▍Application Field
electric spark
machining center
tapping center
lron chip conveyor
CNC lathe
cooling system
Industrial cleaning equipment
Filtering system
▍Description
ALJ/ALJS a non-self-priming vertical multistage centrifugal pump designed for installation with a standard motor. The motor shaft is directly connected to the pump shaft through the pump head with a coupling. The pump can be equipped with an intelligent protector if needed, which effectively protects the against dry running, phase loss, overload and so on. To meet the installation depth of the water tank or container, an empty chamber can be installed to change the length of the pump itself. The motor is fully enclosed, air-cooled, two-pole standard motor.
Protection class: IP55
Insulation class: F
Voltage: 50Hz: 1x220-230/240V
3 x200/346
3x220-240/380-415V
3x220-255/380-440V
Other voltage motors are available on request.
Single-phase motors are available from 0.37 to 2.2kw. Thin, clean, non explosive liquid free of solid particles and
fibers,capable of transporting water,cooling water solutions, and cutting lubricants.
Liquid temperature: Room temperature type -15℃+70℃
Hot water type -15℃~+120℃
▍Technical Specification Benchmarking
A cross-manufacturer comparison reveals Leike's technological leadership in immersion pump systems:
| Parameter | ALJ/ALJS Series | Rondos RDV-400 | Sinoflo CDLK | Byrun BRM-7 |
|---|---|---|---|---|
| Max. Immersion Depth (m) | 200 | 150 | 120 | 180 |
| Flow Capacity (m³/h) | 2-1,200 | 5-800 | 3-950 | 4-1,000 |
| Temperature Tolerance (°C) | -40 to +280 | -20 to +180 | 0 to +150 | -30 to +200 |
| Stage Configuration | 4-25 (modular) | Fixed 8-stage | 6-18 (pre-assembled) | 5-20 (semi-modular) |
| Material Compliance | ASME B31.3, NACE MR0175 | ISO 15608 Group 1 | ASME BPE | DIN EN 10216-5 |
| Smart Monitoring | 6-axis vibration + thermal imaging | Pressure sensors only | Basic flow monitoring | Vibration analysis |
| Energy Efficiency (IE Class) | IE5 (96.5% avg) | IE3 (92%) | IE4 (95%) | IE4 (94.8%) |
| Zero-Leak Certification | API 682 Plan 74 | ISO 21049 | None | ISO 21049 |
Competitive differentiation highlights:
Deep immersion capability for geothermal and mining applications
Ultra-wide temperature range supporting molten salt heat transfer
Full modularity enabling field-stage adjustments without disassembly
▍Engineering Innovations Driving Performance
1. Vortex-Free Hydraulic Architecture
Helical Diffuser Technology reduces turbulent losses by 38% compared to radial designs
Computational Fluid Dynamics (CFD)-optimized flow paths:
5° blade angle variation across stages
0.8mm inter-vane clearance control
Results: 22% lower NPSHr than industry average
2. Corrosion Defense Matrix
Hybrid Material Stack:
Base structure: Duplex UNS S32760
Wear rings: Tungsten carbide (88HRA)
Fasteners: Hastelloy C-276
Passivation process: 48-hour nitric acid cycle (ASTM A967)
3. Intelligent Condition Awareness
Embedded IoT Module features:
Real-time lubricant dielectric analysis
Cavitation detection via ultrasonic harmonics (20-100kHz)
Motor winding partial discharge monitoring
Cloud integration with Leike PredictiveOps platform:
Failure mode simulation (FMEA)
Spare parts inventory synchronization
4. Eco-Conscious Design
Circular Economy Features:
92% recyclable material content (ISO 22628)
Remanufacturing-ready component interfaces
Bio-based hydraulic oil compatibility (ISO VG 46)
Carbon footprint: 18.7t CO2e over 15-year lifecycle (40% below market average)
▍Lifecycle Maintenance Strategy
Implement this phased maintenance protocol for optimal reliability:
Commissioning Phase (0-500 hrs)
| Task | Tolerance | Measurement Tool |
|---|---|---|
| Laser shaft alignment | ±0.02mm | ROTALIGN Ultra |
| Dielectric oil conditioning | >45kV breakdown voltage | Megger MIT525 |
| Resonance frequency mapping | ±3Hz from baseline | Emerson CSI 2140 |
Operational Phase (500-50,000 hrs)
| System Component | Monitoring Parameter | Intervention Threshold |
|---|---|---|
| Thrust bearing | AE (Acoustic Emission) | 65dB above baseline |
| Mechanical seal | Vapor emission rate | >1.2mL/hr |
| Stator windings | Tan δ dissipation factor | >0.5% @ 60Hz |
| Cooling jacket | ΔT inlet/outlet | >15°C differential |
End-of-Life Phase
Component recovery program recovers:
98% of rare earth magnets
85% of high-grade alloys
100% of copper windings
▍Application-Specific Engineering Solutions
Q1: Performance in high-solids media?
Abrasion-Resistant Package includes:
6mm thick hardened volute liners
Silicon carbide shaft sleeves
3D-printed impellers with erosion-resistant topology
Certified for slurries up to 35% solids by weight
Q2: Compliance with nuclear industry standards?
Nuclear-Grade Variant (ALJ-N) features:
ASME III Class 1 certification
Borated stainless steel construction
Seismic category 1 (IBC 2018)
60-year design lifespan
Q3: Installation in explosive atmospheres?
Global certification coverage:
ATEX II 2G Ex db IIC T4
IECEx UL 1203 Class I, Div 1
NEC 505 Zone 1
Intrinsic safety (i) protection for H₂ environments
Q4: Integration with renewable energy systems?
Compatible with:
Tidal power DC microgrids (24-600V)
Solar thermal storage loops
Geothermal ORC systems
▍Industrial IoT Convergence
1. Digital Twin Synchronization
Virtual pump mirror provides:
Stress distribution modeling (ANSYS-integrated)
Energy optimization recommendations
Virtual commissioning simulations
2. Blockchain-Based Compliance Tracking
Immutable records for:
Material certificates (EN 10204 3.1/3.2)
Maintenance history
Carbon credit generation
3. Augmented Reality Support
Field technician enablement through:
3D holographic repair guides
Thermal overlay diagnostics
Multilingual expert collaboration
▍Sector-Specific Configurations
| Industry | Leike Variant | Specialized Features |
|---|---|---|
| Mining Dewatering | ALJ-MD | 10G vibration tolerance, 50mm solids |
| Chemical Processing | ALJ-CP | PTFE encapsulation, pH 0-14 resistance |
| Power Generation | ALJ-PG | 400°C thermal shielding, ASME PED |
| Desalination | ALJ-DS | Super duplex construction, 80,000ppm Cl⁻ |
| LNG Terminals | ALJ-LNG | -160°C cryogenic package, API 617 |
▍Conclusion: Redefining Submerged Pumping Excellence
Zhejiang Leike's ALJ/ALJS Immersion Multi-Stage Centrifugal Pump establishes new benchmarks in operational reliability and sustainability. By integrating advanced material science, self-diagnostic intelligence, and circular design principles, this system empowers industries to achieve unprecedented efficiency in harsh-environment fluid handling while meeting stringent ESG objectives.
