SpiraVac Clarifier

Wastewater Treatment Canada
Suction Sludge Removal Clarifier

• More than 45 years of successful operation
• 11 feet to 130 feet in diameter
• Solids removal through suction orifices to ensure rapid return of active solids to the process. 

SPECS & PRICING: Contact Promag

Wastewater enters the Spiravac at the outer wall and is directed along the narrow raceway formed by the skirt and the outer wall. This flow pattern dissipates the wastewater’s hydraulic energy as it flows around the raceway and eventually spirals down under the skirt. Influent enters the main settling area from the full circumference of the skirt and slowly rises to pass over the centrally located effluent weirs. The inflow is prevented from flowing directly to the effluent weir by the specially designed race skirt, which extends down to approximately two feet above the tank floor. The spiraling flow pattern makes use of total tank volume for effective solids settling.  

Like the Spiraflo, the Spiravac’s peripheral-feed hydraulics have many advantages over center-feed clarifiers, such as: minimizing the waterfall effect, sludge wall creep and short circuiting.