classic | mobile
 

Search...

SA Instrumentation & Control Buyers' Guide

Technews Industry Guide - IIoT 2018

Technews Industry Guide - Maintenance, Reliability & Asset Optimisation

 

Rodless pneumatic cylinders in hygienic applications
December 2017, Pneumatics & Hydraulics


While much of industry is subjected to increasing consumer demands for greater product miniaturisation, one of the principal challenges is faced by those having to manufacture in cleanroom conditions. This applies especially to sectors such as pharmaceutical, medical, food, and microelectronics. In these application areas, even the smallest amount of air pollution or contaminants can lead to high and costly reject rates.

Operators of cleanroom production facilities place great importance on air purity to align with standards and in so doing, underpin the quality, reliability and continuity of their products. In this respect, it is understandable that the selection of linear drives for use in these environments is made only after careful scrutiny. As a result, there is increasing need for linear drives that are suitable for use in all cleanroom classes.

Tasks and requirements

The principal requirement of cleanroom technology is to aid production without compromising air purity in the atmosphere. After all, the design of a cleanroom – structure, interior and technology (including linear drives) – is governed by the required air purity class. As a rule, cleanrooms are served by vacuum systems operating in suction mode, whereby the air is fed to one of the room’s boundary walls or ceiling (over the entire surface) in order to create a room-filling, unidirectional flow.

This ideal scenario only occurs if there is no place within the room where air can rest, and if there are no sources of interference positioned at right angles to the direction of flow. Moreover, relatively slow motions are required in order to avoid any additional whirling of particles and so avoid conversion from laminar to turbulent flow. This unwanted effect would not only increase energy requirements, but result in additional contamination of the products being manufactured.

Rodless pneumatic cylinders

Standard rodless pneumatic cylinders are normally deemed unsuitable for use in cleanroom environments as they emit tiny abrasive particles, fine lubricant particles and oil mist during operation. They can also stir up contaminant particles when operating at high speeds.

In terms of design, the majority of rodless pneumatic cylinders use an axially slotted cylinder barrel. Here, power transmission through the slot outwards to the carriage is form-fit. The slot is sealed on the inside by an internal stainless steel sealing strip along the cylinder barrel wall that prevents the penetration of contaminants.

Cleanroom-compatible rodless pneumatic cylinders differ from their standard counterparts in a number of ways. For instance, a partial vacuum is created via a vacuum line in the space between the inner and outer sealing band. This feature helps to reduce possible emissions, such as abrasive particles from the piston seals or slide elements, using suction to remove and feed them into downstream filters. Special vacuum connections at both ends of the barrel are used for this purpose. The vacuum generates a suction flow from the cylinder that ensures (assuming sufficient suction power is available) emissions are extracted and no particles are released into the cleanroom atmosphere.

Parker’s Origa System Plus (OSP-P) cleanroom cylinder offers this very functionality. It combines the efficiency of the Origa cylinder slot seal system with vacuum protection against progressive wear and contamination from sliding components. A partial vacuum drawn between the inner and outer sealing bands prevents emission into the clean room.

Benefits for cleanrooms

Cleanroom-compatible rodless pneumatic cylinders such as the OSP-P offer extensive customer benefits with a very good price/performance ratio that is achieved by demonstrating high cleanliness in practical applications. Specific performance attributes such excellent low-speed characteristics are delivered thanks to the use of special piston seals, and this is supported further by slip-free operation at low speeds.

Tests in a class 1 cleanroom provide an idea of the increased performance levels offered in comparison with standard versions. While a standard cylinder will show significant particle counts in operation at a velocity of 0,5 m/s, a cleanroom-compatible rodless pneumatic cylinder (featuring extraction and aspiration in the slot area between inner and outer sealing band) will statistically show no additional particles. Values measured in the direct vicinity of the cylinder will be equivalent to those of the ambient air in the cleanroom.

For more information contact Lisa de Beer, Parker Hannifin SA, +27 (0)11 961 0700, lisa.debeer@parker.com, www.parker.com/za


Credit(s)
Supplied By: Parker Hannifin Sales Company South
Tel: +27 11 961 0700
Fax: +27 11 392 7213
Email: parker.southafrica@parker.com
www: www.parker.com/za
Share via email     Share via LinkedIn   Print this page

Further reading:

  • Global partnerships for automotive support
    January 2019, Parker Hannifin Sales Company South, Motion Control & Drives
    Parker Hannifin is a global leader in motion control components and system solutions serving industrial, mobile and automotive markets. Specialising in hydraulics, pneumatics, electromechanics, fluid ...
  • Matching linear measurement performance to application needs
    January 2019, Parker Hannifin Sales Company South, Motion Control & Drives
    Almost all modern automated machines and systems require precise, reliable and cost-effective linear measurement. And although this need increases in line with demands for greater efficiency, speed and ...
  • Ham-Let moves into the future with smart valves
    December 2018, Fluid Systems Africa, Pneumatics & Hydraulics
    The Ham-Let Group has manufactured high-quality instrumentation valves, fittings and auxiliary products for fluid systems in a variety of markets since 1950, and has now launched its first smart valve ...
  • Intelligent valve sensor for pneumatic applications
    December 2018, ifm Electronic RSA, Pneumatics & Hydraulics
    The intelligent valve sensor for pneumatic quarter-turn actuators from ifm electronic features 360° position monitoring to allow precise and continuous scrutiny of the valve condition. Problems such as ...
  • BMG fluid technology services
    November 2018, Bearing Man Group t/a BMG, Pneumatics & Hydraulics
    BMG’s fluid technology services include solutions for hydraulics and pneumatics, lubrication, fuel and industrial filtration systems, hydraulic hose and fittings, as well as instrumentation, pumps and ...
  • Using IIoT analytics to build customer solutions
    October 2018, Parker Hannifin Sales Company South, IT in Manufacturing
    Parker’s Voice of the Machine platform contextualises the data collected from machines.
  • Vacuum generator operates without compressed air
    October 2018, Tectra Automation, Pneumatics & Hydraulics
    The electrical vacuum generator ECBP from J. Schmalz is ideal for handling airtight and slightly porous workpieces. It features an integrated speed control, which regulates the power of the pump to suit ...
  • Smart factory technology to power the Industry 4.0 revolution
    September 2018, Parker Hannifin Sales Company South, System Integration & Control Systems Design
    Many areas of the industrial sector are undergoing transformation, as robots, vehicles and control systems connect to the Internet. This networking trend is enabling unprecedented levels of automation, ...
  • Red Dot award for Parker
    September 2018, Parker Hannifin Sales Company South, News
    Parker Hannifin has been honoured with the ‘Red Dot Award: Product Design 2018’ for its integrated drying and filtration system OFAS (oil free air system). The German Red Dot Award is recognised as a ...
  • Careful selection unlocks the potential of smart sensors
    August 2018, Parker Hannifin Sales Company South, Sensors & Transducers
    Smart sensors are facilitating the manufacturing sector’s shift to Industry 4.0. The latest smart sensors are able to share information with the controller via technologies such as IO-Link. They can also ...
  • Intelligent production enables minimised downtime and optimal efficiency
    Technews Industry Guide: Industrial Internet of Things & Industry 4.0, Parker Hannifin Sales Company South, Fieldbus & Industrial Networking
    IO-Link supports predictive maintenance strategy with flexibility in the Industry 4.0 era.
  • Variable speed drives in Europe’s largest underground carpark
    July 2018, Parker Hannifin Sales Company South, IS & Ex
    Parker Hannifin has recently completed a project to replace all the motors supporting the operation of ventilation systems in Europe’s largest underground carpark, situated under La Défense, Paris, with ...

 
 
         
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.