OIL-FREE, ROTARY SCREW AIR COMPRESSORS 40-500 HP …

1 -500 HP170 -2400 SCFM40 -150 PSIGOIL- free , ROTARY SCREW AIR COMPRESSORSTwo-stage, Air- cooled and water - cooled Fixed Speed or VFD71546 KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 1 High Quality, Quiet and Energy EfficientThe Kobelco KNW Seriesassembly is designed and constructed to exacting quality standards result inassemblies with longoperating life, minimummaintenance and lowoperating Kobelco KNW Series oil- free ROTARY SCREW aircompressor is designed,manufactured, assembled, andtested in the United Statesand is delivered ready foroperation. The two-stagerotary SCREW compressorprovides completely oil-freeair because no oil is allowedin the compression compressor air end is aheavy-duty, two-stage design with each stage drivenby a common gear.

2 Thesecomponents are arranged in a single modular design toform a compact unit which is mounted on vibrationisolators to a structural steelbase. No special foundationconsiderations are compression stagesemploy a new patentedSuper Rotor design, which isacknowledged to be the mostefficient, two-stage, oil-freerotary SCREW air compressoron the market. This newasymmetric rotor profile,provides the lowest powerconsumption per cubic foot of compressed air. Kobelco is the international trademark of Kobe Steel, efficiency is furtherenhanced by a uniqueload/unload control systemthat is simple and trouble model71546 KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 2 Simple and Efficient with High ReliabilityThe sound attenuatedenclosure assures quietoperation.

3 Doors are hingedand pinned allowing easyremoval for inspection KNW Series precisionmachined timing gears aremounted on each rotor shaftto maintain accurateclearances between therotors. The bearings are anti-friction type for long life andsmooth operation. The electric motor is directlycoupled to the input driveshaft through a thrust is reduced byincorporating an air pressureoperated thrust balance pistonon each stage. Thisarrangement minimizes thrustloading thus increasing bearing life. The state-of-the-art programmable microprocessorcontroller maximizes operating efficiency model71546 KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 3 Dual Vent Seals withStainless Steel RingsEach shaft seal consists of floatingstainless steel rings and an oillabyrinth inserted between the rotorchamber and the bearings.

4 Each seal is buffered by gas from thecompression chamber which is purgedto atmosphere ensuring that nolubricating oil or its vapor can enterthe compression Design FeaturesLubrication of Gears and BearingsLubrication prior to start-up, duringoperation and after shutdown issupplied by an independent motordriven gear pump. Compressoroperation is not allowed until oilpressure is established. During thecoast down period the oil pumpcontinues to provide full lubricationuntil the compressor stops. This designincreases gear and bearing life and isnot standard on competitive 1 Vent 2 Designed, manufactured and assembled in the USA.* Patent Numbers 4583927 and 4671749 Oil PumpFilterLevel GaugeCoolerHigh Efficiency RotorsThe new patented Super Rotor* profileis the most efficient in the machined forged steel rotor setshave the most precise tolerances in the industry.

5 FDA approved rotorcoating further increases volumetricefficiency for the life of the machine. Two-stage oil- free compression KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 4 Component Arrangement Showing Typical Air Flow ( water - cooled )Load and Unload Control or VFDBoth controls provide energy efficient operation while eliminating adjustments and minimizing maintenance. When the compressor unloads the brake horsepower drops to approximately 18% of full load, significantly reducing overall energy cost. The compressor will shut down after operating unloaded for a period of time and will automatically restart on pressure Control ValveDiagram showing the controlvalve assembly in both theunloaded (top portion) andloaded (bottom portion) Control Valve The efficient and simple capacity control system is aload/unload type with a directoperating disc valve and no dischargeair recirculation.

6 During unloading thebleed-off air is released to atmospherethrough a muffler. The control is anelectro-pneumatic device using onlyspring and air pressure. No oil orhydraulic cylinders are used in theoperation of this InletAftercoolerAir DischargeLow Pressure StageHigh Pressure StageIntercoolerLoadedLoadedUnloadedUnlo adedLoaded100%100%18%90%Discharge PressurePower ConsumptionTimeKey to illustrations VacuumAtmospheric PressureInterstage PressureDischarge PressureLubricating OilPower Consumption71546 KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 5 Touchscreen Operator Interface6 Installation and Start-up SupervisionA factory trained field representativewill supervise installation and same representative will also train your maintenance personnel inthe operation and maintenance of the assembly.

7 Our commitment is to provide a trouble free , reliableinstallation of which we can both be Display withGraphicsComplete status indication is displayedcontinuously during operation, whilein stand-by or after emergencyshutdown. Discrete push buttons withlights for quick indication of operatingstatus. Ethernet card with emailcapability also available (optional).Allen BradleyProgrammable Logic ControllerThe microprocessor initiates andsequences the proper events duringstart-up, operation and shutdown. It monitors system functions, safetydevices and instrumentation. Themicroprocessor incorporates anerasable programmable read onlymemory chip (EPROM) for permanent program storage. Programs can bechanged to meet various plantrequirements. In addition, interfacingwith other equipment and plantmonitoring systems is easilyaccomplished.

8 Ethernet option isavailable for internet or Allen-Bradley PLCB uilt in sequencing capability up to four COMPRESSORS . Interfacing with plant monitoring systems easily accomplished (optional).(Optional Allen Bradley Ethernet Communication module shown)71546 KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 6 Rogers KNW Series Heat of Compression Regenerative Air DryersStandard Equipment and Safety Devices7 Safety DevicesAll safety shutdowns are indicated bymessage on display and alarm light. compressor motor overloadshutdown and light Oil pump motor overload shutdown and light Fan motor overload shutdown and light High first stage air dischargetemperature shutdown and light High second stage suctiontemperature shutdown and light High second stage air dischargetemperature shutdown and light High oil temperature shutdown and light Low oil pressure shutdown and light High cabinet temperature shutdownand lightService Indicators Air inlet filter condition indicator Oil filter condition indicator Oil level gauge Routine maintenancePressure Indicators First stage air discharge Second stage air discharge Oil pressure First stage suctionTemperature Indicators First stage air discharge Second stage air inlet Second

9 Stage air discharge First stage suction Aftercooler temperature shutdownand light Starter failure light Temperature pre-shutdown alarm Relief valveAdditional Devices Start/stop push buttons Lamp test Audible alarm Acknowledge switch Reset switch Common alarm contacts for remote indication Event alarm log SAE oil circuit fittings Petes plugs for pressure transmitterlocations Emergency stop buttonHeat of Compression Dryer Benefits Zero purge air loss Lowest energy cost of any type ofdryer Low dewpoint suppression Simple design Minimum maintenance Delivered with interconnectingpiping and after filter Ask for bulletin #KNWHOC 0703 formore details Lube oil Aftercooler temperatureAdditional Indicators Stand-by mode light Oil pump run light Fan run light compressor run light compressor load light Alarm light Hour meter running time Hour meter loaded time Manual unload light and switchControls and InstrumentationDesigned specifically for use with Kobelco KNW Series Oil free compressorsWater - cooled assembly 71546 KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 7 Rogers Machinery Company, 72nd AvenuePortland, Oregon Box 230429 Portland, Oregon 97281-0429503/639-0808 Fax Offices.

10 Columbus, OHHouston, TXNewark, NJSan Jose, CAKNW (01-10)Litho in USAD esigned, manufactured and assembled in the Subject To ChangeWithout NoticeCompressed air discharged from thiscompressor should not be used forbreathing air unless properly purified. Kobelco and Rogers Machinery Company, Inc. assume noresponsibility or liability for thepurchaser s breathing air KNW 8pgr_r1:71546 KNW 8pgr 1/22/10 6:11 PM Page 8