API 610 OH6 Equivalent Pump Alternative Sundyne LMV 341 OH6 Integrally Geared Pump
Our API 610 OH6 series is a high-speed, integrally geared vertical centrifugal pump specifically engineered as a precision-matched alternative to the Sundyne LMV 341. Designed to master high-head, low-flow process requirements, this series provides a drop-in solution for refineries and petrochemical plants seeking reliable performance with improved lead times and technical support.
As a fully compliant API 610 OH6 equivalent, this pump utilizes advanced gearbox technology to reach extreme pressures in a single stage, ensuring it meets the most rigorous industrial standards for hydrocarbon and chemical processing.
Technical Specifications (60 Hz / 50 Hz Comparison)
| Feature | US Standard (60 Hz) | Metric Standard (50 Hz) |
|---|
| Max Differential Head | 6,300 ft | 1,344 m |
| Max Flow Rate | 400 gpm | 74 m3/hr |
| Max Motor Power | 400 HP | 315 kW |
| Temperature Range | -200 to 650 °F | -130 to 340 °C |
| Max Case Working Pressure | 1,260 psi | 151.9 kg/cm2 |
| Max Suction Pressure | 2,160 psi | 71 kg/cm2 |
| Max Viscosity | 750 cp | 750 cp |
| Solids Range | 0.015" (400 microns) | 0.381 mm (400 microns) |
| Suction & Discharge Size | 3" x 2" | 3" x 2" |
| Available Flanges | 600# / 900# ANSI RF & RTJ | 600# / 900# ANSI RF & RTJ |
Material Build Integrity (API 610 Classifications)
| Component | S-5 Build (C.S.) | A-7 / S-8 Build (316 SS) |
|---|
| Pump Case | Carbon Steel | 316 Stainless Steel |
| Impeller & Inducer | 316 Stainless Steel | 316 Stainless Steel |
| Diffuser Insert | Carbon Steel / 316 SS | 316 Stainless Steel |
| Shaft | 4140 Steel / 15-5 PH | 4140 Steel / 15-5 PH |
| Seal Faces | Carbon / Silicon Carbide | Silicon Carbide / Tungsten Carbide |
| API Flush Plans | Plans 11, 13, 21, 31, 32 | Plans 52, 53, 54, 61, 62 |
The Performance and Cutaway



Core Advantages as an LMV 341 Alternative
- Dimensional Interchangeability: Our OH6 series is designed with the same 3 x 2 inch nozzle sizes and flange orientations, allowing it to function as a drop-in replacement for existing Sundyne LMV 341 piping layouts without costly modifications.
- Enhanced NPSH Performance: Equipped with specialized inducer technology, our pumps drastically reduce NPSH requirements. This makes them an ideal equivalent for volatile or low-boiling-point liquids where cavitation is a risk.
- Optimized High-Speed Gearbox: The integrally geared design replicates the high-RPM efficiency of the LMV series, providing the same hydraulic curve while utilizing a modular design that simplifies seal and bearing maintenance.
Technical FAQ: Alternative Sundyne Solutions & Concerns
Will this pump fit into my existing Sundyne LMV 341 footprint without modifying the piping?
Yes. One of the primary design goals for our API 610 OH6 alternative is dimensional interchangeability. The suction and discharge centerlines, flange ratings, and mounting bolt patterns are designed to match the original LMV 341, ensuring a true "drop-in" replacement experience.
How do I know the performance curve will match my specific duty point?
Every pump is custom-engineered and tested. We use precision-machined diffusers and impellers to replicate the specific Head vs. Flow curve of your original pump. We provide full performance test reports as per API 610 standards to verify the duty point before shipping.
Are your internal components and wear parts compatible with original Sundyne units?
While our pump is a complete functional equivalent, we maintain high-precision manufacturing that allows many critical wear parts (such as seals and specific gearbox bearings) to meet the same specifications. For specific component interchangeability, please provide your original build code for verification.
How can you ensure the same level of reliability as the original OEM?
Reliability is built into our API 610 compliance. We use equivalent or superior metallurgy (such as 15-5 PH shafts and Tungsten Carbide seal faces) and conduct rigorous gearbox vibration and temperature testing. Our units are designed for the same 20-year service life and 3-year uninterrupted operation as required by API standards.
What happens if I need technical support or spare parts in the future?
This is where our alternative solution excels. We maintain a robust inventory of critical components (impellers, diffusers, seals, and gaskets) with significantly shorter lead times than original OEMs. Our technical team is available for remote or on-site support to ensure your process remains online.
Is the gearbox maintenance the same as the Sundyne model?
Yes. The maintenance procedures for the speed-increasing gearbox, including oil changes and bearing inspections, are virtually identical. We provide comprehensive O&M manuals that will be familiar to any technician experienced with integrally geared high-speed pumps.