To further educate and assist users and specifiers of pumps and related equipment, the Hydraulic Institute (HI) has introduced three new standards for centrifugal pumps regarding the areas of horizontal baseplate design, allowable operating region, and polymer materials.
Containing information never available before, these new criterion have been established with considerable input from both pump users and manufacturers, in accordance with American National Standard Institute guidelines. As part of a mutual cooperation agreement between HI and EUROPUMP, the new standards have also been reviewed by EUROPUMP members.
"Following standards helps eliminate the possible misunderstandings between the manufacturer, the purchaser, and/or user, and also assists the purchaser in selecting and obtaining the proper product for a particular need," said John H. Doolin, technical affairs manager for HI. HI plans to introduce two more standards in early 1998 and is also in the process of updating its existing 13 standards, which are reexamined every five years.
Specifying Baseplate Design
The standard for horizontal baseplate design establishes the minimum technical design criteria to be used in creating horizontal centrifugal pump baseplates, which includes dimensioning, tolerancing, working stresses and stiffness.
"The purpose of the baseplate is to provide a foundation under a pump and its driver that maintains alignment between the two – and alignment is key," explained Doolin. "Accordingly, the baseplate must serve a number of critical functions. For instance, it must allow for initial mounting and alignment of equipment, survive handling during transportation to the installation site, be capable of being installed properly with minimum difficulty, allow final alignment of the mounted equipment, and allow removal and reinstallation of equipment. Complying with these design criteria, in conjunction with following proper installation procedures, will contribute significantly to meeting functional requirements."
Comparing Polymer Materials
The standard on polymer materials for pumps is a unique compilation of information on ten different polymer materials and their ability to handle over 150 different liquids. According to Doolin, this information is approved as an American standard and has never before been available from a single source.
Any pump user of chemicals or corrosive liquids will find this new standard to be particularly useful.
Included within the description of non-metallic materials used in industrial pump construction is an extensive table of pumped liquids versus the non-metallic construction materials that have been used to pump such liquids. Maximum operating liquid temperatures are also provided.
Setting Allowable Operating Region
This document defines the "Preferred Operating Region" (POR) and the "Allowable Operating Region" (AOR) for centrifugal pumps. A detailed discussion is included on the effect of the following factors on the life of the pump:
"This particular standard is a milestone treatise on the problems which arise when operating centrifugal pumps outside of their allowable operating region," noted Doolin. "Again, this information has never before been compiled by pump producers or published as an American standard. It will prove to be invaluable information across all industries."
The Hydraulic Institute is an 80-year old, national, not-for-profit trade association of 75 pump manufacturers, dedicated to excellence in engineering, manufacturing and application of pumps and pumping equipment. It is also one of the first 44 Charter Partners in the Department of Energy’s Motor Challenge Program. Recognized as the single reference in North America for comparative data of pump types and applications, HI standards contain information unavailable from other sources. In fact, based on user surveys, HI has found that over 80 percent of all pump tests conducted were specified using the Institute’s standards.
HI standards, which are all ANSI-approved, are available as a complete set, in separate pump-type sets, and as individuals documents. For quick and easy access, HI recently introduced its standards on CD-ROM. To order, call (888) 786-7744 toll-free in the United States, or (973) 267-7772. Requests may also be faxed to (973) 267-9055 or mailed to Hydraulic Institute, 9 Sylvan Way, Parsippany, NJ 07054-3802.
The 89-year old Hydraulic Institute, the largest association of pump producers in North America, is a global authority on pumps and pumping systems. Information on the Hydraulic Institute, its services, standards, publications and meetings, can be found on the HI websites at www.Pumps.org and www.PumpLearning.org, and the new energy-savings and life cycle cost focused site, www.PumpSystemsMatter.org. Requests may also be faxed to (973) 267-9055 or mailed to: Hydraulic Institute, 9 Sylvan Way, Parsippany, NJ 07054.