The SD series tunnel pressure-in, shaft-out, counter-rotating axial flow local ventilation fan is a new generation of energy-saving local ventilation fans with a wide range of applications, developed based on the structural and technical performance of existing domestic counter-rotating axial flow fans. This product features a rational structure, a comprehensive range of specifications, high efficiency, significant energy savings, low noise, and long air delivery distances. It can be used as a complete unit or in separate units, depending on the ventilation resistance requirements, thereby reducing ventilation power consumption and energy conservation. For tunnels up to 2000 meters in length, air can be delivered without moving the fan, reducing worker workload and saving ventilation time. It is ideal for local ventilation in underground coal mines. It can also be used in high-pressure ventilation applications in the metallurgical, nonferrous metals, gold, chemical, shipbuilding, and ceramic industries. Main Applications and Scope of Use

This product is primarily used as a pressure-in local ventilation fan in tunnels and underground tunnels, suitable for local ventilation of mining working faces and various yard rooms. It is also suitable for local ventilation in other mines and various tunnels. Varieties and Specifications

This product is a series product with a comprehensive range of specifications and varieties.

SD Series Performance Table