GSP OH2 API 685 centerline mounted single stage sealless magnetic drive pump.

- Flows to 3,647 gpm (828 m³/hr)
- Heads to 1,146 ft (350 m)

The GSP OH2 pump has no mechanical seals which are widely regarded as the weakest point in any pumping system. Over 85% of pump failures involve mechanical seal failure and leaks through static seals such as gaskets and O-rings as well as bearing failure. When planning a new pump installation or an upgrade to an existing installation, the financial impact of the mechanical seal support system is considerable. The GSP sealless magnetic drive pump meets all of the requirements of API-685 making it ideal for chemical, petrochemical as well as oil and gas installations. 

Our heavy duty line of API sealless magnetic drive, end suction centrifugal pumps comply with specifications required by the oil, gas, petroleum and heavy chemical industries. The GSP is typically used in toxic, aggressive, hot, crystallizing and high value processes.



Performance Envelope, 60Hz






Heads To  80 to 1,146ft 18 to 245m 60HZ: 25 to 350m
Flows To  1 to 3,647gpm 8 to 662m3/hr 60HZ: 10 to 828m3/hr
Max Power  535 400
Temp Range  -40 to 660°F -40 to 350°C
Number of Stages  1.0
Max Case Working Pressure  580 psi 41 kg/cm2
Max Suction Pressure  580psi (41kg/cm²)
Differential Head  656 ft 200 m
HP Dependent on Diff. Head  535 hp 400 KW
Standard Delivery  12-16 weeks
Speed Range  1,450 to 3,500rpm-60Hz
Materials of Construction  Carbon Steel, 316 SS
Bearing Materials Available SiC, carbon
Hydrotest Pressure  870 psi 61 kg/cm2
Max Viscosity  200 cst
Industry Standard  API 685, API 610 OH2 centerline mounted single stage
Solids Range  maximum of 5% w/w less than 150 micron
Motor Details  Industry standard
Mounting Configurations  Separate Mount
Number of Available Hydraulics... 28.0
Seal Configurations Available  Sealless
Available Inducer  yes
Available Flanges  150#/300# RF
Pump Case Corrosion Allowance  1/8" (3.2 mm)
Suction and Discharge Size  varies based on model

Sealless Centrifugal Pumps API 685
Sealless magnetic drive centrifugal pumps that meet API-685 and API-610 standards. No seals that leak make it safe and reliable. Perfect pumps for difficult to seal, hazardous, and high-value applications for petroleum, heavy duty chemical and gas industry services.

HMD Kontro Sealless Magnetic Drive Pumps
Sundyne HMD-Kontro sealless magnetic drive pumps meet API-685, ASME / ANSI B73.3 and ISO 2858 standards. They do not leak and are extremely reliable and safe.

  • Light Oils
  • Organic Chemicals
  • Bulk Chemicals
  • Solvents
  • Hydrocracking
  • Tank Car Loading
  • Petrochemical Processing
  • Plastics
  • Butane Transfer
  • Booster
  • Benzene Reduction
  • Chlor alkali
  • Battery Manufacturing
  • Fine Chemicals
  • Petroleum Production and Refining
  • Oxygenates Production
  • OEM
  • Gasoline
  • Aromatics
  • Biofuels
  • Acid Transfer
  • Utility
  • Corrosive Services
  • Alkylation
  • Inorganic Chemicals
  • Crude Oil Transfer
  • Toxic Services
  • Flammable Liquids
  • Polysilicon
  • Caustics
  • Biodiesel
  • Tank Car Unloading
  • Heat Transfer Fluids
  • Isomerization
  • Amine Treating
  • Offshore
  • Separation
  • Synthetic Fuels
  • Chemical Transfer
  • Hot Oil
  • Sour Water
  • Bioprocessing
  • Agrochemicals
  • Circulation
  • Chemical Processing
  • Hydrotreating
  • Recycling Services
  • Propane Transfer
  • Edible Oils
  • Sea Water

API American Petroleum Institute
Sundyne has a wide range of heavy duty centrifugal pumps that are compliant with American Petroleum Institute API-610, 10th and 11th Edition (OH1, OH2, OH3, OH4 OH5, OH6, BB1, BB2, BB3, BB5, VS1, VS2, VS4, VS6) and API-685 sealless magnetic drive standards Our customers in the oil refining and petrochemical industries have for years turned to Sundyne pumps for their high-head, low-flow services and other difficult or hazardous applications.

  • Refining
  • Oil and Gas
  • Chemical and Liquor
  • Chemical Processing