INDUSTRY COMPONENT

Impeller Hub

Central structural component connecting impeller blades to pump shaft in high-pressure fish pumps

Component Specifications

Definition
The impeller hub is the precision-engineered central component of a high-pressure fish pump impeller assembly, designed to securely mount and position impeller blades while transmitting rotational torque from the pump shaft. It serves as the structural backbone that maintains blade alignment, distributes hydraulic loads, and ensures balanced rotation under extreme pressure conditions encountered in fish transfer applications.
Working Principle
The hub converts rotational energy from the pump shaft into centrifugal force through rigid blade attachment, creating pressure differentials that move fish and water mixtures. Its balanced design minimizes vibration while withstanding axial and radial forces generated during operation.
Materials
316L stainless steel (marine grade) with optional duplex stainless steel variants for corrosive environments; Hardness: 25-32 HRC; Surface finish: Ra 0.8 μm or better
Technical Parameters
ParameterTypical rangeNotes & selection driver
Mounting MethodBolted or welded blade attachment
Pressure RatingUp to 25 bar
Balance StandardG6.3 per ISO 1940
Shaft ConnectionKeyed or splined interface
Temperature Range-10°C to 80°C
Corrosion ResistanceASTM A240 compliant

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 5199, ISO 1940-1, DIN 24255

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Corrosion fatigue
  • Cavitation damage
  • Shaft misalignment
  • Imbalance-induced vibration
  • Bolt fatigue failure
FMEA Triads
Trigger: Saltwater corrosion
Failure: Reduced wall thickness leading to structural failure
Mitigation: Regular thickness testing and protective coating application
Trigger: Improper installation torque
Failure: Blade detachment during operation
Mitigation: Torque wrench calibration and installation procedures
Trigger: Cavitation erosion
Failure: Surface pitting and imbalance
Mitigation: Maintain proper NPSH and pump operating parameters

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.05 mm on critical dimensions, concentricity within 0.02 mm TIR
Test Method
Dimensional verification with CMM, hydrostatic pressure testing at 1.5x rated pressure, dynamic balance testing per ISO 1940

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
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Impeller Hub

Manufacturer profiles associated with Impeller Hub.

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Frequently Asked Questions

Why use stainless steel for fish pump impeller hubs?

Stainless steel provides optimal corrosion resistance against saltwater, fish waste, and cleaning chemicals while maintaining structural integrity under high pressure and mechanical stress.

How often should impeller hubs be inspected?

Visual inspection every 500 operating hours, with dimensional checks and balance verification during annual maintenance or after impact events.

Can impeller hubs be repaired if damaged?

Minor surface damage can be machined, but replacement is recommended for cracks, significant wear, or balance issues affecting pump performance.

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.

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