Xinxiang Simo Blower Limited Company
Main products:Centrifugal Fan(Not for Hot Fire Smoke Venting and Mines), Axial Fan, Blower Fan Part(Not for Hot Fire Smoke Venting and Mines)
Contact Us
  • Contact Person : Mr. Sun Kevin
  • Company Name : Xinxiang Simo Blower Limited Company
  • Tel : 86-373-5828637
  • Fax : 86-373-5828638
  • Address : Henan,XinXiang City,North of HePing Road,FengQuan District,Xinxiang City,Henan Prov,P. R. CHINA.
  • Country/Region : China
  • Zip : 453011

Three Lobs Roots Rotary Blower

Three Lobs Roots Rotary Blower
Product Detailed
1.Used for civil and industrial use 2.Three Lobs Roots Rotary Blower 3.Speed:1450rpm 4.9.8~58.8kpa 5.1.14~1.66m3/min

Three Lobs Roots Rotary Blower 




Three Lobs Roots Rotary Blower are unsed for  both Civil and industrial use.The helical construction uses the stator helical method that the screen lines of casing at the suction and discharge sides are cut to a helical shape ,and the triangle suction and discharge sides port formed by a straight line of the rotor top is to be opened and closed gradually.

Therefore, the suction and discharge ports of this type is not opened or closed at moments, which makes these blowers have an only limited operation sound and almost free from pulsations from discharges.

The rotors are three-lob straight type, so that the rotors can not interfere with each other, resulting from minor displacements in the thrust direction as in the helical type. Therefore, the clearance between the rotors should be assured in the profile direction only and thus there is no necessity of an excessive clearance on account of displacements in the thrust direction as in case of the rotor helical type. From such reasons, these blowers have a very high efficiency, in comparison with the rotor helical type of same dimensions.

By adoption of an unique profile of rotor, the clearance between the rotors can be held to be constant, which makes the efficiency even higher.

The precision of rotors is fully controlled and variation of precision between blowers is almost nil because the rotors are produced under the mass production control by utilizing a prenision NC matching. In addition, the rotors are dynamically balanced in the fabrications as in the case of conventional rotors which are still unbalanced.

The advancedest driving gears are adopted not only to extend the use life but also to make noise lower. The gears are made in special Cr-Mo steel by hardening treatment and are made according with gear precision of JISI first-class. Therefore, the harmful disturbances to products from gears are avoided.

The transported air is clean and is any oil-dust free oil lubrication is not needed in casing and the structure design present the bearing oil and gear oil from entering the casing.

With the establishment of quality management system and manufacture management system, the aims of parts exchanging, less production cost and rapid delivery are realized. The blowers of right quantity are keeped in stock to make delivery in time.


How to use performance tables

The performance tables give the model number, bore, r.p.m, discharge pressure, air capacity and required power of the blower.


The air capacity in the tables is indicated in the standard suction state. The standard suction state herein mentioned is defined as the condition at 20°C temperature, 1,0332kgf/cm2 (101.3kpa) absolute pressure and 65% relative humidity.


The reference air capacity (0°C temperature and 1.0332kgf/cm2 (101.3kpa) absolute pressure) is generally indicated in Nm3/min


However, it many be converted into the standard air capacity by the following equation, if the suction pressure is equal.




Where. Qs: standard air capacity; and


QN: reference air capacity.


The discharge air capacity can be converted into the standard air capacity by the following equation.


Qs=QdX  X


Where ,Qd: discharge air capacity, in m3/min;

      Pa:  discharge pressure, in kgf/m2;

      ts:  suction temperature, in °C;

      td: discharge temperature, in °C


According to the air capacity and the discharge pressure as calculated above , the model number, bore, r.p.m and required power can be found in the performance table.


The motor power are indicated by motor marking, and the motors powers to be used should be indicated.


The choice is overlapped depending upon the type of blower. For reference, however, selection should be lower number blowers for the economy and higher number blowers for the sound level.

Three Lobs Roots Rotary Blower

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