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