Screw pump (heavy oil)

Description

1. Product Overview
   Screw pump (heavy oil) is a robust positive-displacement pump engineered for continuous transfer and metering of high-viscosity hydrocarbon fluids and heavy fuel oils across industrial operations. Its primary industrial use is reliable loading, unloading, circulation and injection of heavy oils in refining, bunkering, power generation, and upstream production facilities. The key value proposition is high volumetric efficiency with low shear, minimal pulsation, and sustained performance under high viscosity and elevated temperatures — reducing downtime and lifecycle pumping costs. Strategically, this pump addresses a critical bottleneck in global heavy-oil logistics by enabling consistent throughput, lower maintenance intensity, and safer handling of demanding fluids, making it a cornerstone asset for operators seeking predictable uptime and optimized total cost of ownership.

2. Key Specifications & Technical Characteristics

• Pump type: Twin-/triple-screw positive-displacement heavy-oil pump (selectable configuration based on viscosity and flow requirements).

• Materials of construction: Wetted parts in high-chrome alloy steel or stainless steel options (AISI 316L, Duplex 2205, optional Ni-based alloys); casings in carbon steel (with internal coatings) or stainless steel.

• Sealing options: Mechanical seal (single/double) with quench, cartridge seal format; optional gland packing for legacy systems.

• Viscosity range handled: Typical 50–10,000 cSt (application-specific selection and heating recommended above 500 cSt).

• Temperature range: -20 °C to 240 °C standard; higher-temperature designs available.

• Flow rates: Modular designs from 0.5 m³/h to 1,500 m³/h depending on screw size and drive.

• Differential pressure capability: Up to 25 bar (higher pressure variants on request).

• Drive interfaces: IEC/JIS flange-mounted electric motor, gas engine, or gearbox-driven; variable-speed drive compatibility (VFD).

• Shaft tolerances and clearances: Precision-ground screws with controlled clearances for low slip and high volumetric efficiency.

• Surface finish: Internal wetted surfaces Ra ≤ 0.8 µm standard; polished finishes for low-fouling applications.

• Bearing system: Heavy-duty roller or journal bearings with lubrication circuits and temperature monitoring ports.

• Mounting: Horizontal or vertical configurations; close-coupled and baseplate mounted options.

• Instrumentation ports: Temperature, pressure, and vibration monitoring provisions; porting for in-line thermowells.

• Compliance & testing: Hydrostatic and performance testing to API 676 / ISO 9001 manufacturing protocols (specific certifications available per order).

• Packaging options: Sea-freight suitable wooden crates with corrosion protection, steel skids for direct mounting, or export-ready packed units with desiccant and shrink-wrap.

• Shelf life / preservation: Not applicable for mechanical equipment; preservation for storage up to 24 months with recommended periodic inspection and re-greasing.

• Spare parts kit: Optional OEM spare seal, screw set, and bearing kit supplied per unit.

3. Core Industrial Applications

• Oil terminals and bunkering: High-capacity transfer of heavy bunker fuels and marine residuals where low-shear, steady flow is required for safe ship-to-shore operations.

• Refineries and blending facilities: Metered circulation and dosing of heavy feedstocks, residue recirculation, and blending of viscous streams with minimal product degradation.

• Power generation (thermal plants): Supply and circulation of heavy fuel oil to burners and heaters with stable flow under variable loads.

• Upstream production & FPSO: Offloading and transfer of viscous crude, sludge, and produced heavy fractions in offshore and onshore production facilities.

• Petrochemical feedstock handling: Transfer of viscous intermediates where tight volumetric control reduces downstream process variability.
  Why it outperforms alternatives:

• Efficiency: Screw pumps deliver near-constant volumetric flow across pressure ranges, reducing energy waste compared with centrifugal pumps for viscous fluids.

• Low shear & gentle handling: Internal design minimizes shear and emulsification, preserving product integrity—critical for downstream processing and blending.

• Durability & uptime: Heavy-duty materials, robust bearing systems, and standardized cartridge seals reduce maintenance frequency and mean-time-to-repair versus less-specified pumps.

• Operational flexibility: Broad viscosity and temperature handling with VFD compatibility enables process optimization and fuel savings.

4. Competitive Advantages

• Quality consistency: Manufactured to controlled tolerances with documented QA/QC, material traceability, and factory acceptance testing to ensure repeatable performance across units.

• Supply reliability: Production capacity geared for B2B bulk orders with prioritized lead times for long-term contracts; global after-sales parts availability through regional distributors.

• Logistics capability: Packaged and configured for container and breakbulk shipment; international export documentation and freight consolidation services can be arranged.

• Price competitiveness: Tiered pricing for volume procurement (MOQ-based), lifecycle cost focus (energy efficiency and reduced maintenance) that improves total cost of ownership compared with cheaper, lower-spec alternatives.

• Sustainability benefits: Reduced energy consumption per ton moved versus centrifugal alternatives for viscous media; options for low-leak seals and containment reduce fugitive emissions and environmental risk.

• Technical support & documentation: Comprehensive OEM manuals, installation guides, maintenance schedules, performance curves, spare parts lists, and on-site commissioning / training services available under service agreements.
  Positioning: This screw pump is a strategic sourcing decision for operators prioritizing predictable throughput, low lifecycle cost, and operational resilience for heavy-oil handling.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20MT

• Loading capacity (MT per container): Typical loading capacity per 20’ container up to 10–12 MT depending on pump size and packing; per 40’ HC container up to 22–24 MT. Exact quantities subject to unit dimensions and packing configuration.

• Lead time: Standard production lead time quoted per order; expedited options available for contract customers (confirm at RFQ).

• Warranty and service: Standard OEM warranty term and extended service contracts available (details on inquiry).

• Packaging & delivery terms: FOB, CIF, DAP negotiable; export-ready packaging included for sea freight.

• Spare parts and consumables: OEM spare kits available and recommended at time of purchase to ensure uptime.