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SMC has unveiled a range of energy-saving components specifically developed for handling or transfer applications.

Series ZL112/212 multistage ejectors are designed with a triple-stage diffuser that effectively increases the suction flow rate by 250 per cent when compared with a conventional single-stage ejector.

Due to its design, the amount of compressed air required to generate this increased vacuum pressure is reduced by 20 per cent.

Series ZL 112, the smaller of the two models, is suitable for applications requiring a maximum suction flow rate of 100l/min (ANR) and requires an air supply of 63l/min (ANR).

With one-touch fittings, easy piping is ensured and, in addition to the standard options featured on both the ZL models, the 112 multistage ejector can also be ordered with a supply/release valve.

Series ZL 212 uses the same three-stage diffuser design, but combines two stacked integrated diffusers in one single compact unit, which effectively doubles the operational performance of the ZL112.

Available with a range of vacuum sensor options, including a digital vacuum pressure switch, both the ZL112 and 212 models can be specified with a port exhaust or with a built-in silencer.

‘Recently we installed a ZL112 ejector to a vacuum packaging application for a leading soft drinks manufacturer who was using a number of ejectors that were producing far more vacuum than was necessary to transport internal carton packaging,’ said Sebastian Fabio Agnello, development manager of SMC’s European Energy Saving Programme.

‘By replacing their existing ejectors with our multistage technology ZL112, we immediately saved our customer several thousand Euros a year in wasted energy costs and their investment on this energy-saving initiative was recovered in just 12 weeks,’ he continued.

‘By replacing a single-stage ejector with one of our multistage technology ejectors, the air consumption required for vacuum generation is normally reduced by around 60 per cent, which enables vacuum users to consider the benefits of even retro-fitting their machines as the savings are considerable as the payback on this investment is relatively short,’ Agnello said.

Developed initially for the semiconductor market, the Series ZP2V vacuum saving valves are designed to shut down the suction line when any leakage is detected from the vacuum pad not being fully aligned with the workpiece, or even when the workpiece is simply missing.

By effectively stopping the air suction when the system recognises any irregularities, the energy used in making this vacuum is kept to an absolute minimum.

Without the need for a workpiece detection mechanism – which often use mechanical moving parts – surface scratches or marks on the work piece are eliminated.

Ideal for use as a standalone single vacuum pad or for multiple vacuum pad applications where the vacuum pressure loss is reduced to a minimum and the workpiece remains held by the rest of the operating pads, ZP2V users will also save money and time by eliminating the need for expensive sensors or a programmable logic controller (PLC).

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