Industrial Integrally Geared API Pumps LMV341 High Speed Vertical Centrifugal Pump
Our API 610 OH6 series is a high-speed, integrally geared vertical centrifugal pump designed for precision performance in refinery and petrochemical environments. Engineered as a technical match for the LMV 341 series, this pump excels in high-head, low-flow applications where traditional multi-stage pumps are inefficient.
With a focus on operational reliability and compliance, our OH6 pumps ensure seamless integration into existing systems while providing advanced hydraulic coverage and robust gearbox technology.
Technical Specifications
US Standard (60 Hz)
| Parameter |
Specification |
| Differential Head |
Up to 6,300 ft |
| Flow Rate |
Up to 400 gpm |
| Maximum Motor Power |
400 HP |
| Temperature Range |
-200 to 650 °F |
| Maximum Case Working Pressure |
1,260 psi |
| Maximum Suction Pressure |
2,160 psi |
| Maximum Viscosity |
750 cp |
| Solids Range |
0.015 inch (400 microns) |
| Suction and Discharge Size |
3 x 2 inches |
| Available Flanges |
600# or 900# ANSI RF and RTJ |
Metric Standard (50 Hz)
| Parameter |
Specification |
| Differential Head |
Up to 1,344 m |
| Flow Rate |
Up to 74 m³/hr |
| Maximum Motor Power |
315 kW |
| Temperature Range |
-130 to 340 °C |
| Maximum Case Working Pressure |
151.9 kg/cm² |
| Maximum Suction Pressure |
71 kg/cm² |
| Maximum Viscosity |
750 cp |
| Solids Range |
0.381 mm (400 microns) |
The Performance and Cutaway



Materials of Construction and Build Codes
We offer a range of metallurgy options to meet API 610 material classes (S-5, A-7, S-8), ensuring compatibility with diverse process fluids.
- Pump Case: Carbon Steel or 316 Stainless Steel
- Impeller and Inducer: 316 Stainless Steel
- Diffuser Insert: Carbon Steel or 316 Stainless Steel
- Shaft: 4140 Steel or 15-5PH for low-temperature service
- Seal Faces: Carbon, Silicon Carbide, or Tungsten Carbide
- API Flush Plans: Supports Plans 11, 12, 13, 21, 23, 31, 32, 41, 52, 53, 54, 61, 62
Key Performance Advantages
API 610 OH6 Compliance
Fully compliant with the latest API 610 standards for integrally geared pumps, ensuring safety and reliability in hazardous industrial zones.
Optimized NPSH with Inducer Technology
Available inducers significantly lower the Net Positive Suction Head required (NPSHr), protecting the pump from cavitation during volatile fluid handling.
Compact Vertical Design
The vertical inline configuration saves valuable floor space and simplifies piping layouts compared to horizontal multi-stage alternatives.
Drop-in Replacement Capability
Designed with matching 3 x 2 inch dimensions and flange ratings, this series serves as a direct technical alternative to LMV 341 installations, minimizing downtime during upgrades.
Technical Questions and Answers
Is this pump a direct alternative for the Sundyne LMV 341?
Yes. Our OH6 series is engineered to match the hydraulic performance and mounting dimensions of the LMV 341, allowing for a streamlined transition without major piping modifications.
How does the pump handle cryogenic or high-temperature fluids?
By utilizing different build codes, such as Build O for temperatures down to -240 °F, we employ specialized materials like 15-5PH shafts and 316 SS cases to ensure structural integrity across a wide thermal range.
What sealing options are available for hazardous hydrocarbons?
We provide Single, Double, and Tandem seal configurations. These are paired with various API Flush Plans (such as Plan 52 or 53) to ensure secondary containment and seal cooling for dangerous fluids.
Can the pump performance be adjusted if process conditions change?
Yes. The modular design features replaceable diffuser inserts and impellers, allowing the pump to be re-rated for new flow or head requirements without replacing the entire unit.