Magnetic Drive Pump Datasheet Key Parameters - Specification Guide

Standard Process Parameters

Magnetic drive pump datasheets share common parameters with conventional pumps, plus unique mag-drive specific requirements.

Process Conditions

Fluid Properties

Unique Mag-Drive Parameters

These parameters are specific to magnetic drive pumps and must be included in every datasheet:

Maximum Allowable Temperature (MAT) for Magnets

Specification Format:

Magnet Type: NdFeB N35UH (or SmCo Sm2Co17)
Maximum Allowable Temperature: ___°C
Demagnetization Temperature: ___°C (irreversible damage)

Critical Check: Process temp + Eddy current rise + Safety margin < MAT

Minimum Flow Requirement

Why it’s critical: Mag-drive bearings use process fluid as lubricant. No flow = no lubrication = bearing failure in seconds.

Specification Format:

Minimum Continuous Flow: ___ m³/h (___ % of rated flow)
Minimum Intermittent Flow: ___ m³/h (max ___ minutes)
Recirculation Line Required: Yes/No
Recirculation Line Size: ___ mm

Containment Shell Specifications

Material Selection Guide:

Eddy Current Losses

When using metallic containment shells, specify required data:

Eddy Current Losses: ___ kW (at rated speed)
Heat Generated: ___ kcal/h
Temperature Rise at Min Flow: ___ °C
Shell Type: Metallic / Non-metallic

Typical Values:

Material Specifications

Wetted Parts

Magnet Assembly

Bearings

Performance Data Requirements

From Vendor - Must Provide

=== PERFORMANCE DATA ===
Rated Point:
- Flow: ___ m³/h
- Head: ___ m
- Efficiency: ___ % (pump only)
- Power absorbed: ___ kW (shaft)
- NPSH required: ___ m

Losses:
- Eddy current losses: ___ kW
- Bearing/friction losses: ___ kW
- Total magnetic losses: ___ kW

Motor:
- Rated power: ___ kW
- Efficiency: ___ %
- Power factor: ___
- Total electrical input: ___ kW

Overall wire-to-water efficiency: ___ %

Performance Curve Requirements

Request curves showing:

• Head vs Flow (with efficiency overlay)
• Power vs Flow
• NPSH required vs Flow
• Operating point clearly marked
• BEP and preferred operating region identified

Instrumentation Requirements

Mandatory Protection Systems

Specification Format

=== INSTRUMENTATION ===
Temperature Sensors:
- Rear bearing: PT100, 4-wire, Alarm ___°C / Trip ___°C
- Containment shell: PT100, 4-wire, Alarm ___°C / Trip ___°C

Flow Protection:
- Type: Flow switch / Minimum flow orifice / ARC valve
- Setpoint: ___ m³/h (trip below)

Power Monitoring:
- Type: Motor power monitor
- Trip condition: >___% power drop

Interlocks:
- [ ] Auto-stop on high temperature
- [ ] Auto-stop on low flow
- [ ] Prevent start without liquid

Vendor Data Requirements

Information to Provide to Vendor

Process Data (Buyer provides):

• Service description and fluid name
• All operating conditions (flow, head, temp, pressure)
• Fluid properties (SG, viscosity, vapor pressure)
• NPSH available calculation
• Site conditions (ambient, elevation, hazardous area)

Equipment Requirements (Buyer specifies):

• Applicable standard (API 685, ISO 15783)
• Magnet type preference (if any)
• Containment shell material requirement
• Bearing material requirement
• Instrumentation requirements
• Spare parts requirements
• Documentation requirements

Information to Request from Vendor

Must-Have Documents:

Critical Vendor Confirmations:

=== VENDOR CONFIRMATION REQUIRED ===

1. Magnet System:
   - Magnet type and grade: ________
   - Maximum allowable temperature: ___°C
   - Torque capacity: ___ Nm
   - Service factor applied: ___

2. Containment Shell:
   - Material: ________
   - Thickness: ___ mm
   - Design pressure: ___ barg @ ___°C

3. Thermal Analysis:
   - Eddy current losses: ___ kW
   - Temperature rise at min flow: ___°C
   - Total temp < Magnet MAT? YES/NO

4. Minimum Flow:
   - Minimum continuous: ___ m³/h
   - Minimum intermittent: ___ m³/h (max ___ min)

5. Bearings:
   - Material: ________
   - L10 life: ___ hours
   - Max solids tolerance: ___ ppm

Common Datasheet Mistakes

Critical Oversights to Avoid

Design Review Checklist

=== MAG-DRIVE PUMP DATASHEET CHECKLIST ===

□ Process Conditions
  □ Normal, minimum, maximum flow specified
  □ Operating temperature (normal + maximum)
  □ NPSH available > NPSH required + 1.5m margin
  □ Fluid properties complete
  □ Solids content specified

□ Magnet System
  □ Magnet type appropriate for temperature
  □ Process temp + Eddy losses < Magnet MAT verified

□ Minimum Flow Protection
  □ Minimum continuous flow specified
  □ Recirculation line sized

□ Containment Shell
  □ Material selected for corrosion + temperature
  □ Design pressure adequate

□ Bearings
  □ Material compatible with fluid
  □ L10 life > 25,000 hours

□ Instrumentation
  □ Bearing temperature sensor
  □ Shell temperature sensor
  □ Flow/power protection
  □ Interlocks defined

Summary Table