The Asco 456 series represents the largest capacity within this line of liquid ring vacuum pumps, ideal for demanding industrial applications requiring significant air flow and deep vacuum (up to 33 mbar absolute). Designed for continuous, reliable operation, both the Asco AVM 456 and the Asco AVL 456 excel at handling wet processes and vapors thanks to the liquid ring principle and virtually isothermal compression.
Both models share the same robust core hydraulics, resulting in identical performance curves with an impressive vacuum capacity of up to approximately 500 m³/h. They are also available in the same high-quality material combinations(cast iron/RS 316 or all stainless steel 316) to meet various chemical resistance requirements. The crucial difference, however, lies in the construction method, which determines which model is best suited for your specific installation.
AVM 456: Focus on Compactness
The Asco AVM 456 is the monoblock variant. Pump and motor form one compact unit, with the impeller mounted directly on the motor shaft. This results in the most compact design for this capacity class, ideal for integration into systems or installations where space is a limiting factor. It comes standard with an efficient direct-coupled motor.
AVL 456: Maximum Flexibility
The Asco AVL 456 uses a lantern piece construction. An intermediate piece with a flexible coupling connects the pump to a standard B5 flange motor. This construction offers ultimate flexibility: you can choose a motor that meets specific requirements (brand, specifications) or is suitable for special environments, such as ATEX classified zones for which the AVL 456 is certified.
So choose the AVM 456 if compactness is a priority, and the AVL 456 if motor flexibility or ATEX compliance is required. Both models deliver the highest capacity and reliable vacuum performance within the Asco AVM/AVL range.
