Beloit 42-46 DD4000 Refiner Quill

Beloit DD4000 46-inch Refiner Quill

Rebuilt

The Beloit 42-46 DD4000 refiner quill is a major component of a double disc (DD) refiner used in the pulp and paper industry, designed to process wood pulp for papermaking. Refurbished units and parts are available from specialized machinery suppliers. 

Product Details

The DD4000 series refiners are manufactured by Beloit Jones (now part of Valmet/GL&V) and are known for their robust design and precise control over fiber treatment. 

• Function: The quill is the rotating assembly of the refiner, which, in conjunction with the stationary plates, refines the pulp stock.
• Size: The 42/46 designation refers to the ability to use either 42-inch or 46-inch diameter refiner plates.
• Material: The packing sleeve on the shaft is typically centrifugally cast Type 316 stainless steel, often coated with ceramic for durability and a precision polish. Other components in the stock contact area are generally 316 stainless steel or 304 stainless steel lined, depending on the specific model variation (e.g., Model 4300).
• Design: The DD4000 refiners feature a "Duoflo" operation, which uses a spoked rotor to allow stock to pass in parallel across both sets of disks, optimizing refining efficiency.