Filter Drum for Rotary Drum Vacuum Filters | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Filter Drum

Definition

The filter drum is the core rotating component of an industrial rotary drum vacuum filter, consisting of a cylindrical structure covered with filter media. As it rotates through the slurry tank, vacuum applied to the interior creates a pressure differential that draws liquid through the filter media while solids accumulate on the drum surface, forming a filter cake that is subsequently discharged. The drum is typically constructed from stainless steel, carbon steel, or special alloys, with material grade options such as 304 or 316L per ASTM A240. Key parameters include diameter (1000–5000 mm), length (2000–12000 mm), filtration area (5–120 m²), rotational speed (0.1–5 rpm), operating pressure (-0.08 to 0.3 MPa), operating temperature (-20 to 120 °C), surface roughness (Ra 0.8–3.2 μm), weight (2000–15000 kg), and tolerance (±0.5 mm per ISO 2768-m). These values are reference ranges for directory purposes and must be confirmed for the specific model and application with the legal manufacturer or supplier. The drum's design influences filtration efficiency, cake thickness, and discharge effectiveness. Proper selection requires consideration of slurry characteristics, desired throughput, and material compatibility. Verification of actual specifications, including material grades and standards, is essential before procurement. Maintenance signals include uneven cake formation, reduced filtration rate, or visible wear on the drum surface. Failure boundaries may involve structural deformation, corrosion, or filter media damage, which can compromise performance and safety.

Working Principle

The filter drum rotates partially submerged in a slurry tank. Vacuum applied to the interior creates suction that draws liquid through the filter media covering the drum surface, while solids are retained on the exterior to form a filter cake. The rotation carries the cake through washing, drying, and discharge zones before returning to the slurry tank. The drum's rotational speed and vacuum level control cake thickness and residence time, affecting overall filtration efficiency.

Common Materials

Stainless steel, Carbon steel, Special alloys

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	1000–5000 mm	Determines filtration area and throughput
Length	2000–12000 mm	Affects filtration area and cake discharge
Filtration Area	5–120 m²	Key capacity parameter
Rotational Speed	0.1–5 rpm	Controls cake thickness and residence time
Operating Pressure	-0.08–0.3 MPa	Vacuum or slight positive pressure
Operating Temperature	-20–120 °C	Limited by filter media and seal materials
Material Grade	304/316L	Corrosion resistance; 316L for higher resistanceASTM A240
Surface Roughness	Ra 0.8–3.2 μm	Affects cake release and cleaning
Weight	2000–15000 kg	Important for structural support and installation
Tolerance	±0.5 mm	Ensures proper sealing and alignmentISO 2768-m

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Drum Shell Part
Provides structural support and houses internal vacuum chambers

Material: Stainless steel
Filter Media Part
Surface material that separates solids from liquids

Material: Polypropylene, polyester, or metal mesh
Vacuum Chambers
Internal compartments that maintain vacuum during filtration cycle

Material: Stainless steel
Drainage Grid
Supports filter media and allows filtrate flow to vacuum system

Material: Stainless steel

Manufacturers of Filter Drum

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Frequently Asked Questions

What materials are commonly used for filter drums?

Filter drums are typically made from stainless steel, carbon steel, or special alloys. Material grades such as 304 or 316L are referenced per ASTM A240, but the actual grade must be confirmed with the manufacturer for your application.

What is the typical diameter range for a filter drum?

The diameter typically ranges from 1000 to 5000 mm, but this is a reference range. The exact diameter depends on the required filtration area and throughput, and must be verified with the supplier.

How does rotational speed affect filter drum performance?

Rotational speed, typically 0.1 to 5 rpm, controls cake thickness and residence time. Slower speeds allow thicker cakes and longer drying, while faster speeds increase throughput but may reduce cake quality. Optimal speed depends on the slurry properties.

What maintenance signals indicate a filter drum needs attention?

Signs include uneven cake formation, reduced filtration rate, visible wear or corrosion on the drum surface, or damage to the filter media. Regular inspection and verification of tolerances are recommended.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Vacuum up to 0.8 bar absolute, differential pressure up to 1.5 bar
flow rate:	0.5-200 m³/h per unit, depending on drum diameter and speed
drum speed:	0.1-3 rpm, adjustable based on cake formation
temperature:	-20°C to +120°C
slurry concentration:	1-40% solids by weight, optimal at 5-25%

Filter Drum

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards