°C above T out)
14°
14°
14°
Oil (°C out)
88°
88°
88°n
Coolant is 50%/ 50% mix of H20 and ethylene glycol
1-14
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
W7 Frame - English
W72
W74
W76
Lube Oil Sump Capacity (gals)
30
80
160
Lube Oil Pump Capacity to
Main Bearings (gal/min)
18
35
53
Coolant Flow for Heat Exchanger (gal/min)
40
60
60
Heat Loads @ 1200 rpm (Btu/hr)
37,500
75,000
112,500
Coolant Temperature In
160° F
160° F
160° F
Coolant Temperature Out
166° F
166° F
166° F
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°F above T out)
25°
25°
25°
Oil (°F out)
190°
190°
190°
W72
W74
W76
Lube Oil Sump Capacity (liters)
114
303
606
Lube Oil Pump Capacity to
Main Bearings (l/min)
68
132
201
Coolant Flow for Heat Exchanger (l/min)
151
227
227
Heat Loads @ 1200 rpm (kJ/hr)
39,566
79,133
118,699
Coolant Temperature In (°C)
71°
71°
71°
Coolant Temperature Out (°C)
74°
74°
74°
W7 Frame - Metric
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°C above T out)
14°
14°
14°
Oil (°C out)
88°
88°
88°n
Coolant is 50%/ 50% mix of H20 and ethylene glycol
Cooper Compression
1-15
Section 1: General Data
WG7 Frame - English
WG72
WG74
WG76
Lube Oil Sump Capacity (gals)
35
70
105
Lube Oil Pump Capacity to
Main Bearings (gal/min)
18
35
53
Coolant Flow for Heat Exchanger (gal/min)
40
60
60
Heat Loads @ 1200 rpm (Btu/hr)
36,000
72,000
108,000
Coolant Temperature In
155° F
155° F
155° F
Coolant Temperature Out
162° F
162° F
162° F
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°F above T out)
25°
25°
25°
Oil (°F out)
190°
190°
190°
WG72
WG74
WG76
Lube Oil Sump Capacity (liters)
132
265
397
Lube Oil Pump Capacity to
Main Bearings (l/min)
1.14
2.21
3.34
Coolant Flow for Heat Exchanger (l/min)
151.4
227.1
227.1
Heat Loads @ 1200 rpm (kJ/hr)
39,980
79,961
113,941
Coolant Temperature In (°C)
68°
68°
68°
Coolant Temperature Out (°C)
72°
72°
72°
WG7 Frame - Metric
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°C above T out)
14°
14°
14°
Oil (°C out)
88°
88°
88°n
Coolant is 50%/ 50% mix of H20 and ethylene glycol
1-16
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
WG6 Frame - English
WG62
WG64
WG66
Lube Oil Sump Capacity (gals)
35
70
105
Lube Oil Pump Capacity to
Main Bearings (gal/min)
18
35
53
Coolant Flow for Heat Exchanger (gal/min)
40
60
60
Heat Loads @ 1200 rpm (Btu/hr)
51,840
103,680
155,520
Coolant Temperature In
155° F
155° F
155° F
Coolant Temperature Out
165° F
165° F
165° F
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°F above T out)
25°
25°
25°
Oil (°F out)
190°
190°
190°
WG62
WG64
WG66
Lube Oil Sump Capacity (liters)
132
265
397
Lube Oil Pump Capacity to
Main Bearings (l/min)
1.14
2.21
3.34
Coolant Flow for Heat Exchanger (l/min)
151.4
227.1
227.1
Heat Loads @ 1200 rpm (kJ/hr)
54,691
109,382
164,074
Coolant Temperature In (°C)
68°
68°
68°
Coolant Temperature Out (°C)
74°
74°
74°
WG6 Frame - Metric
Recommended Shutdown Temperature Settings for Lube System:
Coolant (°C above T out)
14°
14°
14°
Oil (°C out)
88°
88°
88°n
Coolant is 50%/ 50% mix of H20 and ethylene glycol
Cooper Compression
1-17
Section 1: General Data
Component Features
Base (Crankcase)
The base is made of high strength alloy iron and is heavily ribbed and
reinforced for maximum rigidity. Large spacer bars provide further stability
and easy reassembly. The top and end covers are individually removable
to provide easy access to moving parts. Our open-top design allows the
crankshaft to be easily removed. An oil sump is provided in the lower
portion of the base. The line-bored main bearing supports have matchmarked and numbered caps, which must be assembled accordingly.
Crankshaft, Thrust and Main Bearings
The complete crankshaft assembly includes the drive end oil slinger and
the auxiliary end drive gear. Both of these are shrunk onto the crankshaft,
eliminating the need for keyways and keys. The crankshaft is drilled to carry
lubrication from the main bearings to the connecting rod bearings.
The thrust bearing is a “half washer” type. It fits into a groove machined
in the main bearing saddle and is held captive by the crankshaft, the main
bearing saddle, and the main bearing cap. Plain and thrust main bearing
shells are of the split, non-adjustable, precision type and are located via tang
slots. The lower half can be rolled out with the tool provided when the tool
kit is ordered (see the special tool list, page 3-15).
The upper and lower main bearing shells are interchangeable. However, once
the compressor has been run it is preferable that the shells be kept in their
original positions. Therefore, upon removal of the bearing shells, they should
be so marked.
Connecting Rod and Bearings
The connecting rod is a steel forging, rifle-drilled to provide lubrication to
the crosshead pin bushings. The crankpin end of the rod is split and retains
the precision-type bearing shells by means of four alloy steel bolts clamping
the cap and rod together. The cap is aligned to the rod by dowels and both
parts are precision machined as an assembly. A complete assembly must be
ordered if replacement is necessary.
1-18
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Crosshead Guide
Removable, heavily ribbed iron castings with integral distance piece.
Auxilliary distance piece available as an option for corrosive gas service.
Large covers on both sides for easy inspection and access to the crosshead,
connecting rod, and rod packing. The crosshead can be removed through
these openings without disturbing the cylinder mounting. The fasteners
holding the crosshead guide to the base must be torqued uniformly (using a
crisscross pattern) to prevent cocking of the guide relative to the base and
crankshaft. (See Recommended Bolt Torque Values tables, pages 3-7 through
3-10, for torque values).
Lubrication to the crosshead slide areas is handled differently by the WH6/
W7/WG and the MH6 frames. On the WH6/W7/WG, lube oil is sent entirely
via internal oil passages. On the MH6 it is directed internally through the
frame and then tubed externally at the crosshead guide and the bearing.
Crosshead
The crosshead is made of ductile iron and has removable top and bottom
shoes which have durable bearing material on the sliding surface. Screws
and locknuts hold the shoes firmly in place. These must be torqued
uniformly to the figure specified in the Recommended Torque Values tables
(pages 3-7 through 3-10).
Auxiliary End Cover
The auxiliary end cover is aligned to the base and located by a dowel.
Additional dowels in the auxiliary end cover provide proper location for
attaching the lube oil pump drive carrier and the force feed lubricator drive
carrier.
Both the lube oil pump and force feed lubricator carrier assemblies are
fitted with precision bushings which may be replaced without disturbing gear
alignment or backlash.
Drive End Cover
The old drive end cover, which is found in a few of the early units, is aligned
with the base by two dowel pins. An additional dowel pin is used in the
end cover to locate the seal cover. The seal cover has a close pilot fit in
the end cover.
Most of the frames have the new one-piece drive end cover, which is aligned
to the frame via two dowels.
Cooper Compression
1-19
Section 1: General Data
Mechanical Construction of Main
Components
Frame
One piece, cast iron, heavily ribbed casting with tie bolt construction.
Aluminum top cover and cast iron or steel end covers.
Crankshaft
MH6, WH6: forged from a solid billet of heat-treated SAE 4140 steel,
fully machined and balanced. Main bearing journals are 7 inches (178 mm)
diameter. Centerline from bottom of frame is 20 inches (508 mm).
W7, WG: forged from a solid billet of heat-treated SAE 5046 or 4140 steel,
fully machined and balanced. Main bearing journals are 8 inches (203 mm)
diameter. Centerline from bottom of frame is 22 inches (558.8 mm).
Bearings
Precision, split shell, steel backed tri-metal main and connecting rod
bearings. Held in place by 4-bolt, ductile iron bearing caps. Main, thrust, and
connecting rod are 7 inches (178 mm) diameter on the MH6 and WH6. On
the W7 and WG, main and rod are 8 inches (203 mm) diameter and thrust
are 8.5 inches (216 mm) diameter.
Connecting Rod
MH6, WG: closed die forged SAE 4140 steel, heat-treated, precision
machined, H-section, rifle drilled for pin lubrication.
WH6, W7: closed die forged SAE 1045 steel, heat-treated, precision
machined, H-section, rifle drilled for pin lubrication.
Crosshead
MH6: ductile iron, 10.5 inches (267 mm) diameter, with replaceable trimetal shoes 6.375 inches wide x 9.5 inches long (162 x 241 mm).
WH6: ductile iron, 12.75 inches (324 mm) diameter, with replaceable trimetal shoes 7 inches wide x 12 inches long (178 x 305 mm).
W7, WG: ductile iron, 13.75 inches (349 mm) diameter, with replaceable
trimetal shoes 9 inches wide x 12 inches long (229 x 305 mm).
Crosshead Pin
MH6: alloy steel 4.0 inches (102 mm) diameter.
WH6: alloy steel 4.75 inches (121 mm) diameter.
W7, WG: alloy steel 4.625 inches (117.5 mm) diameter.
1-20
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Component Interchangeability
Part Description
MH6
WH6
W7
WG
Frame:
Crankshaft Coupling Hub
Drive End Cover
Auxilliary End Cover
Compressor Base & Bearing Caps Assembly
Spacer Bar - Compressor Base
Main Bearing Shells (Upper & Lower)
Compressor Top Cover
Breather
Crankshaft
Crankshaft Oil Thrower Hub
Oil Pump & Lubricator Drive Gear Assembly
Crankshaft Oil Seal
Connecting Rod Bearing Shells (Upper & Lower)
Crosshead Guide Support Foot
Lube Oil System:
Lube Oil Cooler
Hand Priming Pump - Lube Oil
Oil Level Sight Gauge
Lube Oil Pump Assembly
Oil Bypass Valve Assembly
Oil Filter
Force Feed Lubricator System:
Lubricator Flexible Coupling
Oil force feed lubricator
Regulating valve
signifies the part is interchangeable between the compressor frames
indicated.
signifies the part is interchangeable between W7 and WG frames.
Cooper Compression
1-21
Section 1: General Data
Couplings
MH62 & WH62 Frames with 1200 RPM Engines
Engine
BHP
RPM
Coup1ing
Size
Coupling .
Part No.
Compressor
Hub Part No.
Dimensions (inches) see Fig. 1
“A”
“B”
“C”
“D”
“E” **
1706G2
500
1200
700
N/A
B-930-738
-
26.08
20.9
26.83
22.5 SAE
1712G
800
1200
700
YC-902-059
B-930-738
-
26.69
21.5
27.52
26.5 SAE
1712G*
800
1200
700
YC-902-059
B-930-738
-
26.69
21.5
22.32
26.5 SAE
1200
1200
700
YC-902-059
B-930-738
-
26.69
21.51
42.24
26.5 SAE
1600
1200
700
YC-902-059
B-930-738
-
26.69
21.51
42.24
26.5 SAE
2406G
2406GTL
2408G
2408GTL
MH64 & WH64 Frames with 1200 RPM Engines
Engine
BHP
RPM
Coup1ing
Size
Coupling .
Part No.
Compressor
Hub Part No.
Dimensions (inches) see Fig. 1
“A”
“B”
“C”
“D”
“E” **
1706G2
500
1200
700
N/A
B-930-738
-
26.08
20.9
26.83
22.5 SAE
1712G
800
1200
700
YC-902-059
B-930-738
-
26.69
21.5
27.52
26.5 SAE
1712G*
800
1200
700
YC-902-059
B-930-738
-
26.69
21.5
22.32
26.5 SAE
1200
1200
700
YC-902-059
B-930-738
-
26.69
21.51
42.24
26.5 SAE
1600
1200
700
YC-902-059
B-930-738
-
26.69
21.51
42.24
26.5 SAE
2400
1200
750
YB-930-314
B-925-527
-
27.84
22.65
50.40
26.5 HD
3200
1200
750
YB-930-314
B-925-527
-
27.84
22.65
34.65
26.5 HD
2406G
2406GTL
2408G
2408GTL
2412G
2412GTL
2416G
2416GTL
*Engine with optional mounting feet
** SAE = Light duty bolting, HD = Heavy duty bolting
1-22
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Couplings, continued
MH66 & WH66 Frames with 1200 RPM Engines
Engine
BHP
RPM
Coup1ing
Size
Coupling .
Part No.
Compressor
Hub Part No.
Dimensions (inches) see Fig. 1
“A”
“B”
“C”
“D”
“E” **
1706G2
500
1200
700
N/A
B-930-738
-
26.08
20.9
26.83
22.5 SAE
1712G
800
1200
700
YC-902-059
B-930-738
-
26.69
21.5
27.52
26.5 SAE
1712G*
800
1200
700
YC-902-059
B-930-738
-
26.69
21.5
22.32
26.5 SAE
2406G/GTL 1200
1200
700
YC-902-059
B-930-738
-
26.69
21.51
42.24
26.5 SAE
2408G/GTL 1600
1200
700
YC-902-059
B-930-738
-
26.69
21.51
42.24
26.5 SAE
2412G/GTL 2400
1200
700
YB-930-775
B-930-738
-
26.69
21.51
49.25
26.5 HD
2416G/GTL 3200
1200
750
YB-930-314
B-925-527
-
27.84
22.65
34.65
26.5 HD>
*Engine with optional mounting feet
** SAE = Light duty bolting, HD = Heavy duty bolting
Figure 1-1 Coupling Arrangement for 1200 RPM Engines/MH, WH Frames
ICAUTION
Some applications may
require a different coupling selection from the
one shown. Superior
Analytical Department
should be
contacted to confirm
final coupling selection
on all projects.
Cooper Compression
1-23
Section 1: General Data
Couplings, continued
MH62 & WH62 Frames with 900 RPM Engines
Engine
BHP
RPM
Coupling
Size
Coupling .
Part No.
Compressor
Hub Part No.
Dimensions (inches) see Fig. 2
“A”
“B”
“C”
6GTL, B, C
825
900
700
YC-901-179
B-930-738
21.51
26.69
31.26
38.19 20.375 HD
8GTL, B, C, 1100
900
700
YC-901-179
B-930-738
21.51
26.699
30.13
7.077 20.375 HD
8SGT, B, C
1350
900
700
YB-930-775
B-930-738
21.51
26.69
35.88
43.57
26.5 HD
12G825
1200
900
700
YB-930-775
B-930-738
21.51
26.69
37.38
45.07
26.5 MD
“D”
“E” *
“D”
“E” *
MH64 & WH64 Frames with 900 RPM Engines
Engine
BHP
RPM Coupling
Size
Coupling
Part No.
Compressor
Hub Part No.
Dimensions (inches) see Fig. 2
“A”
“B”
“C”
6GTL, B, C
825
900
700
YC-901-179
B-930-738
21.51
26.69
31.26
38.19 20.375 MD
8GTL, B, C, E
100
900
700
YC-901-179
B-930-738
21.51
6.699
30.13
7.077 20.375 HD
8SGT, B, C
1350
900
700
YB-930-775
B-930-738
21.51
26.69
35.88
43.57
26.5 HD
12G825
1200
900
700
YB-930-775
B-930-738
21.51
26.69
37.38
45.07
26.5 RD
12GTL, B, C
1650
900
700
YB-930-775
B-930-738
21.51
26.69
37.38
45.07
26.5 RD
12SGT, B, C
2000
900
750
YB-930-314
B-925-527
22.65
27.84
38.53
46.22
26.5 HD
16G825
1600
900
700
YB-930-775
B-930-738
21.51
26.69
37.38
45.07
26.5 HD
16GTL, B, C
2200
900
750
YB-930-314
B-925-527
22.65
27.84
38.53
46.22
26.5 HD
16SGT, B, C
2650
900
800
YB-930-315
B-925-509
24.4
29.59
40.28
47.97
26.5 RD
* SAE = Light duty bolting, HD = Heavy duty bolting
1-24
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Couplings, continued
MH66 & WH66 Frames with 900 RPM Engines
Engine
BHP
RPM
Coup1ing
Size
Coupling .
Part No.
Compressor
Hub Part No.
Dimensions (inches) see Fig. 2
“A”
“B”
“C”
6GTL, 5, 0
825
900
700
YC-901-179
B-930-738
21.51
26.69
31.26
38.19 20.375 MD
8GTL, B, 0,
E100
900
700
YC-901-179
B-930-738
21.51
6.699
30.13
7.077 20.375 RD
8SGT, B, C
1350
900
700
YB-930-775
B-930-738
21.51
26.69
35.88
43.57
26.5 RD
12G825
“D”
“E” *
1200
900
700
YB-930-775
B-930-738
21.51
26.69
37.38
45.07
26.5 MD
12GTL, E, 0 1650
900
700
YB-930-775
B-930-738
21.51
26.69
37.38
45.07
26.5 HD
12SGT, E, 0
2000
900
750
YB-930-314
B-925-527
22.65
27.84
38.53
46.22
26.5 HD
16G825
1600
900
700
YB-930-775
3-930-738
21.51
26.69
37.38
45.07
26.5 MD
Í6GTL, B, 0
2200
900
750
YB-930-314
5-925-527
22.65
27.84
38.53
46.22
26.5 RD
16SGT, B, C 2650
900
800
YB-930-315
B-925-509
24.4
29.59
40.28
47.97
26.5 HD
* SAE = Light duty bolting, HD = Heavy duty bolting
Figure 1-2 Coupling Arrangement for 900 RPM Engines/All Frames
ICAUTION
Some applications may
require a different coupling selection from the
one shown. Superior
Analytical Department
should be
contacted to confirm
final coupling selection
on all projects.
Cooper Compression
1-25
Section 1: General Data
Couplings, continued
W7 & WG Frames with 900 RPM Engines
Engine
BHP
RPM Coupling
Size
Coupling .
Part No.
Compressor
Hub Part No.
Dimensions (inches) see Fig. 2
“A”
“B”
“C”
YC-901-179
YC-901-676
26.95
29.589
35.58
39.957 20.375 HD
“D”
“E” *
*8GTL B, C, E 1100
900
700
8SGT, B, C
1350
900
700
YE-930-775
YC-901-676
26.95
29.58
41.33
46.45
26.5 HD
120825
1200
900
700
YB-930-775
YC-901-676
26.95
29.58
42.83
47.95
26.5 HD
12GTL, B, C
1650
900
700
YB-930-775
YC-901-676
26.95
29.58
42.83
47.95
26.5 HD
12SGT, B, C
2000
900
750
YB-930-314
B-939-776
28.14
30.77
44.02
49.14
26.5 HD
16G825
1600
900
700
YE-930-775
YC-901-676
26.95
29.58
42.83
47.95
26.5 HD
16GTL, B, C
2200
900
750
YB-930-314
3-939-776
28.14
30.77
44.02
49.14
26.5 HD
16SGT, B, C
2650
900
800
YE-930-315
B-925-508
29.39
32.02
45.27
50.39
26.5 HD
* with W72 frame only
** SAE = Light duty bolting, HD = Heavy duty bolting
ICAUTION
Figure 1-3 Coupling Arrangement for 900 RPM Engines/All Frames
Some applications may
require a different coupling selection from the
one shown. Superior
Analytical Department
should be
contacted to confirm
final coupling selection
on all projects.
1-26
FRM-DB-02-2004
SUPERIOR® COMPRESSORS
Couplings, continued
WH, MH, W7, & WG Frames / Engine Drive Units
Engine
Max. Coupling Superior
RPM
Size
220 BHP/100 RPM
1200
700
282 BHP/100 RPM
1200
362 BHP/100 RPM
1200
432 BHP/100 RPM
1100
550 BHP/100 RPM
1000
220 BHP/100 RPM
Hub P/N
Dimensions (inches)
REXNORD
“A”
“B”
“C”
930-738
21.50
26.69
12.44
750
925-527
22.65
27.84
13.50
800
925-509
24.40
29.59
14.75
850
939-278
25.90
31.09
15.75
925
939-247-001
27.40
32.59
17.25
1200
700
YC-901-676
26.95 22.26
29.58
12.44
282 BHP/100 RPM
1200
750
939-776
28.14 23.45
30.77
13.50
362 BHP/100 RPM
1200
800
925-508
29.39 24.70
32.02
14.75
432 BHP/100 RPM
1100
850
939-778
30.62 25.93
33.25
15.75
550 BHP/100 RPM
1000
925
939-259
32.88 28.18
35.50
17.25
900 1000
--------
36.81
18.56
MH/WH Frames:
W7/WG Frames:
688 BHP/100 RPM
W7
Figure 1-4 Coupling Arrangement
for Engines
-------
WG W7&WG
29.50
C
Engine & Motor-Driven Applications
For engine and motor-driven compressor applications, a torsional
analysis is required to select the proper coupling.
Cooper Compression
1-27
Section 1: General Data
Couplings, continued
WH, MH, & WG Frames / Motor Drive Units/without a flywheel
Engine
Max. Coupling
RPM
Superior
Dimensions (inches)
Size(AMR) Hub P/N
“A”
“B”
REXNORD
“C”
MH/WH Frames:
220 BHP/100 RPM
1200
700
930-738
18.69
23.88
9.63
282 BHP/100 RPM
1200
750
925-527
19.65
24.84
10.50
362 BHP/100 RPM
1200
800
925-509
21.03
26.22
11.38
432 BHP/100 RPM
1100
850
939-278
22.28
27.47
12.13
550 BHP/100 RPM
1000
925
939-247-001
28.59
13.25
WG Frames:
23.40
WG
W7&WG
220 BHP/100 RPM
1200
700
YC-901-676
19.44
26.77
9.63
282 BHP/100 RPM
1200
750
939-776
20.44
27.77
10.50
362 BHP/100 RPM
1200
800
925-508
21.32
28.65
11.38
432 BHP/100 RPM
1100
850
939-778
22.30
29.63
12.13
550 BHP/100 RPM
1000
925
939-259
24.17
31.50
13.25
900 1000
--------
25.17
32.50
14.25
688 BHP/100 RPM
Figure 1-4 Coupling Arrangement
for motor drive without a flywheel
C
Hub End of Motor
Face Shaft Extension
Motor-Driven Applications
For motor-driven compressor applications, a torsional analysis is
required to select the proper coupling.
1-28
FRM-DB-02-2004