The data sheet mentions 0-70°C, but this is based on water. Zero simply because of ice creation, because ice has an expanding character and may destroy the pump. This is actually the cause for the storage concern here too. At a temperature of 70°C water begins to create air bubbles like in a cooking pot. These air bubbles will combine and disturb the pump due to its compressive behavior. The pump will then behave as it´s un-primed. So, if other liquids are used than water the temperature range may be different. For instance, with a cooling liquid that stays liquid below 0°C the pump will be still operational. Please note that we can’t guarantee these “enlarged” temperatures as we don’t know what liquid has whatever effects on the pump when the temperature changes that way.