Sundyne LMV 803Lr Ultra-Low NPSHr Direct Drive Pump

The Ultra-Low NPSHr Sundyne API 610 OH3, API 682, ISO 13709, ASME Certified Direct Drive Pump

Sundyne engineers have decades of impeller and inducer design experience. They leveraged that experience and analysis to develop a heavy duty vertical inline centrifugal pump with NPSHr performance that is unparalleled in oil and gas production, midstream and hydrocarbon processing industries. The LMV-803Lr is capable of running ultra-low NPSHr <10 ft (3 m) up and down the curve without losing performance.

The LMV-803Lr is Sundyne’s most robust direct drive pump to date.  A rugged 6×4 casing allows for higher pressures and higher flows. The pump features new inducer technology and a backswept impeller that eliminates low-inlet pressure cavitation.

  • Flows to 800 gpm (182 m³/hr)
  • Heads to 1,030 ft (314 m)
  • Suction Pressure 400 psi (28 bar)
  • Temperature Range -200 to 400°F (-129 to 204°C)


Because the LMV-803Lr has such a low NPSHr rating, it may be installed at grade level eliminating the need of a sump pit.  This also greatly reduces the required skirt height of an elevated tower significantly reducing typical installed costs.

In addition, the vertical configuration of the direct drive line of Sundyne pumps are specifically designed to save valuable space in refineries, NGL production, petrochemical and chemical plants.



  • Bubble point applications (Anes/Enes)
  • Feed pumps
  • Fractionation pumps
  • Booster pumps
  • Bottoms pumps
  • Liquefaction
  • Wash water pumps
  • Reflux pumps
  • Condensate pumps

Proven to be reliable, safe, compact and efficient, Sundyne LMV 803Lr pumps provide a number of operational benefits:

  • Ultra-low NPSHr, <10 ft. (3m) eliminates the need and expense of pump installation in a pit
  • Ultra-low NPSHr significantly reduces the required skirt height of elevated towers
  • Single stage, vertical in-line overhung pump compliant with ISO 13709/API 610 OH3/ASME design
  • Enhanced throat bushing improves seal performance for light hydrocarbon applications
  • Oil mist bearing box design
  • Updated cryogenic design for NGL recovery, ethane, and LNG production & storage
  • Can be installed at grade level greatly simplifying maintenance compared to BB & VS pumps
  • Smaller hydraulic package meets a wider range of process parameters
  • Saves space-25% smaller footprint of competing horizontal pumps
  • API 682 cartridge seal
  • Continuous operation for 5 years with no overhaul
  • Proven inducer technology and backswept impeller eliminates low-inlet pressure cavitation.

US 60 Hz

  • Heads to                                               1,030 ft
  • Flows to                                                   800 gpm
  • Minimum NPSH                              <10 ft
  • Standards                                         API 610 OH3, ISO 13079, ASME
  • Maximum Motor Power                           400 HP
  • Temperature Range                                -200 to 400°F
  • Maximum Allowable Working Pressure       1,000 psig
  • Maximum Suction Pressure                     400 psig
  • Maximum Viscosity                                  750 cP
  • Solids Range                                               0.015″
  • Mounting Configuration                           Vertical
  • Seal Configurations            Single, Double, Tandem-API 682 Cartridge
  • Available Inducer                                     Standard
  • Available Flanges                           600# ANSI RF
  • Suction and Discharge Size          6″ x 4″
  • API Plan                  11, 13, 14, 21, 31, 41, 52, 53, 54

Metric 50 Hz

  • Heads to                                                    314 m
  • Flows to                                                   182 m3/hr
  • Minimum NSPH                                  <3 m
  • Standards                                 API 610 OH3, ISO 13709, ASME
  • Maximum Motor Power                           298 kW
  • Temperature Range                                -129 to 204°C
  • Maximum Allowable Working Pressure       69 bar
  • Maximum Suction Pressure                        28 bar
  • Maximum Viscosity                                 750 cP
  • Solids Range                                          400 microns
  • Mounting Configuration                           Vertical
  • Seal Configurations       Single, Double, Tandem-API 682 Cartridge
  • Available Inducer                                    Standard
  • Available Flanges                           600# ANSI RF
  • Suction and Discharge Size                6″ x 4″
  • API Plans                      11, 13, 14, 21, 31, 41, 52, 53, 54
Part NameStandard BuildMaterial Name
Pump CaseDH316L Stainless Steel
Seal HousingDB316 Stainless Steel
DiffuserDB316 Stainless Steel
Diffuser CoverDB316 Stainless Steel
ImpellerDB316 Stainless Steel
InducerDB316 Stainless Steel
Inducer StudBB4140 Steel
Tab WasherDB316 Stainless Steel
ShimsDJ300 Series Austenitic SS
ShaftDD17-4 PH Stainless Steel
Pump Case StudsBB4140 Steel
Throttle BushingRACarbon
Cartridge SealDB316 Stainless Steel
Seal GuardGLAluminum Alloy
Bearing Box HousingAALow/Medium Carbon Steel
Bearing Box CoverAALow/Medium Carbon Steel
Coupling HousingGCAluminum Alloy
Coupling GuardGCAluminum Alloy

About Sundyne

Sundyne is the world leader in delivering low-flow, high-head, integrally geared centrifugal pumps and compressors, sealless magnetic drive pumps and diaphragm gas compressors. Sundyne’s precision-engineered, highly reliable, safe & efficient pumps and compressors are used in chemical, petrochemical, hydrocarbon, hydrogen, pharmaceutical and industrial applications. Sundyne pumps and compressors are also available in API, ANSI/ASME, ISO, and other industry compliant designs.