Process Pump Type OHM: With Magnetic Drive
Process pumps used in refineries and chemical plants routinely handle hazardous fluids that are flammable, toxic and corrosive at high pressures and extremes of temperature. They are subjected to continual operation in these aggressive conditions and are not expected to fail. Three years of continuous operation and a design life of twenty years are mandated.
The type OHM overhung process pump includes the latest in sealless pump technology. It is a horizontal, single-stage, radial-split, centerline mounted pump with a high-efficiency magnetic coupling. It is a hermetically sealed system, including a secondary containment with a dry running safety seal. The bearings are product-lubricated. Due to the modular system, some elements are interchangeable with the type OHH range. The pump is fully compliant with API 610, 9th edition, and API 685.
OHM pumps are driven through a magnetic coupling, thus eliminating the need for a mechanical seal and the associated maintenance. The pumps are employed wherever environmentally sensitive or hazardous liquids - such as acids, solvents, hydrocarbons or other aggressive, explosive, toxic or valuable fluids - must be pumped without any risk of leakage. The only monitoring equipment needed is for temperature, pressure, leakage and vibration.Rapid Design and Validation Techniques
For the first time on an entire consolidated product range, Sulzer has used the innovative techniques available from 3D CAD/CAM throughout all aspects of design and development. Starting with existing recognized hydraulic designs and proven performances, it was necessary to identify any possible "holes" in the available hydraulic coverage. The target being to enable the customer to select a pump to operate within 80 to 110 % of its best-efficiency point for any head and flow point within the performance range. The need for any modified, scaled or newly designed pump performance was thus established. Hydraulic geometries were created and defined in three dimensions, using Sulzer's own "Volute" and "Impeller" design programs. Designs were checked for conformance, using computational fluid dynamic (CFD) studies. The completed designs were then imported, using proprietary Unigraphics software and configured into fully featured solid models suitable for both the direct CNC manufacturing processes and the creation of two-dimensional detail drawings. Components for hydraulic development testing were manufactured directly from these solid models.
In taking this approach, it can be assured that all hydraulic performances have been validated prior to release for sale: either from full size pump tests on previous product lines or from the comprehensive qualification test program performed on newly developed performances at Sulzer's hydraulic test laboratory.
Global Supply Chain
The benefits of a fully integrated global supply chain will be proven out with the introduction of the widely improved product range during Spring 2002. Sulzer Pumps' modern and well-equipped manufacturing facility operating in Mexico City will provide the focal point for supply of all "bare shaft" pumps. These pumps will be "delivered to order" into other packaging facilities within Europe, North America and South America. From there, they will be mounted with baseplate, piping, motor and all other auxilliary equipment, prepared for final customer inspection and shipped to site.
The type OHM overhung process pump includes the latest in sealless pump technology. It is a horizontal, single-stage, radial-split, centerline mounted pump with a high-efficiency magnetic coupling. It is a hermetically sealed system, including a secondary containment with a dry running safety seal. The bearings are product-lubricated. Due to the modular system, some elements are interchangeable with the type OHH range. The pump is fully compliant with API 610, 9th edition, and API 685.
OHM pumps are driven through a magnetic coupling, thus eliminating the need for a mechanical seal and the associated maintenance. The pumps are employed wherever environmentally sensitive or hazardous liquids - such as acids, solvents, hydrocarbons or other aggressive, explosive, toxic or valuable fluids - must be pumped without any risk of leakage. The only monitoring equipment needed is for temperature, pressure, leakage and vibration.
Rapid Design and Validation Techniques
For the first time on an entire consolidated product range, Sulzer has used the innovative techniques available from 3D CAD/CAM throughout all aspects of design and development. Starting with existing recognized hydraulic designs and proven performances, it was necessary to identify any possible "holes" in the available hydraulic coverage. The target being to enable the customer to select a pump to operate within 80 to 110 % of its best-efficiency point for any head and flow point within the performance range. The need for any modified, scaled or newly designed pump performance was thus established. Hydraulic geometries were created and defined in three dimensions, using Sulzer's own "Volute" and "Impeller" design programs. Designs were checked for conformance, using computational fluid dynamic (CFD) studies. The completed designs were then imported, using proprietary Unigraphics software and configured into fully featured solid models suitable for both the direct CNC manufacturing processes and the creation of two-dimensional detail drawings. Components for hydraulic development testing were manufactured directly from these solid models.
In taking this approach, it can be assured that all hydraulic performances have been validated prior to release for sale: either from full size pump tests on previous product lines or from the comprehensive qualification test program performed on newly developed performances at Sulzer's hydraulic test laboratory.
Global Supply Chain
The benefits of a fully integrated global supply chain will be proven out with the introduction of the widely improved product range during Spring 2002. Sulzer Pumps' modern and well-equipped manufacturing facility operating in Mexico City will provide the focal point for supply of all "bare shaft" pumps. These pumps will be "delivered to order" into other packaging facilities within Europe, North America and South America. From there, they will be mounted with baseplate, piping, motor and all other auxilliary equipment, prepared for final customer inspection and shipped to site.
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