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TECHNOLOGY | MATERIALS HANDLING


Above: New SmartServices sensor kits from Conair can connect operating, performance and alarm data from non-computer controlled auxiliary equipment to the SmartServices platform


low. An optional variable-frequency drive is available to save energy and makes the new pump ideal for use in Conair Wave Conveying systems. “Until now, processors have had to accept


various trade-offs when selecting a central vacuum pump for their conveying application,” says Nick Paradiso, Product Manager – Conveying and Bulk Storage Products. “They have had to choose from three options: single or dual-stage regenerative pumps, positive-displacement pumps, and long- distance positive-displacement pumps. Single- stage regenerative pumps are quiet and inexpen- sive, but limited to short-distances, while dual-stage regen pumps handle moderate distanc- es, but are noisy and can be limited in throughput. Positive displacement (PD) pumps can offer greater power, but low-cost versions don’t handle long distances are very noisy. Long-distance pumps (LDP) are special positive displacement pumps that convey over long distances, at high rates, with low noise levels, but they can be quite expensive.” Paradiso adds that Conair’s new hybrid regenera- tive (HRG) pumps offer many of the best features of the other pump types, but at a price that is about 30% lower than a comparable LDP pump and in line with higher-end PD pump packages. He says that the key to the HRG’s power is in its tightly toleranced, three-stage impeller design, which smoothly cuts, captures, and compresses air with minimal draft or vibration. Similar to twin turbo- chargers on car engines, the vacuum becomes deeper and more powerful at each stage, allowing the HRG Series pumps to sustain vacuum levels up


58 INJECTION WORLD | September 2020


to 18 inches Hg and convey material up to 1,000 linear feet (305 m). The same hybrid regenerative design also makes the HRG Series pumps extremely quiet. Operating at 60 Hz, the average sound level ranges between 74 and 77 dBA, a comfortable range that does not require hearing protection. In many conveying applications, the new HRG pump also makes it possible to implement Conair’s Wave Conveying System at a substantially lower cost. Up to now, customers implementing Wave Conveying – Conair’s low-speed, dense-phase conveying technology – had to do so using the more costly LDP Series pump. But now, when equipped with an optional variable-speed drive motor, Paradiso says that new HRG Series pumps can support Wave Conveying in many situations. “Instead of conveying plastic materials in dilute-phase at speeds of 5,000 ft/min (1,524 m/ min) or more and creating dust, angel hair and equipment wear, the Wave Conveying System allows for gentle, low-speed conveying at speeds of 300-2,800 ft/min (91-853 m/min),” says Paradiso. “This gentle, dense-phase conveying method moves material in compact slugs, waves or streams that virtually eliminate material breakage, dust, and angel hair without reducing throughput capability.” According to Conair, the optional variable


frequency drive also saves energy by allowing the HRG pump to operate using only the amount of power necessary to achieve the desired material speed and throughput. In fact, an HRG pump, running in a Wave Conveying System, was shown to save as much as 50% on energy compared to similarly sized positive-displacement pump at equivalent throughput rates. Even in standard (non-Wave) operation, savings of up to 25% were observed.


Sensor kits The pumps are available in three different sizes: the HRG-10 has an 11.5 hp motor and is intended for 2.5 inch (64 mm) conveying lines; the HRG-15 (16.9 hp); and the HRG-30 (42.9 hp) service up to 3 inch (76 mm) line sizes. The new HRG pumps are also virtually maintenance free. The direct-drive system eliminates drive belts that wear and require constant adjustment. No lubrication is required. New SmartServices sensor kits from Conair now


make it possible to connect operating, perfor- mance and alarm data from non-computer con- trolled auxiliary equipment to the SmartServices platform, Conair’s cloud-based Industry 4.0 solution for auxiliary equipment monitoring, management and analysis. The user-installed sensor kits are now available for use not only with


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IMAGE: CONAIR


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