classic | mobile
 

Search...

 

The argument for pneumatics in process industries
2nd Quarter 2011, Pneumatic systems & components


Pneumatic automation technology is perfect for many applications in process industries as it is robust, inexpensive and reliable. Compressed air can be easily transported, stored and is simple to control. These advantages enable pneumatics process control systems to perform fail to safe and speed control functions simply and easily.

With an average service life of more than 1 million cycles, pneumatic actuators will outlive most process valves. Even in harsh environments, generally found in process industries, with large temperature fluctuations, high levels of humidity, and abrasive substances. Pneumatic equipment is unaffected by temperatures between -5°C and +80°C, while special low-temperature variants can even operate down to -40°C and high-temperature variants up to +120°C. All stainless-steel component variants are extremely resistant to corrosion.

Festo pneumatic actuators and switch boxes are used to control butterfly valves on a water treatment plant sand filter
Festo pneumatic actuators and switch boxes are used to control butterfly valves on a water treatment plant sand filter

Simply uncomplicated

Pneumatics is an uncomplicated technology which is easy to install, and can be set up quickly during commissioning, saving time and money. Pneumatic drives have proved to be vibration-resistant and long-lasting. In contrast to electric drives, they consist of only a few components and are thus less susceptible to breakdowns. What is more, pneumatic drives are able to withstand continuous load and require no maintenance throughout their working life. There is no need for oil changes or lubrication top-ups.

Down with costs

Thanks to the lower costs, it is even worthwhile to automate manually operated valves retrospectively. Particularly in comparison with electric drive technology, the broad-based use of decentralised automation concepts with valve terminals results in considerable cost advantages. Savings of more than 50% are possible in some cases.

Energy-efficient solutions

As pneumatic drives are overload-tolerant and allow higher drive forces to be achieved simply by increasing the supply pressure, it is often possible to use smaller drives with lower weight than would be possible with electric drives. Provided that the tubing connections are leak-free and components are correctly dimensioned, the result is energy-efficient solutions. Pneumatic systems from Festo can deliver high forces of up to 47 500 N and torques of up to 8500 Nm.

Emphasis on safety

Pneumatic drives have three emergency functions in the event of a power failure – open, close and stop. They are ideal for use in areas with a potentially explosive atmosphere, in particular when explosion-proof valves, such as NAMUR pilot solenoid valves with appropriate coils, are used and the valves or valve terminals are located outside the explosion-hazard zone. In these cases, the pneumatic drives in the explosion-hazard zone are supplied with compressed air via tubing, while the electrical control components can be installed in a non-hazardous zone. Pneumatic drives are ATEX-approved as standard up to zone 1.

Overload tolerance

Deposits or baked-on residues of foreign material can lead to considerably higher breakaway forces on pneumatic drives. This happens particularly when valves are not actuated regularly or for long periods. The overload tolerance of pneumatic drives is a great advantage, as with pneumatics it is not a problem to increase the operating pressure and thus obtain higher forces. They will not suffer damage even if overloaded to the point where they come to a standstill and have large reserves of force for cases where high breakaway torque is required.

Competent and relevant advice

Festo experts can help with the calculation of compressed air consumption and the optimum dimensioning of compressed air supply networks; they can also provide assistance during the tendering phase if required. Customers can obtain everything they need from a single source and with just one part number. This ensures a simple ordering process and means that projects can be completed more quickly.

For more information contact Joanne Dexter, Festo, +27 (0)11 971 5560, marketing.za@festo.com, www.festo.co.za


Credit(s)
Supplied By: Festo
Tel: 08600 FESTO (33786)
Fax: 08794 FESTO (33786)
Email: sales.za@festo.com
www: www.festo.co.za
Share via email     Print this page  

Further reading:

  • Pneumatic systems as an energy efficient alternative
    1st Quarter 2018, Festo, Pneumatic systems & components
    Not so with pneumatic automation technology. It is robust, cost-effective and reliable because the compressed air is easy to transport, store and regulate. A comparison of pneumatic and electric actuator ...
  • Festo Didactic training: February to April 2018
    1st Quarter 2018, Festo, News & events
    The following courses are available from Festo Didactic       Pneumatics (1) Basic PN111:    Johannesburg: February 21-23, March 27-29, April 24-26    Durban: March 14-16, April 24-26    East London: February ...
  • Pneumatic energy saving solutions
    1st Quarter 2018, SMC Pneumatics South Africa, Pneumatic systems & components
    SMC Pneumatics recently launched a new version of the VEX3 power valve series, used to control actuators. The new modifications allow for improved cost savings and versatility by offering greater energy ...
  • Compressed air leak detection
    1st Quarter 2018, Artic Driers International , Pneumatic systems & components
    Compressed air costs around R0,13 per cubic metre. A typical 160 kW air compressor will consume around R1,3 million a year in power when providing a basic plant air service plan operating 24/7/365. In ...
  • Valve manifolds for food and packaging
    1st Quarter 2018, SMC Pneumatics South Africa, Pneumatic systems & components
    SMC recently launched a new addition to the SY series of valve manifolds targeted at the food and packing market. According to product manager, Ernst Smith, the new IP69K manifold is available as part ...
  • Pneumatic rodless cylinders in cleanroom applications
    1st Quarter 2018, Parker Hannifin (Africa), Pneumatic systems & components
    With industry subjected to increasing demands for product miniaturisation, a major challenge is manufacturing in cleanroom conditions. This applies especially to sectors such as pharmaceutical, medical, ...
  • Simple verification of modified ­atmosphere packaging
    1st Quarter 2018, Artic Driers International , Pneumatic systems & components
    Modified Atmosphere Packaging (MAP) is well established in the food industry and continues to gain in importance. MAP means that the natural ambient air in the package is replaced by a gas or gas mixture, ...
  • Supramotion in action
    4th Quarter 2017, Festo, This Week's Editor's Pick, Other technologies
    At the Hannover Messe 2017 trade fair, Festo showcased three exciting new concepts for the application of superconductor technology to industrial automation.
  • Versatile connection technology
    4th Quarter 2017, Festo, Pneumatic systems & components
    Thanks to its stable material properties, the PTFEN polytetrafluoroethylene tubing from Festo ensures greater process reliability under extreme ambient and operating conditions in the chemical, pharmaceutical, ...
  • Proportional regulators and valves
    4th Quarter 2017, Hydramatics Control Equipment, Pneumatic systems & components
    In a pneumatic system it can be more economical to implement proportional control rather than resorting to expensive electric motors and drives, especially when the application involves the accurate movement ...
  • Precise control and efficient cooling
    4th Quarter 2017, Rittal, Pneumatic systems & components
    The temperature of the cooling medium in machine tools needs to be controlled accurately so as to ensure high precision machining. The cooling system must also be energy-efficient, versatile, reliable ...
  • New range of retrofit inline filter elements
    4th Quarter 2017, Artic Driers International , Pneumatic systems & components
    Artic Driers recently launched a new range of retrofit replacement inline compressed air filter elements that are compatible with casings from a wide range of global manufacturers. Manufactured in the ...

 
 
         
Contact:
Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronic Buyers Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Other
Terms & conditions of use, including privacy policy
PAIA Manual





 

         
    classic | mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.