长沙三叶罗茨鼓风机有限公司生产的TAR300罗茨风机、TAR350罗茨风机是采用三叶叶型的双级罗茨风机，一般采用的是直联传动方式，直联传动包括进口过滤器、弹性接头、一级风机、进口消声器、安全阀、电机、放空消声器、放空闸阀、止回阀、闸阀、三通接管、压力表、出口消声器。

TAR300 Roots fan, TAR350 Roots fan is generally used to transport clean air, if through its seal structure, materials and other appropriate changes, can also be used to transport industrial gases from all over the world, to meet the different kinds of industrial use.