First, the type of centrifugal pump according to the nature of the liquid can be transported can be divided into: (1) pumps (B type, D type, sh type) used to transport water and physical and chemical properties similar to water cleaning fluid. (2) corrosion-resistant pump (F-type) used to transport acid, alkali and other corrosive liquids. (3) Oil pump (Y type) is used to transport petroleum products. Second, the choice of centrifugal pump (1) according to the nature of the liquid being transported and operating conditions to determine the type; (2) according to the flow (usually by the production tasks) and calculate the pressure head required in the pipeline to determine the pump model Or product catalog); (3) If the viscosity and density of the liquid to be transported differ greatly from that of water, the characteristic parameters of the pump should be calculated: flow rate, pressure head and shaft power. When choosing a centrifugal pump, there may be several types of pumps that meet the requirements of operating in the optimum range at the same time. In this case, you can determine the operating points of each pump, compare the efficiency of the operating point, the preferred choice. Centrifugal pump is characterized by liquid delivery capacity, uniform flow, but the resulting pressure is not high, and the pressure head with the flow changes.

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You are suggested to consider the below things when buying LED bulb.

1. Equivalent Wattage

While lumens are the new standard, it helps to have an easily recognizable guide. Comparing an LED bulb to an incandescent will give you a rough estimate of just how well it will light a room. As a very ballpark figure for LED wattages, 1/4 or 1/5 the incandescent wattage value is usually close to what you need.

2.Lumens

Lumens directly measure just how much light the bulb gives out in total. On average, a 60-watt incandescent shines at 800 lumens, with roughly 50-100 lumens of difference above or below. The variance depends on manufacturer and age of the lamp. LEDs are directly rated for their max lumen rating and last much longer without dimming of the bulb.

3.Color Temperature

Your guide to how the light itself will look. Lower values are warmer, with 2700-3000K being a more incandescent "warm white" while higher temperatures like 5000K will deliver a very harsh "stark white" light. Our Lighting Guide lets you select a color temperature and see how it transforms a kitchen.

4.Driver Content

Because of their design, LEDs do not typically run on AC voltage. Many LEDs require some form of driver to convert the voltage from AC to DC for proper operation. The majority of socket-based LED lamps are self-driven, but you should always check before buying to make sure that you buy both an LED and a driver at the same time if it isn't self-driven.

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