Sigma Rotary Screw Compressors 3 to 30 hp

Kaeser rotary screw belt drive models Product Range Sizes from 3 hp to 30 hp Flows from 9 to 124 cfm Standard pressures* 125, 160 and 217 psig Special pressures available Special application modifications available Kaeser rotary screw belt drive models *Pressures above 160 psig not available in 3 hp models

Airend The heart of a Kaeser compressor: All components manufactured by Kaeser Strict quality control standards and testing ensure optimum performance Sigma Profile airend

Airend Rotor Milling Process Airend Rotor Finishing Precision ground rotor finish: Creates less fluid friction and shear Helps increase energy efficiency Airend Rotor Milling Process

The Sigma Profile Advantage Kaeser proprietary design 5:6 unequal bore rotor combination and closer tolerances reduce back-flow Rounded edges reduce fluid friction and shear More cfm per input kW! Kaeser's Sigma Profile

Kaeser Mechanical Shaft Seal Components Airend Mechanical Shaft Seal No maintenance, high quality mechanical shaft seal: Designed and manufactured exclusively by Kaeser Strict quality control measures ensure optimum performance Kaeser Mechanical Shaft Seal Components

Drive Motor Premium efficiency means less input power Meets or exceeds EISA requirements TEFC protection against dust and dirt Class F insulation Drive Motor

Single ribbed v-belt and pulley Belt Drive Quiet and dependable Easy to align Allows pressure and flow changes in the field Reduces footprint Motor/airend protection Single ribbed v-belt and pulley

Automatic belt tension visual indicator Automatic Belt Tensioner Maintains proper tension Maximizes efficiency Prevents over-tensioning Prolongs belt life Easily adjustable with visual indicator Automatic belt tension visual indicator

New Style V-Belt New elastic belt design on SX and Airtower™ models Alignment notches indicate proper belt tension New elastic belt design on SX and Airtower™ models No re-tensioning required after installation New belt tension indicator

Premium quality inlet filter Heavy Duty Inlet Air Filter Premium quality 1 micron filter protects: Airend Oil cooler Valves Oil separator Reduces maintenance Increases service-life (reduced wear) Maximum efficiency Premium quality inlet filter

Normally closed piston style inlet valve interior view Normally Closed Inlet Valve* Energy efficient unloaded starts help increase motor life Fast acting check function prevents back-flow at shut- down Large diameter valve plate minimizes: Flow restrictions Wear on moving parts Tight seal Heavy duty spring Vent Normally closed piston style inlet valve interior view *Inlet valve shown does not represent Airtower™ models

Minimum pressure check valve for SX and Airtower™ models Ensures sufficient pressure to circulate oil during idle Eliminates need for oil pump Prevents venting system pressure when compressor idles or is off Minimum pressure check valve for SX and Airtower™ models

SM series separator tank ASME certified tank Reservoir for compressor lubricant Separates oil from airstream Includes: Safety relief valve Pressure gauge Quick disconnect fittings Lubricant level indicator SM series separator tank

Spin-on separator cartridge Oil filter New design on SX and Airtower™ models Mounted with several other components on combination block to save space 1-3 ppm oil carry-over

Strategically located vibration isolators Vibration Isolation Strategically located vibration isolators: Reduce stress on pipe connections Lessen stress on motor and drive system Help minimize overall package noise levels Strategically located vibration isolators

Airtower™ piping connections Pipe Connections Pipes made of steel and feature flexible connections Fittings sealed with special compound for extra leak protection Airtower™ piping connections

Thermostatically controlled combination valve Thermostatically Controlled Lubricant Circuit Helps prevent internal condensation which: Increases equipment service-life Eradicates moisture related maintenance and repair requirements Thermostatically controlled combination valve

Fluid cooler represents 80% of cooler area Maintains optimal operating temperature Thermostatically controlled Quick disconnect fitting and ball valve allow complete fluid change Air-cooled Fluid cooler represents 80% of cooler area

Aftercooler represents 20% of cooler area Approach temperature range between 10.8°F and 18°F Condenses 50-80% of moisture from the compressed air stream Air-cooled *No aftercooler on Airtower™ models Aftercooler represents 20% of cooler area

Cabinet cooling air intake Motor cooling air intake Dual Flow Cooling Fan Featured on SX, SM, SK and AS models Cast as single piece to ensure: Perfect balance Low vibration Quiet operation Mounted on non-drive end of motor for optimal cooling effect Dual-flow fan isolates multiple cooling air intake paths with single fan Cabinet cooling air intake Motor cooling air intake

Rugged construction, sleek appearance Full Steel Enclosure* Durable powder-coated finish Thick soundproofing for very low noise levels Locking doors and panels for safety Enclosure gaskets and pre-filter for protection from dirt and dust Heavy-gauge steel frame and floor Rugged construction, sleek appearance *Except Airtower™ models

Cover easily removed for access to components Single Piece Molded Cover Exclusive to Airtower™ models Light-weight, durable roto-molded polyethylene material resists scratches and dents Cover easily removed for access to components

Sigma Control Basic™ PLC controller Sigma Control BasicTM Standard on SX, SM, SK, AS and Airtower™ models Simple and reliable interface Password protected Displays: Discharge pressure Discharge temperature Load and service hours Fault indications Sigma Control Basic™ PLC controller

Sigma ControlTM and Sigma Control 2™ Optional on SX, SM, SK* and AS models Provides detailed operating and maintenance information Alarms and message history aid troubleshooting Programmable timer and alternate pressure setting for operating schedule and two unit sequencing Multi-level password protection Sigma Control™ *Sigma Control 2™ initially available on SK model only Sigma Control 2™

Sigma ControlTM and Sigma Control 2™ Multiple analog and digital I/O ports for remote start / stop and additional sensors User friendly touch pad with LCD panel Multiple languages Industrial microprocessor Certified EMI (Electro Magnetic Interference) protection Sigma Control™ Sigma Control 2™

Easy to read display and RFID reader Sigma Control 2™ Initially only available as an option on SK models Will be integrated as an option on all belt drive models in coming months Easy to read display and RFID reader

Wye-Delta Start Lower in-rush current; lower peak demand charges Reduces bearing loads Standard on 4 hp* through 30 hp models * Direct on-line starting on SX 3 and single- phase models

Airtower™ 5C featuring start / stop control Exclusive to Airtower™ models Unit only runs when air is needed Shuts off immediately upon reaching set pressure

SFC 8 with Siemens AG MICROMASTER Drive SFC Option SFC 8 - SFC 18S Matches power to demand Near unity power factor Siemens AG MICROMASTER Drive MM 420 used in SFC 8 and SFC 18S models Siemens Sinamics Drive G120 used in SFC 11 and SFC 15 SFC 8 with Siemens AG MICROMASTER Drive

AS 25 T showing built-in integral refrigerated dryer Integral Dryer Option Available on all belt drive models Dryer sized to match compressor capacity* Controller operates compressor and dryer Single-point hook-up simplifies installation Stainless-steel, plate type heat exchanger Integral dryer AS 25 T showing built-in integral refrigerated dryer *When operating at rated conditions

AirCenter™ Simplex with AS 25 T Compressor - Dryer Combinations AirCenter™ Simplex with AS 25 T SK 15 AirCenter™

SK AirCenter™ with optional Sigma Control 2™ AirCenter™ Simplex and Duplex Series Sigma screw compressor(s) Refrigerated air dryer ASME coded receiver tank including Air pressure safety relief valve Pressure gauge Manual drain valve Heavy duty steel frame Duplex packages include sequencing capabilities SM AirCenter™ Simplex SK AirCenter™ with optional Sigma Control 2™ AS AirCenter™ Duplex

Warranty and Parts Guarantees Two-year warranty on airend, motor and Sigma ControlTM 24-hour emergency parts shipping guarantee for the first 5 years Optional five-year warranty available