The blade profile of a centrifugal impeller has a bigger effect on performance than almost any other factor. Backward-curved blades are the most efficient and run stably across a wide range, making them ideal for clean-air ventilation and high-pressure duties. Radial (straight) blades are mechanically simple and self-cleaning, which suits dusty and material-laden airstreams such as pneumatic conveying. Forward-curved blades move a large volume at a lower speed but are less efficient and best kept to clean, low-pressure air.
Matching blade type to the gas stream avoids premature wear and wasted energy. We select the blade profile for each series around its intended job — efficient backward and radial designs for ventilation, milling, forging and conveying — and can advise where a specific duty calls for a different choice.