答：羅茨風機選購時需要的基本參數有一下幾種：

　　1、風壓參數

　　用過羅茨風機或采購過羅茨風機的朋友都知道，羅茨風機選型必不可少的參數之一就是壓力(風壓)參數了，也有很多客戶來詢羅茨風機的時候就會說你們有沒有**kpa的風機，這些客戶都是曾經用過風機的，或者剛設計出參數的一些客戶.小編就不多說了

　　2、風量(流量)參數

　　流量(風量)參數是羅茨風機選型另外一個比較重要的參數，當然選型的時候必須知道壓力參數跟風量參數，基本上就可以進行選型了，能夠確定基本風機型號是多少了。所以，以上兩個參數，壓力和風量必須要有準確的數據，關系到后期風機適不適合用在工況現場。

　　3、電機功率

　　電機功率是相配套的參數，風機需要電機帶動才能進行正常的運行，如果風機在根據壓力和風量的情況下確定了，那么電機功率也就基本確定了，這是標準選型樣本上所定的，當然不排除有一小部分客戶采用非標電機，電機功率可能大可能小，但是能夠帶動機頭工作，但是在節能或者其他方面有些不足的地方。有很多用過的客戶來詢風機的時候都會問：有沒有**kw的風機，或者**kw風機多少錢，這些客戶有一部分是之前用過風機，有一部分是咨詢其他用過風機的。

　　4、轉速

　　有些客戶在詢風機的時候，對轉速的參數也是有要求的，其實風機的轉速影響到風量，為何對轉速有要求呢?除了行業方面的原因以外，雖然不同轉速能夠滿足同一個工況，但是，現在風機的時候應當盡量選擇轉速相匹配的，轉速越高風機的磨損越快，使用壽命就越短。

　　5、特殊密封特殊要求也

　　會影響到我們進行選型，如輸送沼氣、煤氣等特殊氣體，輸送此類氣體需要進行特殊密封，所以，如果您輸送此類氣體，羅茨鼓風機在制造時會有一定的不同，密封方式方面會有一定的小差異。如活塞環密封、N4機械密封、H抽氣密封、K單機械密封、G型充氮氣密封等，不同的密封方式造價也不同，所以，如您對此有一定的要求，羅茨鼓風機的結構形式上又會出現一定的差異化。

　　6、噪音值

　　這個參數主要針對特定的用戶，多見的就是選用回轉風機的客戶，本身回轉風機的噪音值就會比羅茨風機的噪音值要小很多，因為有些特殊行業需要污水處理，例如：醫院，大家都知道醫院的環境就是需要肅靜，所以，噪音值這個參數就變得非常重要了。一般采購的客戶對于噪音值并沒有什么要求，大多數用于工廠，工廠環境本身噪音偏多，羅茨鼓風機的特性就是：風量范圍廣、壓力范圍廣、性價比高，但是就是噪音不太好解決。

　　7、品牌

　　其實有很多客戶來詢風機的時候，都會有指定品牌風機，或者之前用過**品牌的風機，現在想換一個廠家，所以，有時品牌也會成為一個選型的參數，如果您在網上通過其他品牌聯系到我們，請事先告知我們您需要指定品牌，如回轉風機，可以只提供風機型號我們就可以幫您選出適合您的風機，其他羅茨風機，提供型號的同時，您可能需要提供(電機功率、風量、壓力)其中;兩個參數。我們才能給您選出準確的風機，讓您進行作對比。

　　8、沒有參數怎么辦?

　　大多數污水處理、水池養殖、蒸汽壓縮的沒有用過的客戶都是沒有具體的參數，怎么辦呢?

　　(1)水產養殖客戶可以提供(養殖面積及水深)，就可以幫助我們推算出壓力及流量參數。

　　(2)污水處理曝氣用風機，可以提供水池的(長、寬、高[水深])分別是多少，這樣也可以推算出流量壓力值。

　　(3)氣力輸送用的客戶，可提供(垂直高度，輸送處理量，輸送距離)等參數，推算出流量及壓力參數。(4)廢水利用客戶可以提供給廠家(蒸發處理量、進出口溫度)等，也可以來選型

　　以上內容便是羅茨風機選購中用到的基本參數了，我們常用到的就是流量、壓力、功率這三個參數，而非全部用到，根據我們的了解，普通的三葉型羅茨鼓風機用的*多，其次便是二葉型、雙級串聯型、密集型還有特殊密封型。

       上海瑞柘環保設備集團有限公司生產銷售羅茨鼓風機已15年了！產品在磕磕絆絆中成長至今，已經成為國內為數不多知名的中小工業風機廠家！公司生產的羅茨鼓風機、羅茨真空泵在氣力輸送、污水處理、水生態治理中應用廣泛。同時公司的環形高壓鼓風機在食品包裝、水產增氧等場景中獲得了客戶的一致認可！

　　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!