ISO 14694-2003 PDF

Full title and description

ISO 14694:2003 — Industrial fans — Specifications for balance quality and vibration levels. This International Standard defines balance-quality classes for fan impellers and operational vibration acceptance limits for industrial fans, and gives requirements and measurement principles for factory and in-service vibration assessment of fans.

Abstract

ISO 14694:2003 specifies acceptable residual unbalance (balance quality) for fan impellers and sets limits for vibration levels of complete fan units in operation. It applies to centrifugal, axial and mixed-flow industrial fans (except fans designed solely for simple air circulation such as ceiling or table fans), and gives guidance on measurement points and interpretation of results. For fans with power above the stated limits the standard refers to applicable ISO vibration standards (for example ISO 10816).

General information

• Status: Published (International Standard; edition 1 confirmed under systematic review).
• Publication date: 2003 (edition published March 2003).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: Industrial machinery and fans (examples from registry: 23.120; 21.120.40 / related listings also show 17.160, 23.120).
• Edition / version: Edition 1 — ISO 14694:2003 (with Amendment AMD 1:2010 recorded).
• Number of pages: 39 pages (standard document length as published).

Scope

Defines balance-quality categories for impellers (residual unbalance limits) and operational vibration acceptance criteria for industrial fans of various types and sizes. The standard excludes design of foundations and installation practices (foundation/installation are expected to provide support to meet vibration criteria) and excludes small fans intended only for air circulation; it also notes application limits with reference to other vibration standards for very high-power fans.

Key topics and requirements

• Balance-quality (BV) classes for impellers with procedures to calculate permissible residual unbalance.
• Operational vibration (FV) acceptance limits for complete fan units and guidance on measurement points and directions.
• Guidance on factory balancing tests and in-situ vibration measurements, including interpretation of results and acceptance criteria.
• References/links to related vibration standards (for example ISO 10816 for higher-power machines and ISO 1940 principles for rotor balance).
• Statement that foundation design and installation practice are outside the standard’s prescriptive scope (these affect final vibration outcomes).

Typical use and users

Used by fan manufacturers, vibration and rotating-equipment engineers, testing laboratories, plant maintenance teams, procurement specialists specifying acceptance tests, and consultants involved in commissioning and diagnostic testing of industrial fans. The standard supports specification of acceptance criteria during purchase and factory testing as well as troubleshooting and vibration monitoring programs.

Related standards

Commonly used alongside ISO 10816 (vibration severity and evaluation of machine vibration), ISO 1940 (balance quality of rotors) and other fan/rotating-equipment guidance and national adoptions (examples: AMD 1:2010 amendment to ISO 14694 and national standards/transpositions).

Keywords

industrial fans; balance quality; impeller unbalance; vibration limits; BV categories; FV limits; rotor balancing; vibration measurement; acceptance testing; rotating machinery.

FAQ

Q: What is this standard?

A: ISO 14694:2003 is an ISO International Standard that specifies balance-quality classes for fan impellers and operational vibration acceptance limits for industrial fans.

Q: What does it cover?

A: It covers allowable residual unbalance of impellers, vibration-limit categories for complete fan units, measurement points and methods, and factory/in-service testing guidance; it excludes foundation design and simple air-circulation fans.

Q: Who typically uses it?

A: Fan manufacturers, commissioning and maintenance engineers, vibration analysts, test laboratories and procurement/specification teams use it to set balancing and vibration acceptance criteria.

Q: Is it current or superseded?

A: The published edition is ISO 14694:2003 (Edition 1). According to ISO records this edition has been subject to systematic review and confirmation activity and remains published; an amendment (AMD 1:2010) is recorded. Users should check the ISO catalogue or national standards body for the absolute current status before relying on it for procurement or regulatory compliance.

Q: Is it part of a series?

A: It is not a numbered multi-part series but it is closely associated with other rotor/vibration standards such as ISO 1940 (balance quality) and ISO 10816 (vibration severity), and it was produced by ISO technical committee work related to fans and rotating machinery.

Q: What are the key keywords?

A: Balance quality, BV categories, vibration limits, FV categories, industrial fans, rotor balancing, vibration measurement, acceptance criteria.