答：罗茨风机选购时需要的基本参数有一下几种：

　　1、风压参数

　　用过罗茨风机或采购过罗茨风机的朋友都知道，罗茨风机选型必不可少的参数之一就是压力(风压)参数了，也有很多客户来询罗茨风机的时候就会说你们有没有**kpa的风机，这些客户都是曾经用过风机的，或者刚设计出参数的一些客户.小编就不多说了

　　2、风量(流量)参数

　　流量(风量)参数是罗茨风机选型另外一个比较重要的参数，当然选型的时候必须知道压力参数跟风量参数，基本上就可以进行选型了，能够确定基本风机型号是多少了。所以，以上两个参数，压力和风量必须要有准确的数据，关系到后期风机适不适合用在工况现场。

　　3、电机功率

　　电机功率是相配套的参数，风机需要电机带动才能进行正常的运行，如果风机在根据压力和风量的情况下确定了，那么电机功率也就基本确定了，这是标准选型样本上所定的，当然不排除有一小部分客户采用非标电机，电机功率可能大可能小，但是能够带动机头工作，但是在节能或者其他方面有些不足的地方。有很多用过的客户来询风机的时候都会问：有没有**kw的风机，或者**kw风机多少钱，这些客户有一部分是之前用过风机，有一部分是咨询其他用过风机的。

　　4、转速

　　有些客户在询风机的时候，对转速的参数也是有要求的，其实风机的转速影响到风量，为何对转速有要求呢?除了行业方面的原因以外，虽然不同转速能够满足同一个工况，但是，现在风机的时候应当尽量选择转速相匹配的，转速越高风机的磨损越快，使用寿命就越短。

　　5、特殊密封特殊要求也

　　会影响到我们进行选型，如输送沼气、煤气等特殊气体，输送此类气体需要进行特殊密封，所以，如果您输送此类气体，罗茨鼓风机在制造时会有一定的不同，密封方式方面会有一定的小差异。如活塞环密封、N4机械密封、H抽气密封、K单机械密封、G型充氮气密封等，不同的密封方式造价也不同，所以，如您对此有一定的要求，罗茨鼓风机的结构形式上又会出现一定的差异化。

　　6、噪音值

　　这个参数主要针对特定的用户，多见的就是选用回转风机的客户，本身回转风机的噪音值就会比罗茨风机的噪音值要小很多，因为有些特殊行业需要污水处理，例如：医院，大家都知道医院的环境就是需要肃静，所以，噪音值这个参数就变得非常重要了。一般采购的客户对于噪音值并没有什么要求，大多数用于工厂，工厂环境本身噪音偏多，罗茨鼓风机的特性就是：风量范围广、压力范围广、性价比高，但是就是噪音不太好解决。

　　7、品牌

　　其实有很多客户来询风机的时候，都会有指定品牌风机，或者之前用过**品牌的风机，现在想换一个厂家，所以，有时品牌也会成为一个选型的参数，如果您在网上通过其他品牌联系到我们，请事先告知我们您需要指定品牌，如回转风机，可以只提供风机型号我们就可以帮您选出适合您的风机，其他罗茨风机，提供型号的同时，您可能需要提供(电机功率、风量、压力)其中;两个参数。我们才能给您选出准确的风机，让您进行作对比。

　　8、没有参数怎么办?

　　大多数污水处理、水池养殖、蒸汽压缩的没有用过的客户都是没有具体的参数，怎么办呢?

　　(1)水产养殖客户可以提供(养殖面积及水深)，就可以帮助我们推算出压力及流量参数。

　　(2)污水处理曝气用风机，可以提供水池的(长、宽、高[水深])分别是多少，这样也可以推算出流量压力值。

　　(3)气力输送用的客户，可提供(垂直高度，输送处理量，输送距离)等参数，推算出流量及压力参数。(4)废水利用客户可以提供给厂家(蒸发处理量、进出口温度)等，也可以来选型

　　以上内容便是罗茨风机选购中用到的基本参数了，我们常用到的就是流量、压力、功率这三个参数，而非全部用到，根据我们的了解，普通的三叶型罗茨鼓风机用的*多，其次便是二叶型、双级串联型、密集型还有特殊密封型。

       上海瑞柘环保设备集团有限公司生产销售罗茨鼓风机已15年了！产品在磕磕绊绊中成长至今，已经成为国内为数不多知名的中小工业风机厂家！公司生产的罗茨鼓风机、罗茨真空泵在气力输送、污水处理、水生态治理中应用广泛。同时公司的环形高压鼓风机在食品包装、水产增氧等场景中获得了客户的一致认可！

　　Answer: the following basic parameters are required for the purchase of Roots blower:

　　1. Wind pressure parameters

　　Friends who have used roots fans or purchased roots fans know that one of the essential parameters for Roots fan selection is the pressure (wind pressure) parameter. When many customers ask about roots fans, they will say whether you have * * kPa fans. These customers have used fans or just designed parameters Xiaobian won't say more

　　2. Air volume (flow) parameters

　　The flow (air volume) parameter is another important parameter for Roots fan selection. Of course, the pressure parameter and air volume parameter must be known during the selection. Basically, the selection can be carried out, and the basic fan model can be determined. Therefore, the above two parameters, pressure and air volume, must have accurate data, which is related to the suitability of the fan in the later stage for use in the working condition site.

　　3. Motor power

　　The motor power is a matching parameter. The fan can operate normally only when it is driven by the motor. If the fan is determined according to the pressure and air volume, the motor power is basically determined. This is set in the standard model selection sample. Of course, it does not rule out that a small number of customers use non-standard motors. The motor power may be large or small, but it can drive the head to work, But there are some deficiencies in energy conservation or other aspects. Many used customers will ask whether they have * * kW fans or how much they charge when they ask for fans. Some of these customers have used fans before, and some have consulted other used fans.

　　4. Rotational speed

　　When some customers ask about fans, they also have requirements for speed parameters. In fact, the speed of fans affects the air volume. Why do they have requirements for speed? In addition to industrial reasons, although different rotating speeds can meet the same working condition, the fan should be selected to match the rotating speed as much as possible. The higher the rotating speed, the faster the wear of the fan, and the shorter the service life.

　　5. Special requirements for special seals

　　It will affect our model selection, such as the transportation of special gases such as biogas and coal gas. The transportation of such gases requires special sealing. Therefore, if you transport such gases, the roots blower will be different in manufacturing and there will be some small differences in sealing methods. For example, piston ring seal, N4 mechanical seal, H extraction seal, K single mechanical seal, G-type nitrogen filled seal, etc., the cost of different sealing methods is also different. Therefore, if you have certain requirements for this, there will be some differences in the structure of Roots blower.

　　6. Noise value

　　This parameter is mainly aimed at specific users. It is common for customers who choose rotary fans. The noise value of their rotary fans will be much lower than that of roots fans, because some special industries need sewage treatment, such as hospitals. Everyone knows that the environment of hospitals needs silence, so the parameter of noise value becomes very important. Generally, purchasing customers have no requirements for noise value. Most of them are used in factories. The factory environment is too noisy. Roots blower has the characteristics of wide air volume range, wide pressure range and high cost performance, but the noise is not easy to solve.

　　Basic parameters of Roots blower

　　7. Brand

　　In fact, when many customers come to inquire about fans, they will have fans of a specified brand, or fans of * * brand have been used before, and now they want to change a manufacturer. Therefore, sometimes the brand will become a parameter for selection. If you contact us online through other brands, please inform us in advance that you need to specify a brand. For example, for rotary fans, we can only provide the fan model, and we can help you select the fan that is suitable for you, For other roots fans, you may need to provide (motor power, air volume and pressure) while providing models; Two parameters. We can select the accurate fan for you to compare.

　　8. What if there are no parameters?

　　Most unused customers of sewage treatment, pond aquaculture and steam compression do not have specific parameters. What should we do?

　　(1) Aquaculture customers can provide (aquaculture area and water depth), which can help us calculate the pressure and flow parameters.

　　(2) The aeration fan for sewage treatment can provide the length, width and height (water depth) of the pool, which can also calculate the flow pressure value.

　　(3) Customers for pneumatic conveying can provide parameters (vertical height, conveying capacity, conveying distance) to calculate flow and pressure parameters. (4) Waste water utilization customers can provide the manufacturer (evaporation treatment capacity, inlet and outlet temperature) or select models

　　The above contents are the basic parameters used in the purchase of Roots blower. We usually use the three parameters of flow, pressure and power, but not all of them. According to our understanding, ordinary three blade roots blower is used most, followed by two blade, two-stage series, dense and special sealing.

　　Shanghai Ruizhe Environmental Protection Equipment Group Co., Ltd. has been producing and selling roots blowers for 15 years! The products have grown up in stumbling and stumbling, and have become one of the few well-known small and medium-sized industrial fan manufacturers in China! Roots blower and roots vacuum pump produced by the company are widely used in pneumatic conveying, sewage treatment and water ecological treatment. At the same time, the company's annular high-pressure blower has been unanimously recognized by customers in food packaging, aquatic oxygenation and other scenarios!