答：　国产罗茨风机**压力可达1公斤，正常为0.8公斤。

　　进口罗茨鼓风机，一台2.5公斤，日本生产30kw中等价位在17000元左右，和空气压缩机工作原理主要区别，风扇旋转，压缩机的活塞，罗茨鼓风机比压缩机效率高，风量大，容易维护。

　　但不如压缩机的压力，低背压的罗茨鼓风机通常被用来取代压缩机，但这需要或高压压缩机。

　　罗茨风机压力多少才正常?其实，这个问题的说法就欠妥。因为不同的工况不同的环境，使用的风机的压力是不同的。罗茨风机压力如何选择，需要结合具体工况进行。下面，我们山东正和鼓风机分享一些相关知识，希望对大家有帮助。

　　1、罗茨风机压力范围

　　罗茨风机压力范围为：9.8kpa-200kpa，压力超出这个范围，很难达成，所以，在这个范围内的压力都属于罗茨鼓风机的压力。

　　2、罗茨风机压力指的是什么?

　　罗茨风机压力是指风机的出口压力。分为铭牌压力和工作压力。铭牌压力是指风机工作在额定功率时出口能达到的持续**压力，也罗茨风机额定压力，会在罗茨风机设备铭牌参数上列出，这个是由罗茨风机厂家给出的。

　　罗茨风机的工作压力指的是风机克服管道压力的能力，能够克服15kpa的压力，罗茨风机的选型压力就是15kpa;而这里的这个15kpa其实就是管道的压力，如果不知道如何选择压力，那么可以让工艺工程师计算一下管道的压力有多少。得出罗茨风机的工作压力。

　　3、选择罗茨风机压力时要尽量匹配

　　罗茨风机风机的压力选择小了，容易超压出现故障，选择的压力大了，就会浪费电能，要尽量的做好压力匹配，才是合适的选型。

　　4、罗茨鼓风机选型，知道污水池水深度怎么确定罗茨风机的压力?

　　虽然管道有压力损失，但压力损失一般很小，而且通常曝气头不是在池底，而是略高于池底，粗略估算，一般地可以认为多少米水深就是多大压力，公式的话，1米=9.8kpa，1米水深就是9.8KPa，也可以说是0.1kgf/cm²。2米水深就是这些数值乘以2，等于19.6kpa;相应的6米水深就乘以6，等于58.8KPa。总之按1米=9.8kpa计算一下就可以，然后根据水的立方数估算风机的风量。

　　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.