Rotary filters

Rotary vacuum drum filter systems

Rotary filters are machines for separating a solid-liquid mixture. Rotary filters are ideal if your application requires robustness, minimal footprint, and uses solvents, Filtres Vernay® systems are the best continuous vacuum filtration solutions on the market. It is on the drum that the separation takes place: it is partially submerged in the tank.

This one is filled with slurry to be filtered, whose solid particles are maintained suspended by the oscillations of the agitator. Depression creates the void inside the drum. This will initiate the separation of the two phases:

The solid phase is drained by the cloth wich is fixed on the drum, while the liquid phase passes through the cloth into the drum and toward the dispenser, to form a cake wich size can vary from 5 to 80 mm.
During the rotation, the cake thus formed leaves the immersed part of the trough to successively undergo a washing operation, a drying and spinning operation at the end of the cycle which reduces the humidity of the cake, before the discharge
After that, the material is separated from the cake, and the discharge will depend on the selected mode.

With units available up to 480 m², Filtres VERNAY® sets the standard in solid-liquid separation technology. This compact filtration technology, available in many different sizes, provides an optimal solution, adapted both to your production objectives and your size constraints.

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Applications

Gas / liquid separator tank
Liquid pumps
Vacuum pumps
Automatic valves
Sensors
Optimized control system for filtration processes

Technical sheet

Video

Key features

Available in a wide range of sizes — from 0.1 m² to 120 m² (1.07 ft² to 1,292 ft²).
Choice of frame tank – integral or supported by an independent carbon steel frame
Innovative agitator rake design ensures solids remain in suspension and avoids sediment in the systemtank for better materials distribution
Wide range of choices for drum material to suit process demand – polypropylene, carbon steel (unlined or rubber-lined), stainless steel, as well as other materials
Internal suction pipes are flow-optimized to ensure efficient performance
Choice of four discharge styles to meet the needs of a wide range of slurry – scraper, belt/strings, roll, or an automatic micrometric scraper
Available for standard pulp of 10% w/w to 0.01% w/w for precoat systems

Why choose Filtres Vernay^®

With Filtres Vernay^®, each system is completely personalised to meet your process demands. You also get the experience that comes from selecting a company who’s been building vacuum drum filters for almost a century.

Surface area

Available Models	Area / size
	Minimum	Maximum
Drum Diameter mm /Inch	750 / 29.52	4590 / 180.7
Surface Area m² / ft²	0.1 / 1.07	120 / 1291.7

DISCHARGE MODE

Product specifications

Frame Construction

Standard: Frame integrated into tank structure
Optional: Carbon steel painted independent frame

Tank Materials of Construction

Standard: 304L, 316L or 904L stainless steel
Optional: special alloys, rubberlined carbon steel, polypropylene

Drum Draining Cells

Standard: polypropylene
Optional: PVDF, stainless steel

Filter Cloth Media

Materials: monofilament, multifilament and felt
Weave Style: plain, twilled, or satin
Wide range of mesh sizes, porosities and breaking strengths available

Operating Parameters

Temperature: up to 110° C (230° F)
Vacuum: -110 mm Hg to -650 mm Hg
Rotating speed: 0.6 min/revolution to 5 min/revolution
Final moisture content: as low as 4%
Minimum op. temperature : +5°C.

Standard Features

Rake-style tank agitator
Central distribution valve
High-efficiency design with low-cost wear parts
Gear-driven drum using rugged motor

Optional Features

Frame hood
Fully enclosed non-vapor-tight hood
Vapor-tight hood for vacuum atmosphere
Press rollers for combination of vacuum and pressure filtration to extract liquid
Micrometric scraper using simple mechanical system or two-gear reduced electromechanical system