答：　國產(chǎn)羅茨風機**壓力可達1公斤，正常為0.8公斤。

　　進口羅茨鼓風機，一臺2.5公斤，日本生產(chǎn)30kw中等價位在17000元左右，和空氣壓縮機工作原理主要區(qū)別，風扇旋轉，壓縮機的活塞，羅茨鼓風機比壓縮機效率高，風量大，容易維護。

　　但不如壓縮機的壓力，低背壓的羅茨鼓風機通常被用來取代壓縮機，但這需要或高壓壓縮機。

　　羅茨風機壓力多少才正常?其實，這個問題的說法就欠妥。因為不同的工況不同的環(huán)境，使用的風機的壓力是不同的。羅茨風機壓力如何選擇，需要結合具體工況進行。下面，我們山東正和鼓風機分享一些相關知識，希望對大家有幫助。

　　1、羅茨風機壓力范圍

　　羅茨風機壓力范圍為：9.8kpa-200kpa，壓力超出這個范圍，很難達成，所以，在這個范圍內(nèi)的壓力都屬于羅茨鼓風機的壓力。

　　2、羅茨風機壓力指的是什么?

　　羅茨風機壓力是指風機的出口壓力。分為銘牌壓力和工作壓力。銘牌壓力是指風機工作在額定功率時出口能達到的持續(xù)**壓力，也羅茨風機額定壓力，會在羅茨風機設備銘牌參數(shù)上列出，這個是由羅茨風機廠家給出的。

　　羅茨風機的工作壓力指的是風機克服管道壓力的能力，能夠克服15kpa的壓力，羅茨風機的選型壓力就是15kpa;而這里的這個15kpa其實就是管道的壓力，如果不知道如何選擇壓力，那么可以讓工藝工程師計算一下管道的壓力有多少。得出羅茨風機的工作壓力。

　　3、選擇羅茨風機壓力時要盡量匹配

　　羅茨風機風機的壓力選擇小了，容易超壓出現(xiàn)故障，選擇的壓力大了，就會浪費電能，要盡量的做好壓力匹配，才是合適的選型。

　　4、羅茨鼓風機選型，知道污水池水深度怎么確定羅茨風機的壓力?

　　雖然管道有壓力損失，但壓力損失一般很小，而且通常曝氣頭不是在池底，而是略高于池底，粗略估算，一般地可以認為多少米水深就是多大壓力，公式的話，1米=9.8kpa，1米水深就是9.8KPa，也可以說是0.1kgf/cm2。2米水深就是這些數(shù)值乘以2，等于19.6kpa;相應的6米水深就乘以6，等于58.8KPa。總之按1米=9.8kpa計算一下就可以，然后根據(jù)水的立方數(shù)估算風機的風量。

　　Answer: the maximum pressure of domestic roots blower can reach 1kg, which is normally 0.8kg.

　　An imported roots blower, 2.5kg, 30kW produced in Japan, with a medium price of about 17000 yuan, is mainly different from the working principle of the air compressor. The fan rotates and the piston of the compressor. The roots blower is more efficient than the compressor, with large air volume and easy maintenance.

　　But not as good as the pressure of the compressor, the roots blower with low back pressure is usually used to replace the compressor, but this requires or high-pressure compressor.

　　What is the normal pressure of Roots blower? In fact, the statement on this issue is inappropriate. Because of different working conditions and different environments, the pressure of the fan used is different. How to select the pressure of Roots blower needs to be carried out in combination with specific working conditions. Now, we in Shandong are sharing some relevant knowledge with the blower, hoping to help you.

　　What is the maximum pressure of Roots blower?

　　1. Pressure range of Roots blower

　　The pressure range of Roots blower is 9.8kpa-200kpa. If the pressure exceeds this range, it is difficult to achieve. Therefore, the pressure within this range belongs to the pressure of Roots blower.

　　2. What does roots blower pressure mean?

　　Roots blower pressure refers to the outlet pressure of the blower. It is divided into nameplate pressure and working pressure. Nameplate pressure refers to the continuous maximum pressure that can be reached at the outlet when the fan operates at rated power, which is also the rated pressure of Roots blower. It will be listed on the nameplate parameters of Roots blower equipment, which is given by the roots blower manufacturer.

　　The working pressure of Roots blower refers to the ability of the blower to overcome the pipeline pressure, which can overcome the pressure of 15kpa. The selection pressure of Roots blower is 15kpa; The 15kpa here is actually the pressure of the pipeline. If you don't know how to select the pressure, you can ask the process engineer to calculate the pressure of the pipeline. Obtain the working pressure of Roots blower.

　　3. Try to match the pressure of Roots blower

　　If the pressure of Roots blower is small, it is easy to cause overpressure failure. If the pressure is large, it will waste electric energy. It is necessary to do a good job in pressure matching as much as possible, which is the appropriate type selection.

　　4. How to determine the pressure of Roots blower after knowing the depth of sewage pool?

　　Although there is pressure loss in the pipeline, the pressure loss is generally very small, and generally the aeration head is not at the bottom of the tank, but slightly higher than the bottom of the tank. According to rough estimation, it can generally be considered that the water depth is the pressure. According to the formula, 1 meter =9.8kpa, 1 meter water depth is 9.8kpa, or 0.1kgf/cm 2。 The water depth of 2m is multiplied by 2, which is equal to 19.6kpa; The corresponding water depth of 6 meters is multiplied by 6, which is equal to 58.8kpa. In a word, it is OK to calculate according to 1m =9.8kpa, and then estimate the air volume of the fan according to the cubic number of water.