ROCKER-OIL-FREE-VACUUM-PUMP-300 FEATURES : No air pollution, maintenance free Rocker series pumps are driven by Piston, without the need of lubricant, regular oil changes and maintenance; with no oil pollution. Proteâ„¢ overflow protection Rocker series pumps are equipped with Proteâ„¢ filter cartridge which can prevent a large amount of liquid from being sucked into the pump by negligence. It can also filter particle and moisture to prolong the service life of pump. Thermal protection device Every motor of Rocker series pumps has a built-in thermal protection device to shut off the pump automatically when overheated and then resume working when the temperature cools down. Applications : Filtration for microbiology test Air sampling Suspended solid test Vacuum filtration

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