Chemical Technology September 2015

Petrochemicals COVER STORY

Powder feed line

Tank bottom valve and manual shut-off valve, both with electrical position indicator LSR

easier to clean and providing more stringent security where hygienic conditions are important. The butterfly valves have undergone rigorous testing at the GEMÜ testing laboratory, based in Germany, which is able to test to the most varied of customised cleaning and sterilisa- tion requirements such as CIP/SIP, as well as conducting validation and quality testing. Temperature and cycle simu- lation tests are also conducted for warranty specifications. The lifespan and reliability of elastomeric seated butterfly valves is largely dependent on the choice of valve liner; this is why the white NBR liner was utilised in the Eastern Cape chocolate plant as it complies with all global hygiene stan- dards, including the UK’s Water Regulatory Advisory Scheme (WRAS). In addition it offers a long working life span. Furthermore, GEMÜ supplies solutions for filling, cleaning, mixing, separating, sterilising, autoclaving and pasteurising machines and plant, with all design conforming to the EU framework regulation 1935/2004. Further information is available from: Claudio Darpin, Manag- ing Director, GEMÜ Valves Africa on tel: +27 11 462 7795 or email: Claudio.darpin@gemue.co.za and Chris Frauenstein, Managing Director, Instruments4You on tel: +41 451 0614 or email: chris@instruments4you.co.za z

hygiene and sanitation standards,” explained Darpin. Chris Frauenstein, Managing Director of Instruments4You commented: “When chocolate ismanufactured and becomes a liquid state, then all pipelines need to be heated to keep product fromdrying and becoming like concrete. This is done by passing warm water through jacketed pipework. GEMÜ valves have been used to shorten the dead space between flanges (where they do not have the space to jacket the pipework)”. Technical data The GEMÜ Victoria butterfly valves range in size from DN 25-DN 600 and offer manual, and pneumatically operated options with traditional Normally Closed, Normally Open and Double Acting action. A complete range of measurement and control systems, designed by GEMÜ to suit the exact requirements of valves to be operated as ON/OFF or control valves, complements the scope of products which GEMÜ is offering to industrial customers. Maximumoperatingpressures of 16bar andoperating tem- peratures of up to150 ºC (depending on version andmaterials used) can be matched by using the seal material accordingly. Most commonly materials used are EPDM, NBR and FPM. The mirror polished disc surface of the valve offers a high surface quality which prevents particle build-up making it

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Chemical Technology • September 2015