OHH - the next generation of process pumps

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.Industry standards and specifications that describe customer requirements for the heavy-duty centrifugal pumps used in these environments have typically been published by each of the major oil companies. Many of them have derived their own company specifications from those published by the American Petroleum Institute (API):

• API Standard 610 (centrifugal pumps),
• API Standard 682 (shaft sealing systems),
• API Standard 685 (sealless centrifugal pumps)

Over the last five years, there has been a major effort by internationally recognized standards committees to consolidate these API Standards and have them published as ISO Standards. Expectations are that this allows the consistent specification and supply of such equipment wherever in the world it may be purchased and manufactured.

Global Expertise, Local Input

With industry consolidation as the catalyst, Sulzer Pumps has taken technical and manufacturing expertise from all regions of the world and combined this into one centrally co-ordinated project team effort. The team was able to consolidate the best features of several successful and proven existing products into one comprehensive overhung process pump product range. Sales and marketing members of the team have additionally gathered the locally expressed customer requirements.
The result is the widest customer choice on the market, designed and manufactured to the latest technologies. All commonly specified performances, features and options have been consolidated into a product range of over 110 performances.

Process Pump Type OHH

The type OHH overhung process pump includes the latest in mechanical seal technology and is used in heavy-duty refinery services, petrochemical plants, gas processing, coal processing and offshore services. It is a horizontal, single-stage, radial-split, centerline mounted heavy-duty process pump, designed and manufactured in full compliance with the requirements of API Standard 610, 9th edition. The mechanical seals and auxiliaries supplied are in full compliance with the requirements of API Standard 682, 2nd edition. The fluids pumped include water, gasoline, light hydrocarbons (propane, etc.), and crude oil fractionator bottoms.
The customer benefits from the robust construction, the versatility in application, and the long reliable service life. A wide performance range provides for an optimized hydraulic fit for all operating points within the preferred operating range, thus ensuring operation within close proximity to the best-efficiency point.

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 ancillary equipment, prepared for final customer inspection and shipped to site.

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