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OEM APPLICATION NOTE Pneumatics Clean-design valves ensure sanitation Clean-design pneumatic valve terminals and actuators offer a high level of hygiene, as well as low maintenance. Abbey Lewis, Online Editor T wo Festo components help make Elopak’s container loading system both hygienic and easy-to-maintain. Lauri Nurminen, sales manager materials handling with Elopak, outlined the benefits of the Festo CDVI Clean Design Valve Terminals and CDN Clean-Design Cylinders at a speech to editors from around the world who attended a press briefing at Festo’s German headquarters this past December. The materials handling division of Elopak, located in Finland and Norway, manufactures its container loaders mostly for high-volume or quick-turnover products such as fresh milk. Mounted on rollers, containers carry 160 liters and have a capacity varying from 5,000 to 13,000 units/hour. A complex series of actions unfolds as the Elopak system does its thing. First, a group of bottles is pushed forward on to a slotted table of the container loader. A loading plate is pushed into the trolley. A group pusher front plate moves the group onto the roll container shelf. The full trolley elevator moves the trolley downward to the next shelf level for loading. This is repeated four times to fully load one trolley. Three of Festo’s pneumatic valve terminals are on the machine: one is placed close to the trolley-handling section of machine, one is near the full trolley out-pusher, and the other is above the bottle grouping section of the machine. The machine is controlled by a Mitsubishi Q-Series PLC, which is connected directly to the valve terminals. Elopak also uses Mitsubishi’s CC-link network to communicate between machines and the line control system. Valves control various cylinders in the machine. • Pusher plates move up and down with pneumatics. • Bottle guides and shelf knock down units are pneumatically driven at bottle infeed. • Trolley locks and guide plates on the out-feeding unit are pneumatic. • Safety doors for trolley in-feed and outfeed have cylinders driving them. • CIP valves are also pneumatically controlled. The Clean-Design Valve Terminals are ideal for wet environments such as a dairy or other beverage-filling applications, Nurminen said. They can even operate without protective stainless-steel control cabinets. This means that they can be mounted directly to the machine, helping save space in the control cabinet. The Clean-Design cylinders require minimal cleaning for maximum functionality. They are enclosed on all sides to avoid dirt and dust collection on the cylinders. They’re also easy to maintain. The cylinders are housed in anodized aluminum, providing enhanced corrosion resistance. Festo AG & Co. KG, Phone: 631/404-3200 www.festo.com Elopak, Phone: 011/47.31.27.10.00 www.elopak.com Both pneumatic cylinders (above) and valve terminals (top) feature clean-design principles that enhance hygiene and simplify maintenance. Mitsubishi Electronics, Phone: 714/220-2500 www.mitsubishielectric.com Copyright 2005 Summit Publishing, Inc. Reprinted with permission from the March 2005 issue of Packaging World. For more information about reprints from Packaging World, contact PARS International Corp. at (212) 221-9595. Individual “Clean Design” Valve, Type CDSV Easy-to-clean and corrosion resistant The new individual Clean Design valve – simply a clean solution... Designed to address the needs of specific environmental challenges commonly found in food handling and processing and other applications requiring easy-to-clean products. Easy to clean In accordance with hygienic design standards (DIN ISO 14159), the CDSV have no sharp edges or small corners where dirt can accumulate. The CDSV is a compact, space-saving design available in four valve functions: – 5/2-way valve, single solenoid Technical data – 5/2-way valve, double solenoid Design – 5/3-way valve, exhausted, Mounting position any pressurized or closed in mid-position Manual override non-detenting – 2 x 3/2-way valve, single Corrosion resistance solenoid, 2 x normally closed or classification CRC3 to FN 940 070 * normally open or 1 x normally Dimensions 207/34/67.6 in mm (H/W/D) open, 1 x normally closed Pneumatic data piston spool valve Medium compressed air, filtered, lubricated or The CDSV valves can be used with Grade of filtration 40 µm a CDVI valve terminal in the 1st Operating temperature –5 ... +50 °C grid by means of a sub-base. Standard nominal flow rate max. 650 l/min unlubricated Adaptable Operating pressure: Quicker to install – 5/2-, 5/3-way valves –0.9 ... 10 bar With a ready-to-install prefitted – 2 x 3/2-way valves 3 ... 10 bar cable – the Clean Design valves can pilot pressure 3 ... 6 bar be used without a stainless steel Pneumatic connections Gx ''” , M5 control cabinet. Electrical data Operating voltage DC 24 V, ±10 % Clean Design at the point of Power consumption 1.5 W per solenoid coil (with LED) action Duty cycle 100 % CDSV supplies compressed air to Protection class to decentralized upstream machine EN 60 529 parts and for other applications, while delivering faster cycles and lower air consumption. IP65/67 fully assembled *CRC3: Corrosion resistance class to Festo standard 940 070 (Components requiring higher corrosion resistance. External visible parts in direct contact with industrial atmospheres or media such as solvents and cleaning agents, with a predominantly functional requirement for the surface). For ordering and product assistance, or to find your nearest Festo Distributor in the USA, Call: Fax: E-mail: Visit: 1.800.99.FESTO 1.800.96.FESTO [email protected] www.festo.com/us