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Suflante industriale de aer pentru aplicatii edilitare si industriale KAESER KOMPRESSOREN

Suflante KAESER – Soluții de joasă presiune KAESER KOMPRESSOREN LOW PRESSURE

Limba: Engleza

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Tip documentatie: Fisa tehnica

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KAESER Blowers e r u s s e r p w o L solutions Rotary Lobe and Rotary Screw Blowers Flow rate 0.6 to 160 m³/min Pressure differential: Gauge pressure up to 1100 mbar, Vacuum up to 550 mbar Magnetic Bearing Turbo Blowers Flow rate up to 267 m³/min, Pressure differential 0.3 to 1.3 bar www.kaeser.com KAESER blowers The world-renowned compressor and blower manufacturer Established by Carl Kaeser Sr as a machine workshop in 1919, KAESER started on the road to becoming one of the world’s leading compressed air systems providers when the first reciprocating compressor left the Coburg production line in 1948. The final breakthrough came in the early 1970s with the development of the rotary screw compressor featuring the energysaving SIGMA PROFILE. Gera plant In 1991, KAESER acquired the “Geraer Kompressorenwerke”, a company with a proud heritage forged over more than 100 years of compressor and blower manufacture. Production of KAESER’s newly developed OMEGA rotary lobe blowers

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began at the plant in Thuringia in 1993 and today these highly efficient systems are exported, together with all necessary accessories and equipment, to every 2 corner of the globe. Covering an area of over 60,000 m², the Gera facility currently employs approximately 300 people producing KAESER’s extensive range of rotary lobe blowers, rotary screw blowers and compressed air refrigeration dryers. All companies in the international KAESER group are linked by the very latest information and network technology. Contents How a KAESER rotary lobe blower works...................................................................................................................... 04 How a KAESER rotary screw blower works................................................................................................................... 05 Rotary screw blowers with the SIGMA PROFILE........................................................................................................... 06

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-07 CBS – HBS series, SFC/STC version – Dependable and efficient................................................................................. 08-09 Rotary lobe blowers with the OMEGA PROFILE............................................................................................................ 10-11 BBC – FBC series, OFC/STC version: Optimised complete blower systems................................................................. 12-13 SIGMA CONTROL 2 blower controller........................................................................................................................... 14-15 Rotary lobe blower packages: BBC – HBC series........................................................................................................... 16-17 Premium blowers: HB – PI series................................................................................................................................... 18-19 Magnetic bearing turbo blowers....................

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................................................................................................................. 20-21 Complete solutions from a renowned systems provider................................................................................................. 22-23 Accessories.................................................................................................................................................................... 24-25 Special versions............................................................................................................................................................. 26-27 Advanced manufacture................................................................................................................................................... 28-29 Technical specifications.................................................................................................................................................. 30-31 Fields of a

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pplication Food processing General industry Beverages industry Chemicals industry Mining Water management Transportation Burner air supply Bulk materials conveying Marine applications Efficient and oil-free gas transportation, pneumatic conveying of bulk materials, drinking and wastewater treatment (filter cleaning and clarification tank aeration), liquid homogenisation and forced air systems for combustion equipment; the possibilities are almost endless – KAESER blowers are as versatile and varied as the applications for which they are used. 3 How a KAESER rotary lobe blower works The pressure build-up process – the images show a cross-sectional view through the flow chamber of the KAESER OMEGA rotary lobe blower block. Intake Pressure build-up Oil-free, isochoric compression process As the intake air passes through the flow chamber inside the rotary lobe blower, its volume remains constant (isochoric process). Actual compression takes place outside the blower blo

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ck, with the accumulation of the air mass taking place during the subsequent process. This “adaptive” compression always produces only as much pressure as is needed by the process in question. This makes rotary lobe blowers particularly well suited to applications where they spend a relatively high proportion of their time at Idle (such as pneumatic conveying) and/or applications with heavily fluctuating pressure. Air expelled Flow chamber completely evacuated The numbers correspond to the points in the pressurevolume diagram. 1) Intake and capture of atmospheric air (left rotor). 2) Air is conveyed towards the pressure side; pressure increase commences at the 120° angle of rotation due to the prior influx of air that has already been compressed. 3) Compression in the flow chamber ceases; discharge commences. 4) Conveyed air mass is discharged into the process. Pressure (p) Volume (V) ■ Thermodynamic energy consumption The pressure-volume diagram (PV diagram) illus

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trates the compression work / energy expended for compression by means of the area depicted in blue between points 1 to 4. Image: OMEGA block 4 How a KAESER rotary screw blower works The pressure build-up process – the images show cross-sectional views of the enclosed air volume within the KAESER SIGMA-B rotary screw blower airend, seen from the pressure side of the rotor pair. Intake air is captured Volume is reduced Oil-free, isentropic compression process As the intake air passes through the flow chamber inside the rotary screw blower, its entropy remains largely constant (isentropic process). Actual compression takes place inside the airend: the volume of air is continuously reduced until the moment of discharge and is pushed out under pressure – since less effort is required for compression of the same air volume, energy consumption is reduced. Rotary screw blowers are the ideal solution for applications with more or less constant pressure and high running performance r

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equire- Expelled to pressure side Flow chamber completely evacuated ments, such as clarification tank aeration at wastewater treatment plants, flotation, etc. The numbers correspond to the points in the pressurevolume diagram. 1) Intake and capture of atmospheric air. 2) Air conveyed towards the pressure side for discharge. 3) Pressure increases due to volume reduction. 4) Compressed air is expelled. Pressure (p) Volume (V) ■ Thermodynamic energy consumption ■ Energy savings The pressure-volume diagram (PV diagram) illustrates the compression work / energy expended for compression by means of the area depicted in blue between points 1 to 4. Image: SIGMA blower airend The orange area depicts the potential energy savings when a rotary screw blower is used in comparison to a conventional rotary lobe blower (roots blower), provided no over-compression occurs. 5 6 CBS, DBS and EBS drive concept FBS belt drive – refined to perfection In CBS, DBS and EBS series rot

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ary screw blowers, power is transferred from the motor to the blower airend via integrated gearing. This has proven to be the best solution for the prevailing speeds in this performance and size class when it comes to efficiency, reliability and durability. The pivoting motor base with tensioning spring ensures precision belt tensioning, irrespective of motor weight, thereby providing optimum levels of transmission efficiency at all times. As a result of the company’s decades of experience in compressor design and engineering, this approach to power transmission has been refined to perfection. Rotary screw blowers – with the efficient SIGMA PROFILE Developed at the company’s in-house Research and Development Centre, KAESER rotary screw blower airends with their world-renowned SIGMA PROFILE rotors are up to 35% more efficient than conventional compressor designs. They also benefit from a particularly broad control range and virtually constant specific package input power. In ad

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dition to efficiency, durability was also an essential development objective. The use of high-tech bearings and the fact that no ancillary equipment is required serves to minimise energy consumption whilst also enhancing reliability. Technical specifications: CBS, DBS, EBS, FBS, HBS series Usable flow rate: 4.5 to 160 m³/min Pressure differential: - Gauge pressure up to 1100 mbar - Vacuum up to 550 mbar Guaranteed performance specifications 1217:2009 To ensure that the projected savings are actually achieved during operation, KAESER quotes effective overall power consumption figures, as well as the usable flow rate, in accordance with the stringent tolerances of ISO 1217, Annexe C or E (as applicable). Dependable seals Durable bearings Field-proven in KAESER rotary screw compressors, the sliding ring seal for the rotary transmission drive shaft lead-through on the blower airend is maintenance-free and provides a dependable sealing, even in hot and dusty environments. Four hea

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vy-duty roller bearings absorb 100% of the radial forces exerted on the cylinders, guaranteeing a long service life for the rotary screw airend. The rolling elements are encased in high-tech cages for optimum lubrication at all speeds. No additional oil pressure lubrication is required. 7 Rotary screw blowers – CBS, DBS, EBS, FBS & HBS, SFC/STC version KAESER rotary screw blowers are user-friendly turnkey systems, delivered ready for immediate operation. All that is needed is to connect them to a power supply and the air network; the laborious processes of oil-filling, drive belt installation, motor adjustment, procurement of a suitable frequency converter, programming, cabling in accordance with EMC regulations, drawing wiring diagrams, arranging CE and EMC-certification, etc. are thankfully consigned to the past. Procuring complete, certified machines from systems manufacturers ultimately saves you both time and money, whilst guaranteeing many years of reliable operation. SFC v

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ersion: Variable speed with frequency converter STC version: With Y-Δ-Starter 0.014bar 0.014bar 107.8m /min Run: 2h 8 66% 0.482bar 15 C 3003rpm 68 C Maintenance in: 2997h SIGMA CONTROL 2 controller Seamless system monitoring The SIGMA CONTROL 2 ensures efficient blower control and system monitoring at all times. Numerous interfaces enable rapid communication with control centres via data bus, whilst the SD card slot ensures data storage and updates are a breeze. Various operating modes are selectable on SFC/OFC machines. Sensors for oil level and temperature monitoring are integrated into the blower airend. The oil chamber is designed to ensure dependable oil level measurement in all operating phases. Specific pack age input powe r (kW/m³/min) Conventional sp eed control Efficient KAES ER variable speed control Delivery volum e (m³/min) Cool inlet air Optimised specific package input power Process air and cooling air for the motor are drawn in separately from o

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utside the housing. This boosts efficiency and leads to a higher usable air mass flow rate for the same power consumption. The blowers can operate at full capacity in ambient temperatures up to +45 °C. The moderate maximum speed, an extra-dense screw profile and near constant specific package input power across a broad, variable-speed control range all combine to achieve significant energy savings across the entire operating curve. 9 10 Durable OMEGA blower block Durable bearings The OMEGA blower block delivers pressures up to 1000 mbar(g), block discharge temperatures up to 160 °C, a broad control range with speed-controlled operation, Q 2.5 rotor balancing for quieter operation, extended service life and minimal maintenance requirements. Heavy-duty cylinder roller bearings absorb 100% of the continuously changing radial gas forces. As a result, they avoid the springing effect of self-aligning bearings and last up to ten times longer with the same load. Rotary lobe blowers

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– Air at the touch of a button The special OMEGA Profile featured on KAESER’s three-lobe rotary lobe blowers makes these machines true masters of energy efficiency. The long-term dependability and durability of these units are legendary. These qualities can be attributed to design features such as the use of straight-cut timing gears, heavy-duty cylinder roller bearings and precisely balanced rotors. Technical specifications for the full, connection-ready version: Usable flow rate: 1.5 to 72 m³/min Pressure differential: - Gauge pressure up to 1000 mbar - Vacuum up to 500 mbar Precision manufacture/synchronisation Stable rotors KAESER blower blocks feature high-precision, 5f 21 quality straight-cut timing gears with minimal flank clearance, which play a major role in contributing to the block’s outstanding volumetric efficiency. Since the straight-cut gearing is not subjected to continuously changing axial gas forces, heavy-duty cylinder roller bearings can be used. An ext

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remely high rotor balancing quality of Q 2.5, combined with the rotors’ single-piece design including the shaft ends, ensures a vibration-free, low-noise operation. Rotor tips with integrated sealing strips make the blower block more resistant to dust particulates and thermal stress. 11 Complete, turnkey rotary lobe blowers BBC-FBC series, OFC/STC version KAESER’s turnkey COMPACT series blowers with OMEGA PROFILE rotors provide more than just a dependable and energyefficient performance. Delivered ready for connection, complete with all sensors, star-delta starter (or frequency converter) and CE/EMC labelling, they significantly reduce the work and costs required for planning, installation, certification, documentation and commissioning. 12 START CONTROL (STC) Variable speed control The version with integrated Y-Δ-starter operates at a constant speed and is equipped with a premium contactor, overcurrent relay and phase sequence monitoring. A SIGMA CONTROL 2 controller and d

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ependable emergency stop system complete the package. With OMEGA FREQUENCY CONTROL (OFC), the frequency converter uses speed control in order to adjust the delivery volume of the blower to match the required air demand. Everything is delivered ready for immediate operation, since all programming and parametrisation is carried out at the factory. Plug-and-play EMC-tested and certified complete system Turnkey blowers not only come complete with all necessary sensors, STC/OFC, SIGMA CONTROL 2 and emergency stop switch, but are also ready-filled with oil and fully certified. This significantly reduces the work and costs required for planning, installation, documentation and commissioning. To ensure seamless integration into any operating environment, the electromagnetic compatibility (EMC) of all components and of the complete machine has been tested and certified in accordance with all applicable regulations. 13 Automatic SAM 4.0 / 4 Compressors Pressure curve C1 - ASD 60 SFC

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1 Pressure curve 2 3 7.18 bar 4 Current values 30.10.2020 09:12:47 Pressure performance Required pressure Pressure range limit Volumetric flow rate 99.56 bar 7.00 bar 8.40 bar 11.06 bar C2 - ASK 40 8.5 C3 - BSD 75 8.0 EN 5 Status History Network pressure 7.18 bar Messages Monitoring 12.0 11.0 Energy & Costs 9.0 7.5 m³/min bar 10.0 C4 - BSD 75 8.0 Maintenance Control 7.0 7.0 Time Control 6.0 6.5 Initial Start-up C1 Configuration C2 C3 C14 08:45 08:55 08:55 09:00 09:05 09:10 Time Status - Overview i Contact Digital output device, e.g. laptop Control centre Control centre KAESER CONNECT Automatic SAM 4.0 / 4 Compressors Pressure curve C1 - ASD 60 SFC 1 Pressure curve 2 3 7.18 bar 4 Current values 30.10.2020 09:12:47 Pressure performance Required pressure Pressure range limit Volumetric flow rate 7.18 bar 99.56 bar 7.00 bar 8.40 bar 11.06 bar C2 - ASK 40 8.5 C3 - BSD 75 8.0 EN 5 Status History Network

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pressure Messages Monitoring 12.0 11.0 Energy & Costs 9.0 7.5 m³/min bar 10.0 C4 - BSD 75 8.0 Communications module (e.g. Modbus TCP) Maintenance Control 7.0 7.0 Time Control 6.0 6.5 Initial Start-up C1 Configuration C2 C3 C14 08:45 08:55 08:55 09:00 09:05 Status - Overview 09:10 Time Contact i SIGMA AIR MANAGER 4.0 KAESER SIGMA NETWORK Blower station Controller: SIGMA CONTROL 2 Industrie 4.0 – Join the network With the SIGMA CONTROL 2 blower controller and SIGMA AIR MANAGER 4.0 master controller, all blower stations can be integrated seamlessly into Industrie 4.0 environments, thereby allowing continuous system optimisation through analysis of operating data and providing demand-oriented preventative maintenance and servicing (Predictive Maintenance) via remote diagnostics (Condition Monitoring). 14 Intelligence inside: SIGMA CONTROL 2 blower controller ® Based on industrial PC technology, the SIGMA CONTROL 2 internal blower controller uses a

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range of sensors to monitor and control all relevant machine and process parameters for a reliable and economical operation. The availability of remote monitoring and control serves to optimise blower availability and efficiency even further. A variety of communications modules enable blower systems equipped with SIGMA CONTROL 2 to connect to master control systems such as the SIGMA AIR MANAGER 4.0 and/or other centralised control systems via data bus. 0.014bar 0.014bar 107.8m /min Run: 2h 66% 0.482bar 15 C 3003rpm 68 C Maintenance in: 2997h The control centre Stay connected The control unit features an easy-to-read display and durable input keys, whilst a clear menu structure with 30 selectable languages enables universal operation. A variety of operating modes are selectable on SFC/OFC machines. The Ethernet interface (10/100 Mbit/sec) allows users to call up operating parameters on any Internet browser via the integrated web server. Optional communication modules: Profibus

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DP, Modbus RTU and /TCP, Profinet IO and EtherNet/IP. SIGMA CONTROL 2 1-default read => write Logout Contact/Service Graphs Time: 02/10/2014 04:11:40 pm p1 / bar t1 / °C 1.0 28 0.5 26 0.0 24 p1: 0.00 bar t1: 23.3 °C System status Graphs Messages -0.5 22 IO display -1.0 User Management 20 3:50 pm p2 / bar 4:00 pm 4:10 pm t2 / °C 1.0 Settings 0.8 Backup 90 p2: 0.40 bar 85 t2: 75.4 °C 80 0.6 75 70 0.4 65 0.2 60 0.0 3:50 pm 4:00 pm 55 4:10 pm f / Hz Load 60 50 Idle Operating state: Load f: 59 Hz 40 Oﬀ 30 3:50 pm |< < <> > >| Start: 02/10/2014 4:00 pm 4:10 pm 03:41:58 pm End: 02/10/2014 04:17:28 pm KAESER CONNECT Updates and data storage Simply connect a PC and the SIGMA CONTROL 2 with the LAN, then enter the SC2 address and password in the browser. Now you can view machine status, operating data, warning messages and graphical representations of pressure, temperature and speed in real time. Software updates and operatin

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g parameters can quickly be uploaded and transferred via the convenient SD card slot, thereby keeping service costs to an absolute minimum. Key operating data can also be stored on the SD card. 15 BBC–HBC series Usable flow rate: 0.59 to 93 m³/min Differential pressure: - Gauge pressure up to 1000 mbar - Vacuum up to 500 mbar 16 Rotary lobe blower packages for integration into existing systems Efficient, quiet, durable and versatile – whether used to convey bulk materials or as anti-heeling dampers on a container ship, KAESER blower packages are renowned worldwide for their dependable performance, no matter what the application may be. Small wonder, then, that they are so highly regarded by operators in every industry across the globe. IE3 energy-saving motors Sensors All KAESER blower packages are equipped with dependable, Premium Efficiency IE3 drive motors (IP55 protection, Insulation Class F). Their exceptional efficiency boosts the energy performance of the whole sys

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tem. A wide range of sensors and switches for monitoring pressure, temperature, speed, oil level and filters ensures dependable operation of the blower, whilst allowing remote monitoring and visualisation of the operating status. Minimal pulsations and quiet operation Automatic belt tensioning As pulsations from the conveying air can cause noise in the connected pipework in addition to noise from the machine itself, the targeted soundproofing measures on KAESER blowers are designed to minimise both types of sound emissions. Highly effective discharge silencers cover a wide frequency range so as to mitigate noise from pulsations in the conveying air. The pivoting motor base with tensioning spring ensures precision belt tensioning irrespective of motor weight, thereby providing optimum levels of transmission efficiency at all times. Consequently, this system reduces both maintenance and energy costs. 17 Premium blowers: HB-PI series – large and versatile KAESER’s HB-PI series

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rotary lobe blowers are the perfect choice for applications that require large air delivery volumes and maximum availability, such as in large water treatment plants or power stations. Flexible, durable and dependable, in combination with the rapid-response KAESER Service they guarantee uninterrupted operation at all times. Technical specifications: HB-PI series Usable flow rate: 55 to 160 m³/min Pressure differential: - Gauge pressure up to 1000 mbar - Vacuum up to 500 mbar IE3 energy-saving motors All KAESER blower packages are equipped with dependable, Premium Efficiency IE3 drive motors (IP55 protection, Insulation Class F). Medium-voltage motors can also be specified optionally. 18 Flexible connection to external switching technology HB-PI series packages are available prepared for connection to user-end switching technology on a project-specific basis, whether it be for operation at a fixed speed or via frequency converter. Medium-voltage versions are available upon request

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. Dependable belt drive Clever cooling air flow The pivoting motor base with tensioning spring ensures precision belt tensioning, thereby providing optimum levels of transmission efficiency at all times. This reduces wear whilst boosting reliability. Outstanding cooling performance is assured by the fact that the drive motor is equipped with a dedicated cooling air intake and ambient air from outside the sound enclosure is used as process air. This results in maximum efficiency, even under heavy load. 19 20 Impeller Magnetic bearings The impeller is constructed from a single piece of aircraftgrade aluminium. Its low mass enables swift acceleration and deceleration, resulting in highly dynamic control characteristics. This, in combination with a patented housing design, provides a broad control range at extremely high levels of efficiency. For best possible levels of unit availability, the magnetic bearings are oil-free and completely maintenance-free. The smart controller,

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with its integrated power failure protection system, recognises imbalances and sudden load shocks and compensates for them – rendering additional components such as buffer batteries and UPS devices unnecessary. Magnetic bearing turbo blowers – the undisputed masters of process air Efficient, reliable and flexible – PillAerator turbo blowers from KAESER are compact units developed specifically with aeration applications in mind. Equipped with contact-free magnetic bearings that require no lubrication, they guarantee a completely wear-free operation which renders oil and bearing changes unnecessary. Turbo blowers are used wherever process air is required in the low pressure range – such as wastewater treatment, aerobic fermentation and flue gas desulphurisation applications. Technical specifications: Flow rate: up to 267 m³/min Pressure differential: 0.3 to 1.3 bar Canned motor Cooling In a canned motor, rotor and stator are separated by a cylindrical tube. This allows an

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absolute hermetic sealing, which means that contaminants are reliably prevented from reaching the most sensitive parts of the machine. Cooling takes place via an internal water circuit, so as to ensure operating conditions are consistently optimised. In addition to achieving constant temperatures for the motor and frequency converter, this allows the control cabinet to remain hermetically sealed. By conveying away all accumulated exhaust heat via the cooling water, expensive exhaust air ducting is rendered unnecessary. 21 One-stop shop: Complete solutions from a renowned systems provider An operation’s blower air supply represents far more than the sum of the necessary equipment and components. By the same token, as a comprehensive compressed air and blower air systems provider, KAESER KOMPRESSOREN offers far more than just machines: From detailed demand analysis to the seamless integration of a blower station into an existing operation and life-long availability assurance throug

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h the rapidresponse KAESER AIR SERVICE. 22 Precision demand analysis (ADA 2) Fast, worldwide service Once your exact blower air demand has been determined by means of KAESER’s precision Air Demand Analysis (ADA), our experts use the KAESER Energy Saving System (KESS) to plan and design a solution that is specifically tailored to meet all your individual requirements, whilst providing the highest possible levels of efficiency and availability. Since even the highest quality machines require regular maintenance, KAESER AIR SERVICE, with its specially trained Service Technicians and advanced spare parts logistics, ensures continuous blower air availability across the globe. Detailed and expert planning Optimal climate control KAESER’s experts meticulously design every blower system to meet the specific needs of the customer. Needless to say, this includes planning the machine room ventilation and pipework, thereby ensuring peace of mind for users and project planners. KAESER

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’s expertise and components in relation to climate control are also essential elements in a holistic approach to blower station design: The availability of cool intake air increases efficiency levels and therefore saves energy. 23 KAESER blower accessories: For a wide range of applications Different applications often require a very specific air quality. For example, some bulk materials are sensitive to heat, whilst others may clump together if humidity levels become too high. Another potential problem is contamination of the process air by particles contained within the ambient air. For challenges such as these, KAESER is able to offer not only a wide range of cooler, dryer and filter models, but also the extensive experience of one of the world’s leading systems providers, in order to ensure a perfect match of all air production and treatment components. Furthermore, the SIGMA AIR MANAGER 4.0 enables the delivery volume of each blower station to be specifically tailored to mee

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t actual air demand, thereby ensuring maximum energy efficiency. 24 Coordination Heat recovery Depending on the versions in question, the SIGMA AIR MANAGER 4.0 compressed air management system can coordinate operation of 4, 8 or 16 blowers within a blower station so as to ensure an even load distribution between the units and thereby maximise energy efficiency. The heat exchanger can be integrated into the process lines to enable exceptional cooling of the process air, even at high ambient temperatures. The hot water produced in this way can be used for numerous heating purposes. Cooling Climate control Outdoor installation At an ambient temperature of +20 °C, the efficient ACA aftercooler is able to reduce the temperature of the compressed air to +30 °C without incurring any additional costs. Carefully matched components, such as weather protection screens, fans, inlet/discharge silencers and suitable air ducting, help to ensure and maintain optimum climatic conditions in

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the machine room at all times. At wastewater treatment plants, COMPACT blowers are often installed outdoors. Stainless steel rainproof covers and premium-quality, powder-coated enclosures ensure effective protection against the elements. 25 26 Versions for specialist applications Whether used on a silo vehicle as a mobile unloading station, for compression and/or for the conveying of media ranging from nitrogen to steam, KAESER blowers are ever-reliable and efficient OEM components. OMEGA B/PB – Corrosion resistant WVC series – Fine vacuum Blowers are available with rotors and block housings cast from chromium-nickel alloy and with special internal block sealing for processes such as the mechanical compression of water vapour in vacuum distillation of aqueous media. WVC series blocks with an intake capacity of up to 6,800 m³/h are ideal for fine-vacuum applications such as in pumping stations with a backing pump to boost their pumping speed. OMEGA PV – Rough vacuum

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OMEGA PN: Nitrogen conveying With an intake capacity of up to 120 m³/min for lowvacuum applications and a maximum of 900 mbar differential pressure, the OMEGA PV blower block is exceptionally robust and, with its ability to alternate between gauge pressure and vacuum by selective switching of the process lines, is perfectly suited for use with silo vehicles. Block cooling is provided by ambient air via pre-inlet ducts. For pneumatic conveying of bulk materials in a nitrogen atmosphere, leakages of any kind – including from the rotary lobe blower – must be kept to an absolute minimum. PN series blocks are available with a wear-free sliding ring seal on the drive shaft rotary transmission lead-through. Complete packages with OMEGA PN blocks are also available for nitrogen conveying applications. 27 28 Rotor and block machining Measurement and inspection Powder coating All rotors and blocks are precision machined to micron accuracy, so that the resulting surface quality rend

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ers wear-prone sealing coatings unnecessary. In order to maintain consistent product quality, we meticulously inspect every single block housing and rotor using precision measuring equipment, so as to ensure that it is manufactured to within permissible tolerances. The housings receive their high-quality scratch and corrosionresistant surface finish in an environmentally friendly, 180 °C powder-coating process. Advanced manufacture: Quality and performance A high level of vertical integration guarantees consistently high quality of both mechanical and electrical components and ensures seamless interplay between each individual part. All components are precisely matched to one another and meticulously documented. This enables traceability and guarantees a trouble-free supply of spare parts at all times. Block manufacture Final inspection Flexible production As with the rotors, the housing for every single KAESER rotary lobe blower block is manufactured in an advanced, climate-c