ANSI/HI Rotodynamic Pumps for Vibration Measurements and Allowable Values. New in this Standard: Recommended default initial field alarm and trip settings are now referenced in ANSI/HI Rotodynamic Pumps – Guideline for. Hydraulic Institute Standards: ANSI/HI Covers Horizontal and Vertical. Centrifugal Pumps. Recommends use of RMS velocity.

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Circulation Water Pumps Exceed ANSI HI 9.6.4 Vibration Limit

Before any modifications were made, the plant decided to perform a trim balance, which MSI suggested would not work, 99.6.4 it did not. Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Hydraulic Institute HI is the largest association of pump producers and suppliers to the pump industry in North America and is a global authority on pumps and pumping systems.

Some amount of bracing or stiffening should help. HI Pump Standards are reliable, widely accepted references for anyone involved in 9.6., including users, consultants, contractors, construction firms, manufacturers of pumps, seals, motors, instrumentation, controls, and pump software developers and systems integrators. Fordelene med et abonnement:.

HI 9.6.4-2009

Such issues are the result of project complexity, size, uniqueness and regulation, as well as the need for virtual team collaboration. Toggle navigation Toggle search. HI periodically introduces new Standards based on industry needs. Modifications made to fix the vibration problem. The allowable vibration requirements have been updated to reflect acceptable performance both for field and factory tests, based on hundreds of data points obtained in surveys conducted since the publication of the previous edition.

Additional requirements have been added for operational speeds rpm and lower. Red Flag This Post Please let us know here why this post is inappropriate. I’ve been on both sides of that process, and I don’t envy you if you can’t get some relief. Pump volutes are by nature flexible due to open curvatures, and are often the main part of the structure.


Site designed by newmedia. This is an empirical method based on the test data available from sources throughout the world. NOK 1 ,00 eks.

Circulation Water Pumps Exceed ANSI HI Vibration Limit – Mechanical Solutions

Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. The HI method enables pump users and designers to estimate performance of a particular rotodynamic pump on liquids of known viscosity, given the performance on water. The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs.

The revised allowable values have been compared with those presented by other standards organizations, including ISO and API, and can be considered as commensurate.

HI publishes rotodynamic pumps for vibration standard

Spud says; Meticulous effort and willingness to learn are honorable traits. Join your peers on the Internet’s largest technical engineering professional community. Metric units anei now primary, with US customary units secondary. Finite element model mesh.

One of the cookies we use is essential for parts of the site to operate properly. Finite element qnsi plot of resulting mode shape after modification.

I’d be interested in how many other vertical pump installations the consultant has worked on, and how the acceptance process went. Currently Not Seeking Members. Using Orbits for Condition Monitoring. This standard is based on experiences from pump users and manufacturers as well as vibration measurements ji many companies.

Blade pass for a 3 bladed impeller starts anzi approach some parity. I have a consultant engineer specifying the following vibration criteria for canned vertical turbine pumps: Balancing Rigid Rotors in the Field.


Problem Statement Challenge What type of machine: It pertains to evaluation of vibration when the vibration measurements are made on non-rotating parts bearing housing vibration.

It pertains to 96.4 of vibration when the vibration measurements are made on nonrotating parts bearing housing vibration. To learn more, see our Privacy Policy. It describes the benefits to pump longevity when the net positive suction head NPSH available is greater than the NPSH required by a suitable margin, and suggests anis for specific applications.

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For more information about the Hydraulic Institute, its member companies and Standards Partners, visit www. The Eng-Tips staff will check this out and take appropriate action. Tuned absorbers and slight stiffness re-tuning can aansi slick, but only for single speed pumps.

The vibration levels were just below specification requirement upon installation, but over time, the vibration increased by almost a factor of Click Here to join Eng-Tips and talk with other members!

For speeds above rpm, the measurement quantity to be used for measuring the vibration of nonrotating parts of rotodynamic pumps is velocity in millimeters per second RMS or inches 9.64.

second RMS. Forside Nettbutikk Produktkatalogen Produktpresentasjon. It describes the effects of operating a znsi pump at rates of flow that are greater or less than the rate of flow at the pump’s best efficiency point BEP. I accept cookies from this site. The Next Generation of Vibration Techniques.