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4. VACUUM TECHNOLOGY IN THE AUTOMOTIVE INDUSTRYTraining phases: 1. BASIC VACUUM TECHNOLOGY Training phases: Introduction to vacuum technology The role played by vacuum technology in pursuit of improved productivity and profitability The role played by vacuum technology in pursuit of improved productivity and profitability Design and function of vacuum systems for handling metal sheets, glass and plastic parts Minimizing cycle times Integration of vacuum Evaluation of technical solutions Various types of vacuum systems Dimensioning vacuum systems Control systems Optimal use of energy 5....

WHAT IS VACUUM? When using the terms ٔvacuum, Ԕnegativepressure, Ԕsuction, etc., we mean a pressure that is lower than the atmospheric pressure, which is thepressure of the weight of the air above us. At sealevel it usually is 1,013 mbar = 101.3 kPa. 1 Pa equals 1 N/m > 2 , which means that a column of airwith a cross-sectional area of 1 m > PVAԙ 2 presses on thesurface of the earth with a force of around 100,000N. By reducing the pressure in a closedspace the atmospheric pressure becomes apotential energy source. A vacuum cleaner does not suck. Air and dust arepressed into the vacuum...

Expressions Units -kPabar Under pressure Absolute pressure % vacuum (% of vacuum) inHg mm H > 2 OmmHgtorr Negative pressure hPa mbar > Blowers or low vacuum0Ԗ20 -kPaFor ventilation, cooling, vacuum cleaning, ...Industrial vacuum2099 -kPaFor picking, holding, automation, ... Process vacuum99 -kPa ֖Deep vacuum for laboratories, manufacturing of microchips, plating, ... > Specifications subject to change without notice. >

ENERGY NEEDS FOR DIFFERENT VACUUM LEVELS The energy required to create vacuum increasesasymptotically towards infinity with increasedvacuum. To obtain optimum energy exchange it is very important to choose the least possible vacuum.To illustrate the energy needs, a cylinder with apiston (piston pump) is suitable.According to Boyleْs Law the pressure (p) in a gas isinversely proportional to its volume (V) at constanttemperature: P > PVA 1 x V > 1 = P > 2 x V > 2 This means that increased volume gives a lower pressure. By pulling the piston slowly, the distance extendedwill show the increased...

Fans Advantages Disadvantages Centrifugal blowerFew moving partsLarge suction volumes StrongLow maximum vacuumSlow start-up and long stop time High noise levelRegenerative blowerFew moving partsLarge suction volumesLow energy consumptionLow maximum vacuumSlow start-up and long stop timeHigh noise level Displacement pumps Advantages Disadvantages Piston pumpRelatively low priceHigh heat emissionLow maximum vacuumMembrane pumpFew moving partsCompact Low priceSmall suction volumes Vane pumpHigh vacuum and flowRelatively low noise levelSensitive to contaminationRelatively high priceHigh service...

Compressed air-driven ejector pumps Advantages Disadvantages Single-stage ejectorLow priceNo heat emission CompactHigh noise levelGives either high flow or high vacuumPoor efficiencyMulti-stage ejectorHigh efficiencyLow energy consumptionHigh reliabilityLow noise level No heat emissionCOAXٮ technologyHigh efficiencyLow energy consumptionHigh reliabilityLow noise levelNo heat emissionOperates even at low feed pressure Integrated featuresModularly builtEasy to supplement and upgrade later onEasy to clean > PVA Specifications subject to change without notice. >

When making a vacuum system/lifting device there are several different methods to increase safety andreliability. To give efficient operation and good economy it is important that the designed system is made for aspecific application. In addition to the choice of suction cups with attachments, the type and size of vacuumpumps, accessories, safety level and type of system must also be decided upon. SEALEDSYSTEMS For sealed systems the capacity of the pump isdetermined by how fast the system can be evacuated to a certain vacuum level. This capacity iscalled the evacuation time of the pump and...

WHY A DECENTRALIZED VACUUM SYSTEM? The impact of losses in a centralized vacuum systemdue to tubing, bends, fittings, valves, filters, etc., issubstantial and has to be compensated by increasing the size of the vacuum pump. Adecentralized system with the vacuum pump/cartridge placed right at the suction cup eliminatesthe risk for losses in the vacuum piping and theneed for expensive oversized components.Furthermore, the response time will be reduced substantially without unnecessary volume to beevacuated, and each cup is independent. A pressureloss in one cup will not affect the others. 1....

Special safety requirements govern manual vacuum lifting devices (SS 765 5801 in Sweden). When designingthese devices, allow for at least a double safety margin on the lifting force at the designated vacuum level. Therelease is blocked during lifts so that the load is not released by mistake. Further safety is achieved by usingsound or light signals that give a warning if the vacuum level falls below a certain set value. VACUUM TANK As a protection against loss of vacuum, for example,if a compressed air hose would break, a non-returnvalve is normally fitted near the pump. A vacuumtank...

HOW DOES A SUCTION CUP WORK? A suction cup adheres to a surface as thesurrounding pressure (atmospheric pressure) is higher than the pressure between the suction cupand the surface. To create the low pressure in thesuction cup it is connected to a vacuum pump. The lower the pressure (higher vacuum), the greater theforce on the suction cup. ADVANTAGES AND LIMITATIONS OF THE SUCTION CUP SIZING SUCTION CUPS Material handling with suction cups is a simple, inexpensive and reliable technique. It is therefore asolution worth considering before going over to morecomplicated methods. Suction cups...

PVA General works air Vacuum pumps from PIAB(ISO 8573-1 5 4 3) Control and instrument air Valves, switches, vacuum mgmt, ES(ISO 8573-1 4 4 3) NB! In combined products where an instrument uses the air from a pump, the inlet air must fulfil the recommendation for control and instrument air. > ISO 8573-1 A. Solid particles B. Humidity C. Overall oil content Max number of particles per m > 3 with size d ( ٵ m) Pressure dew point Classd ≤ 0.10.1 3 (X=liquid water in g/m > 3 )mg/m > 3 As specified by user1՗10010ח ≤ -70 C Тɤ 0.01 2 100000 1000 10 ח עɤ -40 C Тɤ 0.13ח10000500ח ≤ -20 C Тɤ 1.0 4 ח...