API 610 VS4 Vertical Sump Pump
Vertically Suspended Single-Casing Wet-Pit Pump
API 610 VS4 vertically suspended, single-casing, wet-pit pump designed for sump service in refineries, petrochemical plants, and offshore platforms.
Product Specifications
| Flow Rate | 5 - 800 m³/h |
|---|---|
| Head | 10 - 200 m |
| Power | 3 - 250 kW |
| Speed | 1450 / 2900 rpm |
| Casing Material | Carbon Steel / 316SS / Duplex |
| Impeller Material | 316SS / Duplex / High Chrome |
| Max Temperature | 200 °C |
| Max Pressure | 2.5 MPa |
| Seal Type | Mechanical Seal / Packing |
| Standard | API 610 11th / ISO 13709 |
Product Description
The API 610 VS4 is a vertically suspended, single-casing, wet-pit centrifugal pump built to API Standard 610 specifications. It is designed for immersion in sumps or pits, eliminating the need for priming and providing reliable operation with varying liquid levels. The VS4 features a vertical shaft with line shaft bearings, a suction bell at the bottom, and a discharge flange above the mounting plate. Optional jacketed discharge columns are available for high-temperature or crystallizing services.
Applications
- Refinery sumps
- Oily water collection
- Stormwater drainage
- Cooling tower basins
- Process sumps
- Offshore platforms
Quality Assurance
All pumps are manufactured under ISO 9001 quality management system. Each pump undergoes rigorous testing including hydrostatic pressure test, performance test, NDT inspection, and dynamic balance verification before shipment. We provide comprehensive documentation including test reports, material certificates, and operation manuals.
Why Choose Our API 610 Process Pumps
API 610 VS4 Vertical Sump
Vertically suspended, single-stage overhung pump per API 610 VS4 type, with submerged impeller for below-grade sump and tank service in refineries and chemical plants.
Customizable Shaft Length
Shaft lengths from 1 to 6 meters available, with line shaft bearings lubricated by product or external flush. Designed for specific pit depth without modification.
No Priming Required
Impeller operates below liquid level, eliminating priming problems and NPSH limitations associated with horizontal pumps in underground sump applications.
Corrosion-Resistant Construction
316L, duplex, or fluoroplastic lined wetted parts for corrosive sump service, with optional vapor seal to prevent toxic vapor escape along the shaft.
Key Features
Frequently Asked Questions
What sump depth can this pump handle?
Is priming required?
Can it handle abrasive liquids?
Selection Guide
✅ When to Choose This Pump
- Refinery and petrochemical process service
- High-temperature (above 150C) hydrocarbon pumping
- Critical service requiring API 610 compliance
- High-pressure injection and transfer duties
⚠️ When NOT to Choose
- Low-pressure water utility service (over-specified)
- Strong acids requiring fluoroplastic lining
- Solids-laden slurries (requires slurry pump)
- Below-grade sump applications (use vertical sump)
💡 Common Selection Mistakes
- Ignoring NPSH calculation for hot hydrocarbons
- Using single seal for toxic/flammable service
- Not specifying centerline mounting for >150C
- Under-sizing motor for specific gravity >1.0
Still unsure? Use our Pump Selection Center → or talk to our engineers →
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