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Definition and history of pumps

A device for conveying liquid or pressurizing liquid. A pump in a broad sense is a mechanism for conveying fluid or pressurizing it, including some of the machinery for conveying gases. The energy of the mechanical energy or other energy of...

Application of pumps in various fields

Performance range from the pump to see giant pump flow up to hundreds of thousands of cubic meters per hour, while the micro pump flow per hour in a few milliliters; pump from atmospheric pressure up to 19.61Mpa (200kgf/cm2); the lowest tem...

What is the average commonly used lamps and lanterns of volt

What is the safety voltage? The single-phase voltage for low voltage distribution network in China are based on ac 50 hz, 220 v, so, in addition to the need to use safe voltage power supply parts of lamps and lanterns, average commonly used...

LED fluorescent tube design and power supply power factor

In ac circuits, the phase difference between voltage and current () cosine is called power factor, with symbol cos said on numerical value, the power factor is the ratio of active power and apparent power, namely the cosine = P/S. The size...

LED fluorescent tube of drive power supply will be read

LED daylight lamp driver power is the power supply is converted into a certain voltage current to drive the LED voltage converter, normally: LED drive power supply input, including high voltage ac power frequency (mains), low voltage, high...