Marelli VS1 vertical, radially split case, submersible centrifugal process pump

The vertical suspended centrifugal pumps are designed for pumping fluids on heavy duty process applications.

The FG pump is fully compliant with API-610 11th Edition VS1 and ISO 13709 standards. The pump assembly is partially submerged so the pump does not need priming before operation.  The drive unit is located above ground level and is completely accessible.

The pump is composed of four components: bowl assembly, column, discharge head and drive unit.

  • Flows to 13,209 USgpm (3,000 m³/hr)
  • Heads to 1,150 ft (350 m)
  • Maximum Working Pressure 189 psi (13 bar)
  • Temperature Range -22 to 482°F (-30 to 250°C)
  • Pit Depths to 40 ft. (12m)


  • Refineries
  • Desalination plants
  • Process charge
  • API Basins
  • Condensate extraction
  • Tank farms
  • Tanks fluid transfer
  • Petrochemical plants
  • Fertilizers
  • Oil fields and terminals
  • Off-shore and on-shore installations for petroleum and gas
  • Reverse osmosis
  • Synfuels
  • Paper Mills
  • Other intensive heavy duty services

Marelli has more than 50 years of experience in centrifugal pump design, development, manufacturing and service around the world.  Vertical suspended centrifugal pumps are a core product family developed under API610/ISO 13709, latest edition standards.

All FG vertical pumps are designed for heavy duty process fluids. The pump assembly is partially submerged, so that the pump does not need priming before operation. The drive unit is located on the surface and is completely accessible. The pump is composed of four components: bowl assembly, column, discharge head and drive unit.  The Marelli line of vertical pumps offer a wide range of solutions matched to a wide spectrum of applications.

US 60 Hz

  • Heads to                                                  1,150 ft
  • Flows to                                                  13,209 USgpm
  • Standards                                               API 610, VS1 Type
  • Temperature Range                                -22 to 482°F
  • Maximum Working Pressure                  189 psi
  • Differential Head                                      656 ft
  • Mounting Configuration                           Vertical Suspended

Metric 50 Hz

  • Heads to                                                  350 m
  • Flows to                                                   3,000 m3/hr
  • Standards                                                ISO 13709
  • Temperature Range                                -30 to 250°C
  • Maximum Working Pressure                13 bar
  • Differential Head                                      200 m
  • Mounting Configuration                         Vertical Suspended
Pressure CasingCarbon Steel (A216 WCB)12% CHR316 AUSDuplex
ImpellerCast IronCarbon Steel12% CHR316 AUS12% CHR316 AUSDuplex
Wear RingsCast Iron12% CHR HardenedHard-faced 316 AUS12% CHR HardenedHard-faced 316 AUSHard-faced Duplex
ShaftCarbon SteelAISI 4140316 AUS12% CHR316 AUSDuplex
Bearing HousingCarbon Steel (A216 WCB)
Base GasketAUS, Spiral Wound316 AUS Spiral WoundAUS, Spiral Wound316 AUS, Spiral WoundDuplex SS Spiral Wound

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, carbon capture, renewable fuels, power generation and industrial applications. Sundyne pumps and compressors are available in API, ANSI/ASME, ISO, and other industry compliant designs.