Screw Compressors

Screw compressors offered by RJ Engineering Systems are individually designed to fulfill a wide variety of operating requirements. The range of screw compressors avail-able use a series of standard compressor blocks with specified auxiliary systems and accessories integrated to form a well engineered unit to suit each application. Specifications, standards, metallurgy and technical requirements laid down by industry associations, major end users, engineering consulting companies and inspection authorities are incorporated according to customer demands. RJ Engineering Systems offers one of the largest range of air compressors in both oil free screw type and oil injected screw type constructions. In addition to the standard configurations listed, compressors using diesel engines and turbines as drivers are available in a wide range of capacities to meet project requirements.

Screw Compressors for Air Oil Free & Oil Injected

Custom Engineered Solu ons

RJ ENGINEERING SYSTEMS, INC

In Oil Free Screw compressors, the rotors run without contact with each other, with the help of timing gear wheels in the gear box driving the stages. There is no metallic con-tact to the casing as well. The process conveying chambers remain oil free with the help of combination labyrinth seals on the oil side and floating ring seals and barrier rings on the conveying chamber side. Positive isolation between the two seals provided by atmospheric vent ports ensures oil free service. The first stage rotors and inside of the housing are coated with non-abrasive high temperature proprie-tary coating (UltraCoatTM) for corro-sion prevention and increased effi-ciency. Second stage rotors are stainless steel, to eliminate corro-sion possibilities during shutdown and standby operation. Oil free screws are typically two stage units, to meet the utility and instrument air pressure requirements in the industry. Single stage units are offered as process air compressors. Single stage booster compressors used for pressure boosting of compressed air or nitrogen are available from the same base compressor blocks. The special design of the compressor blocks with option of larger profile clearances with low pressure drop vent porting and oil cooled jackets afford the compressors with

high pressure ratios and high ambient tem-perature capabilities. Most of the two stage units can provide up to 11.5 barg/181 psig at the discharge flange, as shown in the list-ing. The units are rated for an ambient tem-perature range of -20C/-4F to 50C/122F, without any deterioration in performance values. Higher ambient temperature designs are also available utilizing larger profiles and custom gears. Single stage units can provide up to 3.5 barg/50 psig at the discharge flange. Booster compressors use inlet pres-sure of 4 barg/58 psig or below and offer performances similar to the two stage units.

RJ ENGINEERING SYSTEMS, INC Custom Engineered Solu ons

Oil Free Screw Compressors:

The Oil Injected Screw Compressors have the rotors contact each other at the lobe surface through an oil film. Oil is supplied to the bearings, seal and the conveying chamber to act as a lubricant, coolant and sealant. The male rotor is driven directly or through an integral gear box. Some of the frames can be belt driven, for very compact in-stallations. The triple lip oil seal at the drive shaft end seals off the conveying chamber. Special return paths to the suction side ensures leak free service. There is a provision for seal leakage monitoring, in high pressure models. Oil injected units can deliver very high compression ratios, which are limited only by efficiencies. The range offered includes single stage and two stage units, with inter-stage cooling in two stage units achieved through an oil curtain between the rotor assemblies. The oil injection is final pressure dependent and typically does not em-ploy a pump; some of the high capacity and two stage units employ shaft driven lube oil pumps, to effectively ensure cooling while running unloaded. With recommended oils, discharge temperatures up to 110C/230F are possible,

which allows operation in elevated ambient temperature and high humidity conditions. Single stage units can deliver up to 16.9 barg/245 psig, and two stage units up to 34.4 barg/499 psig at the discharge flange as shown in the listing. The units are rated for ambient temperature range of -20C/-4F to 60C/140F.


Oil Injected Screw Compressors:

Proven air ends: More than 50 years of service behind the majority of both oil

free and oil injected air ends involved in the models offered. The rotor profiles have been engineered and perfected over the

years to provide maximum performance - efficiency combination. Heat cured UltraCoatTM on rotors and housings of oil free air

ends, for years of trouble free performance. Second stage rotors are stainless steel for long term corrosion protection.

Precision gearing as per AGMA Q13/DIN Class 5. Low bull gear speeds and generously sized bearings for high

capacity compressors for increased life. Non contact SS Floating seals and barrier seals opposite time

proven labyrinth seals for oil free air ends for clean and impurity free service.

Triple lip seals and special return paths for oil injected air ends for years of leak free service.

Complete Units: Single or Two stage compressors with driver, suction filter, inter

cooler, after cooler, condensate separators, oil separators, pulsa-tion dampers and lube oil system completely piped and wired with controls.

Design and construction as per ISO 10440-2 for oil free compres-sors. API 619/ISO 10440-1 compliance and construction as op-tions, for both oil free and oil injected compressor units. API 614 lube oil systems with duplex pumps, filters and coolers and API 671 couplings are also available.

Air cooled or water cooled inter cooler, after cooler and oil cooler, as per customer requirements.

Design and construction of moisture separators, oil separators and coolers available in ASME Sec VIII Div 1, API 660/TEMA and API 661 as options.

Piping design to ASME B31.3 or customer specifications, as options.

Diesel engines and Steam turbines as driver options for the com-plete range, in addition to the IEC and NEMA frame motors.

Hazardous location design and construction for motors, engines, turbines, instruments, control panels and electrical enclosures available: NFPA 70 /NEC/IEC/ATEX Directive 94/9/EC.

Sound attenuating and protective enclosures for all units noise levels less than 80 dba.

Outdoor and extreme weather protection enclosures, with low am-bient temperature protection, as options.


Design & Construction:

Air ends: Gray Cast Iron Casings with Forged steel first stage rotors and

Stainless steel second stage rotors, as standard for oil free com-pressors. Casing and steel rotors coated for efficiency and corro-sion protection.

Gray Cast Iron Casings with Forged steel rotors, as standard for oil injected compressors.

API 619 compliant oil free air ends available, with mandated testing and inspection.

Ductile Iron casings available as an option for oil free compressors.

Radiography, Magnetic Particle Inspection, Ultrasonic Inspection & Dye Penetrant Inspection available for casings and rotors.

Spectrographic analysis, tensile, bending, hardness and notch impact strength testing of material as options.

Full traceability and Certification to EN 10204 2.2, 3.1 & 3.2 for the materials as options.

Rotor Balancing certificate, Leak test certificate and Perfor-mance test of air ends, with customer/Third party witness as options.

Ancillaries: Standard air cooler bundles in aluminum with Heresite coating

for offshore/coastal service. Stainless Steel and Duplex/Super Duplex Stainless Steel air cooler bundles, with ASME Code stamps as options.

Stainless steel shell and tube coolers for water cooled units. TEMA B,.C & R designs and ASME Code stamps as options.

Standard Chromated and powder coated aluminum condensate separators. Stainless Steel or epoxy coated Carbon Steel con-densate separators with ASME Code stamps as options.

Standard Zinc coated pipes and flanges with Stainless Steel braided flexible hoses for interconnecting piping in oil free com-pressors. Stainless Steel as standard for oil injected compres-sors, to prevent oil contamination. Stainless Steel piping as option in oil free compressors.

Radiography, Ultrasonic & Dye Penetrant Inspection available for coolers, condensate separators and piping.

Stainless Steel Lube oil piping as standard. Duplex Oil filters, Duplex Oil Pumps & Oil Coolers as options. Full traceability and Certification to EN 10204 2.2, 3.1 or 3.2 as

required.


Materials & Certification:

Special Features:


Intelligent and Flexible Control Systems Microprocessor based programmable control systems

accessed through Graphic interfaces with flexibility to allow user programming and full remote connectivity.

Programmable Logic Controllers with real time maintenance indicators and automatic lube oil /coolant temperature con-trol under changing ambient conditions, with NEMA 4X/IP 66 protection.

Capacity control using Speed Control All the oil free and oil injected air ends are adaptable for ca-

pacity control by means of variable speed, in addition to suc-tion valve throttling and blow down.

Variable Frequency Drives for Electric Motors, Electronic or Hydraulic governors for Diesel engines and Turbines are inte-grated with the controls, for seamless operation.

Adjustable droop controls for load sharing.

Liquid cooled jackets for oil free air ends designed to ensure high polytropic efficiencies High pressure oil free air ends are jacket cooled by lube oil

primary circuit. This allows inlet temperatures as high as 70C/158F for the second stage/booster compressors, consid-ering air cooled intercoolers in high ambient temperature conditions. Oil cooling eliminates possibility of aqueous corrosion.

Enclosure ventilation allowing operating under high temperature conditions Dedicated fans provide forced cooling to the compressor

enclosure for engine and turbine driven units and in units with water cooled inter and after coolers.

Motor driven units have high capacity induced draft fans for cooler bundles and enclosure ventilation.

Lowest approach temperatures in the industry.

Premium Two stage air ends for high efficiency oil injected com-pressors Unique two stage design in medium to high capacity and high

pressure oil injected air ends offers energy savings of up to 15%.

Inter stage cooling by means of coolant oil curtain eliminates separate intercoolers and piping and contributes to compact units and packages.

Customization options:


Hazardous area classification Units are configured to meet hazardous area classification

requirements to comply with project specifications. Electric motors, Heaters, Instruments, Cables, Glands & Panels are selected to meet requirements of NEC, NFPA 70/IEC 60079/ATEX Directive 94/9/EC explosion proof and intrinsically safe classes, zones, categories, gas groups and temperature classes.

Customized Engines and Fans Diesel engines are customized and certified for hazardous

area operation by modification to include inlet flame arrestor, water cooled turbocharger, exhaust flexible & manifold, exhaust flame arrestor and spark arrestor and coupled with explosion proof starters, alternator, battery pack and shut-down system.

Cooler Fans and rub rings are made of spark free materials with coatings.

Special metallurgy for components Custom materials and grades are available on all

components for harsh operating environments like offshore, coastal, humid and dusty locations.

Stainless steel coolers, moisture separators, piping, instrument housings, panels, filter housings, fan casings and enclosures are available as optional alternatives to standard construction.

Weather protection Compressor enclosures can be modified for outdoor loca-

tions with rain/sleet/snow protection. Winterization options include basic Frost protection (-10C/14F),Extreme low ambient temperature protection (-32C/-25F) with flanged oil heaters, heat traced condensate, impulse & oil lines and space heaters.

Custom intake and enclosure filters are used for dusty envi-ronments.

API 619, API 614 & API 671 compliance Air ends can be ordered with API 619 Appendix F materials

and certification. Custom lube oil systems for oil free air compressors can have working and standby lube oil pumps, duplex filters and duplex lube oil coolers as per API 614 chapters 1 & 2. Shaft ends and couplings according to API 671 is offered in oil free screw compressors as an option.

Model Number No. of speed sets

Max. Discharge Pressure

Capacity (FAD*) @ Max. Discharge Pressure & Max. speed

Compressor Shaft Power @ Max. Discharge Pressure & Max. speed

Barg Psig M3/hr CFM kW hp

Min Max Min Max Min Max Min Max

50 HZ-Two Stage

SCDO2-34GR-M50 1 10.5 153 195 115 34 45

SCDO2-50-105GR-M50 18 11.5 167 295 748 176 440 51 102 68 136

SCDA2-105-230GR-M50 14 11.5 167 761 1661 448 978 109 229 146 307

SCDA2-195-410GR-M50 12 11.5 167 1379 2983 812 1756 197 409 264 548

SCDA2-360-640GR-M50 5 11.5 167 2609 4898 1536 2883 362 636 485 853

50 HZ-Single Stage

SCDA1-55-95GR-M50 7 3.5 50 614 1078 362 635 56 92 75 123

SCDA1-70-125GR-M50 10 3.5 50 764 1502 450 884 69 122 92 164

SCDA1-110-215GR-M50 14 3.5 50 1272 2682 748 1578 113 215 152 258

SCDA1-200-360GR-M50 14 3.5 50 2463 4547 1150 2676 201 356 270 477

SCDA1-310-570GR-M50 11 3.5 50 3792 7480 2232 4402 312 569 419 763

SCDA#-30-640 Compressors50 hz: Fixed Speed & Variable Speed Drive

TECHNICAL SPECIFICATIONSOIL FREE SCREW COMPRESSOR MODELS

*FAD (Free Air Delivery) measured according to ISO 1217 4th edi on, Annexure C, at 0oC , 0% RH at a suc on pressure of 1 atm

RJ ENGINEERING SYSTEMS, INC Custom Engineered Solu ons Custom Engineered Solu ons

Model Number No. of speed sets



Compressor Shaft Power @ Max. Dis-charge Pressure & Max. speed


Min Max Min Max Min Max Min Max

60 HZ-Two Stage

SCDO2-46GR-M60 1 10.5 153 260 153 42 46

SCDO2-50-125GR-M60 14 11.5 167 299 887 176 522 50 122 68 165

SCDA2-110-245GR-M60 13 11.5 167 752 1769 443 1041 109 244 146 327

SCDA2-225-400GR-M60 13 11.5 167 1611 2965 948 1745 224 400 300 536

SCDA2-355-520GR-M60 4 11.5 167 2570 3988 1513 2347 355 518 476 695

60 HZ-Single Stage

SCDA1-50-95GR-M60 1 3.5 50 506 1096 298 645 48 94 64 126

SCDA1-60-145GR-M60 11 3.5 50 660 1714 389 1009 61 141 81 189

SCDA1-115-230GR-M60 13 3.5 50 1343 2838 790 1670 117 228 157 306

SCDA1-180-370GR-M60 13 3.5 50 2123 4698 1250 2765 179 369 240 495

SCDA1-300-565GR-M60 4 3.5 50 3564 7425 2097 4370 298 565 400 758

TECHNICAL SPECIFICATIONSOIL FREE SCREW COMPRESSOR MODELS

SCDA#-40-565 Compressors60 hz: Fixed Speed & Variable Speed Drive



SCLA#-6-555 Compressors50 hz: Fixed Speed & Variable Speed Drive

TECHNICAL SPECIFICATIONSOIL INJECTED SCREW COMPRESSOR MODELS

Model Number Gear/ Speed types



Compressor Shaft Power @ Max. Discharge Pressure & Max. speed


Min Max Min Max Min Max Min Max 50 HZ-Single Stage SCLA1-6GR-M50 1 10.4 150 - 40 - 24 - 5.8 - 7.7 SCLA1-8-16GR-M50 2 10.4 150 59 124 35 73 8 15.6 10.8 20.9 SCLA1-20-100GR-M50 15 10.4 150 165 695 97 409 20.6 97 27.7 130 SCLA1-45-210GR-M50 24 10.4 150 359 1602 211 943 44 207 59 278 SCLA1-20-30IR-M50 4 10.5 153 129 197 76 116 17.8 26.6 23.8 35.6 SCLA1-370-540IR-M50 5 10.5 153 3013 4432 1773 2609 370 538 496 721 SCLA1-90-110IR-M50 3 12.0 174 685 818 403 481 91 110 122 148 SCLA1-225-360IR-M50 8 12.3 178 1638 2612 964 1537 226 356 303 477 SCLA1-4-10GR-M50 2 12.9 187 20 55 12 32 3.5 8.5 4.6 11.5 SCLA1-105GR-M50 1 12.9 187 - 723 - 425 - 101.6 - 136 SCLA1-100-115GR-M50 2 12.9 187 718 795 423 468 101 112 135 150 SCLA1-120-180GR-M50 6 12.9 187 812 1283 478 755 115 177 154 237 SCLA1-235-345GR-M50 6 12.9 187 1615 2414 950 1421 233 342 312 458 SCLA1-4-20GR-M50 5 13.4 194 24 97 14 57 4 15.5 5.4 20.8 SCLA1-250-555GR-M50 6 13.4 194 1910 3818 1125 2248 249 552 334 739 SCLA1-130-205IR-M50 12 14.0 203 922 1409 543 830 132 201 177 270 SCLA1-15-45GR-M50 3 14.9 216 95 268 56 158 15 45 21 60 SCLA1-10-60GR-M50 3 14.9 216 61 358 36 210 10 60 13 83 SCLA1-15-75GR-M50 12 14.9 216 105 403 62 237 16 72.7 21.5 97.5 SCLA1-20-95GR-M50 15 14.9 216 129 550 76 324 20 93 26.8 124 SCLA1-25-110GR-M50 14 14.9 216 155 700 91 412 24.4 109 32.7 145 SCLA1-40-185GR-M50 20 14.9 216 254 1158 150 682 39 184 52.4 247 SCLA1-60-265GR-M50 3 14.9 216 391 1282 230 754 58 184 77.5 246 SCLA1-290GR-M50 1 14.9 216 - 1940 - 1142 287 287 385 385

SCLA1-95-385GR-M50 13 14.9 216 647 2406 381 1416 95 383 128 513

SCLA1-45-200GR-M50 24 16.9 245 250 1155 148 680 43 200 57 269 50 HZ-Two Stage SCLA2-95-210IR-M50 20 14.3 208 647 1497 381 881 95 208 128 278 SCLA2-175-405IR-M50 30 14.3 208 1285 3108 756 1829 174 404 233 542 SCLA2-160-250GR-M50 7 24.0 348 897 1460 528 860 159 248 213 333 SCLA2-185-280GR-M50 8 24.0 348 1070 1714 631 1009 183 278 245 372 SCLA2-90-290GR-M50 12 34.4 499 432 1457 254 858 92 288 124 387 SCLA2-410IR-M50 1 34.4 499 - 2010 - 1183 - 407 - 545



SCLA#-6-635 Compressors60 hz: Fixed Speed & Variable Speed Drive

TECHNICAL SPECIFICATIONSOIL INJECTED SCREW COMPRESSOR MODELS


Model Number

Gear/ Speed types



Compressor Shaft Power @ Max. Dis-charge Pressure & Max. speed


Min Max Min Max Min Max Min Max 60 HZ-Single Stage SCLA1-7GR-M60 1 10.4 150 - 50 - 29 - 6.8 - 9.1

SCLA1-10-20GR-M60 2 10.4 150 72 150 42 88 9.58 18.8 12.8 25.1

SCLA1-25-105GR-M60 15 10.4 150 201 726 118 428 24.5 103 33 138

SCLA1-55-220GR-M60 28 10.4 150 438 1658 258 976 52.5 218 71 292

SCLA1-15-35IR-M60 4 10.5 153 123 244 72 143 17 34.1 22.8 45.8

SCLA1-360-635IR-M60 6 10.5 153 2917 5182 1717 3050 359 632 481 848

SCLA1-70-120IR-M60 3 12.0 174 538 863 317 508 71.3 117 95.6 157

SCLA1-235-355IR-M60 10 12.3 178 1690 2590 995 1525 233 353 312 473

SCLA1-5-10GR-M60 2 12.9 187 25 55 15 32 4.2 8.5 5.6 11.5

SCLA1-100GR-M60 1 12.9 187 - 707 - 416 - 100 - 133

SCLA1-125-190GR-M60 3 12.9 187 877 1348 516 793 124 186 167 249

SCLA1-215-330GR-M60 6 12.9 187 1497 2320 881 1366 217 329 291 440

SCLA1-5-15GR-M60 3 13.4 194 29 78 17 46 4.8 12.3 6.5 16.4

SCLA1-225-495GR-M60 7 13.4 194 1704 3523 1003 2074 223 494 299 662

SCLA1-17IR-M60 1 14.0 203 - 87 - 51 - 16.4 - 21.9

SCLA1-125-190IR-M60 12 14.0 203 866 1330 510 783 125 189 167 254

SCLA1-20-45GR-M60 3 14.9 216 116 268 68 158 18 45 24 60

SCLA1-10-60GR-M60 3 14.9 216 76 358 45 210 12 60 16 83

SCLA1-20-75GR-M60 12 14.9 216 129 398 76 234 19.5 71.2 21.5 95.4

SCLA1-20/105GR-M60 16 14.9 216 135 581 80 342 21 101 28 135

SCLA1-35-120GR-M60 18 14.9 216 221 757 130 446 34 120 45 161

SCLA1-40-200GR-M60 6 14.9 216 253 1212 149 713 39 197 52 154

SCLA1-70-230GR-M60 3 14.9 216 480 1546 293 910 70 228 93 306

SCLA1-115-325GR-M60 12 14.9 216 790 2130 465 1254 115 323 154 433

SCLA1-370GR-M60 1 14.9 216 - 2320 1365 1365 363 363 - 486

SCLA1-50-215GR-M60 22 16.9 245 308 1196 181 704 51 211 83 283 60 HZ-Two Stage SCLA2-100-2054IR-M60 20 14.3 208 694 1468 409 864 100 204 135 273

SCLA2-210-415IR-M60 30 14.3 208 1577 3160 928 1860 208 412 278 552

SCLA2-155-265GR-M60 6 24.0 348 897 1533 528 902 159 263 213 352

SCLA2-190-340GR-M60 6 24.0 348 2048 1714 646 1206 186 338 249 454

SCLA2-110-330GR-M60 10 34.4 499 528 1620 311 954 110 330 147 443


RJ Engineering Systems, Inc 13805, West Road Suite 350 Houston, TX-77041 USA Tel: +1-281-897-0350 Fax: +1-281-897-0355 E-mail: [email protected] www.rjesusa.com


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