API 610 OH2 Process Pump
Horizontal Overhung Single-Stage Centrifugal Pump
API 610 OH2 horizontal overhung single-stage process pump with centerline-mounted casing, designed for general refinery and petrochemical services.
Product Specifications
| Flow Rate | 3 - 600 m³/h |
|---|---|
| Head | 10 - 250 m |
| Power | 5 - 400 kW |
| Speed | 1450 / 2900 rpm |
| Casing Material | Carbon Steel / 316SS / Duplex |
| Impeller Material | 316SS / Duplex / Alloy 20 |
| Max Temperature | 300 °C |
| Max Pressure | 2.5 MPa |
| Seal Type | Mechanical Seal / API Flush Plans |
| Standard | API 610 11th / ISO 13709 |
Product Description
The API 610 OH2 is a horizontally mounted, overhung, single-stage, end-suction, top-discharge centrifugal pump built to API Standard 610 specifications. It features a centerline-mounted casing for thermal stability and is widely used in refinery and petrochemical applications. The OH2 configuration features a centerline-supported casing to handle thermal expansion, a single suction impeller, and a robust bearing housing with back pull-out design for easy maintenance.
Applications
- General refinery services
- Hydrocarbon processing
- Chemical transfer
- Light hydrocarbon pumping
- Petrochemical plants
- Oil & gas production
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 OH2 Overhung Design
Foot-mounted, radially split, single-stage overhung pump per API 610 OH2 type, the most widely specified configuration for refinery process services with flows up to 1,200 m³/h.
Back Pull-Out Maintenance
Complete rotating assembly (impeller, shaft, bearings, seal) removes as a cartridge without disconnecting suction or discharge piping, reducing maintenance downtime to under 4 hours.
Low NPSH Impeller Options
Inducer or large-eye impeller available for low NPSH applications (hot hydrocarbons, volatile liquids), with NPSHr as low as 1.5 m at BEP for high-temperature refinery services.
Material Traceability
All pressure-retaining components supplied with certified material test reports (MTR) per API 610, including chemical composition and mechanical property verification for cast steel, 316L, and duplex materials.
Key Features
Frequently Asked Questions
What does OH2 mean in API 610?
What is the difference between OH1 and OH2?
Can it handle high-temperature hydrocarbons?
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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