Backward Curved EC

When it comes to centrifugal blowers, there are two main types of impellers: forward curved and backward curved. Each type of impeller has its own unique characteristics and advantages.

A forward curved impeller generates flow in a radial direction by creating static pressure across the longer length of its blades. On the front side of the blade, a positive pressure is generated, pushing the air outwards, while on the reverse side of the blade, a negative pressure is created. This negative pressure draws air into the space, so that the front side of the following blade picks it up and pushes it outwards. This type of impeller can be used with or without a scroll expansion housing, providing a steep pressure characteristic over the normal working range and a power characteristic that does not overload the drive motor at higher flow rates.

A backward curved impeller, on the other hand, generates flow in a radial direction by creating dynamic pressure across the shorter length of its blades. This means that the pressure difference is created by the velocity of the air rather than the pressure across the blades. The backward curved impeller is generally more efficient and produces less noise than the forward curved impeller. It is typically used in high-volume, low-pressure applications where noise reduction is important.

In summary, while both forward and backward curved impellers can be used in centrifugal blowers, each has its own unique advantages and characteristics. At YS Tech USA, we offer a range of centrifugal blowers with both types of impellers to meet the diverse needs of our customers. Contact us today to learn more about how our thermal control solutions can help you achieve your goals.