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◠micro-pump purchase instructions: 1, select special attention: ①Please prioritize the 24V voltage specifications, the same price, better quality. ② When ordering please indicate the voltage, such as, FAC4002-24V. 2, low electromagnetic interference type: If the system is equipped with sophisticated circuits (such as single-chip microcomputer) to control the operation of the micro-pump, please use the FAL series with brushless motor. 3, weight: about 380 grams. 4, miniature pump suction port, exhaust port can be with a large load, or even completely blocked, are normal work. 5, micro-pump working medium Micro-pump extracted gas must be non-corrosive, non-oil, but allows rich water vapor. The series of products by affordable media gas temperature is divided into two types of medium temperature and medium temperature. Such as the need for "high temperature medium type" products, please specify when ordering, such as: FAC4002-24V (high temperature medium type); did not paste "high temperature medium type" label products are room temperature medium type. 6, the definition: When the pump exhaust port is completely exposed to the atmosphere, the exhaust port of the pump directly connected with the pressure gauge, as the pump continues to pressure, the pressure value continues to rise, and finally stabilize a value, the value of As the pump's "maximum output pressure." 7, for other voltage and flow specifications of the product, you can contact custom. ◠Miniature pump instructions: 1, miniature pump working environment Ambient temperature: 0 ~ 40 ℃ (no condensation), micro-pump should not be exposed to the sun outdoors, should work in a clean environment. Environmental relative humidity: ≤ 75%. 2, noise and muffler (optional) when there is a large air flow through the pump when the noise is large, near the vacuum pumping noise will be greatly reduced. When the muffler connected to the gas system, it will have some effect. According to the specific circumstances of the gas system and conditions of use, there are differences in the muffler effect.