Ultra-V Vertical Pressure Screen

The Ultra-V screen is designed to meet today's rigid standards of efficiency, capacity and durability. Engineers use advanced digital technology in Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) to test each element of the screen's operation and construction.

Many contaminants found in the papermaking slurry are lightweight particles. Other vertical screens are fed at the top and rejects are discharged at the base of the screen body. In such screens, the lightweight contaminants remain in the screening are far too long, and could potentially be accepted before they move downward to the reject chamber. Heavy contaminants passing through the screening area can also catch in the rotor mechanism, causing serious damage to the screen cylinder and rotor.

The Ultra-V screen eliminates both problems with its patented bottom inlet, upflow design. Lightweight particles naturally travel to the top reject outlet for quick removal along with any entrained air. Heavy debris is rejected in the bottom without ever entering the screening zone, thereby eliminating the possibility of damage to the rotor and/or screen cylinder.

For applications where high debris levels exist, an optional top cover is available featuring a center rejects outlet and integral dilution port. Working together, the rejects outlet and dilution port provide optimized reject control, i.e. consistency and rate. The contoured styling of this cover also reduces the opportunity for wear to occur due to orbiting debris. The screen's overall body design, coupled with its well-proven performance, provides unparalleled reliability and efficiency.

The latest cylinder and rotor design technologies are available with the Ultra-V screen line to suit any application requirement. A wide range of screen cylinder contours and opening sizes are available in both drilled hole and slotted designs. Also, multiple rotors are available- standard foils, low pulse, low power (LP-I) and non-stringing (NS-III).

Features

• Inlet pipe at bottom, discharge pipe at top- eliminates any pipe crossing and lowers installation costs
• Heavy, rugged base with open design provides easy access to belts, sheaves and retainer bolts and make maintenance easier
• Heavy duty drive and mechanical seal assembly can be removed as a unit and reduces downtime for maintenance
• Cylinder and rotor are easy access for cleaning, adjustment, inspection and removal
• Long lasting 316L stainless construction for all wetted parts
• Units ruggedly designed for 125 psi operating pressure

Benefits

• Heavy debris rejected to junk box in bottom, preventing wear and damage to rotor/screen cylinder- saves downtime
• Lightweight debris and air removed immediately through top reject- better quality pulp
• More efficient debris removal- contaminants remain in screening zone for less time, substantially lowering the possibility of recirculation
• Lower inlet pressure requirement lowers the cost of operation
• All screen cylinder designs, i.e. smooth, contoured, holed, slotted, etc., can be used

Kadant Black Clawson Inc., 605 Clark Street, Middletown, OH 45042. Tel: 513-424-7400; Fax: 513-424-1747.