Bottom Disc: Temperature Range -20°C to 150°C

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

Parameter	Typical range	Notes & selection driver
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

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

Standards

ISO 1940, ISO 286, DIN 11850, ASME B46.1

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Bottom Disc

Manufacturer profiles associated with Bottom Disc.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Bottom Disc