Welcome to rotor.zone provider of rotating equipment resources. Check out rotor.zone on the Appstore:

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iPad76 PumpSize - FREE Pump and Pipe Sizing Utilities

gascomp icon iPad76 Gas Compressor Utilities for iPhone (available in English and Russian)

iPad76 Machinery Vibration Guide for iPhone


Q - Why is API 617 referenced [In the Machinery Vibration Guide] for Centrifugal Compressors while all other machine classes reference ISO standards.

A - Reflects industry practice. API 617 is the preferred standard for Centrifugal Compressors and is the most widely referenced for these machines. References to the ISO standards are much more common for other machine classes and accelerometer based measurements.

Q - Why does the pipe size utility make the pipes so big? my (book) tables are always one size smaller.

A - Sizing is based on 7f/s velocity for optimal efficiency. In the past (when energy was cheaper) a figure of 10f/s was commonplace.

Q - Why are imperial units shown as US?

A - Typically this system is used in North America and flow units are specifically in US Gallons rather than imperial gallons.

Q - Will rotor.zone produce Android applications in addition to iPhone?

A - No, for mobile platform rotor.zone is 100% Apple. That said, the site will feature cloud applications which run over the web and could be used on any device

Q - What is Sajaa Gas?

A - Sajaa Gas is gas from the Sajaa field in the Emirate of Sharjah in the United Arab Emirates. In the gas compressor software it is used as a representative for rich field gasses similar to the way Brent and West Texas Intermediate are used for Crude Oil.

Q - What area’s does/will the site cover?

A - Fluid Machinery (Pumps and Compressors) and Machinery Vibration.