INDUSTRY COMPONENT

Bottom Disc

The bottom disc is a critical structural component in disc stack centrifuges that supports the rotating assembly and facilitates separation processes.

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Component Specifications

Definition
The bottom disc is a precisely engineered circular plate located at the base of a disc stack centrifuge or separator. It serves as the foundational support for the entire rotating disc stack assembly, providing structural integrity, alignment, and stability during high-speed operation. This component typically features mounting points for the spindle, drainage channels for separated phases, and interfaces with the bowl housing. Its design ensures uniform distribution of mechanical loads and maintains the precise geometric arrangement necessary for efficient separation of immiscible liquids or solids from liquids.
Working Principle
The bottom disc operates on mechanical support and rotational stability principles. It transmits rotational force from the drive system to the disc stack while maintaining axial and radial alignment. During operation, it withstands centrifugal forces, supports the weight of the disc stack, and provides a sealed interface between rotating and stationary parts. The disc's geometry helps direct separated phases to appropriate outlets while minimizing turbulence and remixing.
Materials
Stainless steel (typically AISI 316L or 304), duplex stainless steels for corrosive applications, titanium for highly aggressive media, or specialized alloys for specific industry requirements. Surface finishes: Ra ≤ 0.8 μm for food/pharma applications, with optional coatings like electropolishing or hard chrome plating for wear resistance.
Technical Parameters
  • Max RPM 5000-15000
  • Diameter 150-1200 mm
  • Thickness 10-50 mm
  • Balance Grade G2.5 per ISO 1940
  • Mounting Type Tapered fit or bolted connection
  • Pressure Rating Up to 10 bar
  • Temperature Range -20°C to 150°C
Standards
ISO 1940, ISO 286, DIN 11850, ASME B46.1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Bottom Disc.

bottom disc disc stack centrifuge separator component centrifuge parts industrial separation rotating assembly support Bottom Disc in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Disc Stack

A stack of conical discs within a separation bowl that provides the surface area for centrifugal separation of immiscible liquids or solids from liquids.

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Engineering Analysis

Risks & Mitigation
  • Fatigue failure from cyclic loading
  • Corrosion in aggressive media
  • Imbalance causing vibration
  • Wear at mounting interfaces
  • Thermal stress cracking
FMEA Triads
Trigger: Material fatigue from cyclic stress
Failure: Crack propagation leading to catastrophic failure
Mitigation: Regular non-destructive testing (ultrasonic or dye penetrant), proper material selection, stress relief treatments
Trigger: Corrosive media attack
Failure: Reduced structural integrity and potential leakage
Mitigation: Use corrosion-resistant alloys, protective coatings, regular thickness measurements
Trigger: Improper installation or alignment
Failure: Excessive vibration and premature bearing failure
Mitigation: Precision alignment procedures, trained installation personnel, verification protocols

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.05 mm for critical dimensions, concentricity within 0.02 mm TIR
Test Method
Dimensional verification with CMM, balance testing per ISO 1940, pressure testing, material certification per ASTM/EN standards

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of a bottom disc in disc stack centrifuges?

The bottom disc provides structural support for the rotating disc stack, maintains alignment during high-speed operation, and facilitates proper flow distribution of separated phases.

How often should bottom discs be inspected or replaced?

Regular visual inspections should occur during routine maintenance (typically every 3-6 months), with dimensional checks and replacement recommended every 2-5 years depending on operating conditions and material wear.

Can bottom discs be customized for specific applications?

Yes, bottom discs can be customized in terms of material selection, diameter, thickness, mounting configuration, and surface treatments to meet specific process requirements and industry standards.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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