Customer Fan Selection Method

In engineering or practical applications, a reasonable choice of fan is a very important job. Fan Once selected, it will run a number of years in the production and life, a reasonable selection will bring the user's convenience and efficiency. Fan selection principles are as follows.
1, before selecting fan, production and product quality should be aware of the market situation ventilators, such as ventilators produced varieties, specifications and a variety of special-purpose products, as well as departmental standards, national best products out of product, the new product development and promotion and so should take full account of environmental protection requirements in order to select the best fan.
2, depending on the fan conveying gas physical and chemical properties, select the fan for different purposes. Conveying explosive and flammable gas should be selected from the explosion-proof fan; row dust or transporting coal or pulverized coal should choose Dust fan; transport of corrosive gases should be chosen preservative fan; work in high temperature applications or conveying high temperature gas should be selected high temperature ventilators.
3, select the fan performance icon Richard have two or more fan when available, preference should be given a higher efficiency, smaller machine number, a large adjustment range, of course, should be compared, weighed pros and cons of a decision.
4, if the selected fan impeller diameter than the original fan impeller is too large a lot, in order to take advantage of the existing motor shaft, bearings and bearing, etc., must start time critical speed, strength and fan of the original components of the motor shaft etc. accounting.
5, the choice of centrifugal fan, when it is equipped with motor power less than or equal to 75kw, do not just start with the installation of the valve. When the carriage of high temperature flue gas or air and the choice of boiler centrifugal induced draft fan, which should be set up to use the valve to prevent operation when cold cause overload.
6, silencer required ventilation system should be first choice of high efficiency, low circumferential speed of the impeller fan, and make it work at maximum efficiency point; ventilation system should be based on modes of transmission of noise and vibration generated, take appropriate muffler and damping measures. Fan and motor damping measures, generally adopt damping base, such as a spring or shock absorber rubber shock absorbers.
7, the choice of fans, fans should avoid using parallel or series operation. When unavoidable, you should choose the same model, the performance of joint work with the ventilator. When used in series, the first stage should be a fan to a pipeline connection between the second stage fan.
8, the choice of new fans should consider the full use of existing equipment, suitable for on-site fabrication and installation and safe operation and other issues.

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