ISO 4391:1983 PDF

Name: ISO 4391:1983 — Hydraulic fluid power — Pumps, motors and integral transmissions — Parameter definitions and letter symbols
SKU: ISO 4391:1983
Price: 25 EUR
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Hydraulic fluid power — Pumps, motors and integral transmissions — Parameter definitions and letter symbols

Название (английский):

ISO 4391:1983

Hydraulic fluid power — Pumps, motors and integral transmissions — Parameter definitions and letter symbols

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 1 июня 1983 г.
Издание:: ISO IS 4391 edition 2 version 1
ICS:: 23.100.10

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Описание (английский):

Describes and systematically defines the principal technical characteristics, and allots letter symbols to these characteristics, and indicates how they can be more clearly defined by suffixes corresponding to particulate cases. Lists also an analysis of parameter dimensions. Gives examples for the use of symbols with suffix, and includes definition of terms without symbols.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 4391:1983 - "Hydraulic fluid power - Pumps, motors and integral transmissions - Parameter definitions and letter symbols" standardizes the principal technical characteristics, letter symbols and suffixes used to describe hydraulic pumps, motors and integral variable-speed transmissions. It provides a systematic list of parameter definitions, dimension analysis and practical examples to ensure unambiguous communication in documentation, test reports and catalogues.

Key topics

Parameter definitions and dimensions: Clear definitions for pressure, flow (theoretical and effective), torque, power (hydraulic, pump, motor), swept volumes (geometric, effective, derived), moments of inertia, losses (volumetric internal/external, compressibility) and temperatures.

Letter symbols: Alphabetical set of Latin and Greek letters assigned to each characteristic (e.g., P for pressure, qv for volume flow rate, T for torque).

Suffix system: Standard suffixes (for ambient am, hydraulic h, mechanical m, dry, external ex, rated/norminal conditions, peak P, etc.) and priority rules to combine suffixes and avoid proliferating symbol variants. Suffixes 0, 1, 2 identify inlets/outlets where needed.

Guidelines and examples: Rules for using symbols in equations, when to prefix unit type (P, M, T), combining multiple suffixes, and worked examples for pumps, motors and integral transmissions.

Identification statement: Recommended wording for declaring compliance in technical literature and test reports.

Cross-references: Links to ISO 1219 (graphical symbols), ISO 5598 (vocabulary) and ISO 31 series (quantities and units).

Practical applications

ISO 4391 helps professionals create consistent, machine- and human-readable technical content:

Designers & engineers use these symbols and definitions in calculations, performance curves and specification sheets to avoid ambiguity when sizing or comparing components.

Manufacturers & catalogs adopt standard letter symbols and suffixes for product datasheets, labels and marketing materials so customers can compare products reliably.

Test laboratories & quality teams report measured parameters (flow, pressure, torque, losses) using the standardized notation for unambiguous test reports.

Procurement & systems integrators reference rated and limiting conditions (inlet/outlet pressures, peak duty, rated power) to specify components for systems reliably.

Standards writers & technical authors harmonize terminology with ISO 1219 and ISO 5598 for consistent documentation across fluid power standards.

Related standards

ISO 1219 - Fluid power systems and components - Graphical symbols

ISO 5598 - Fluid power systems and components - Vocabulary

ISO 31 series - Quantities, units and dimensions

Using ISO 4391 supports clearer communication of hydraulic parameters, reduces specification errors, and improves interoperability across pumps, motors and integral transmissions in hydraulic fluid power systems. Keywords: ISO 4391, hydraulic fluid power, pumps, motors, integral transmissions, parameter definitions, letter symbols, hydraulic parameters.

ISO 4391:1983 PDF

Abstract

Похожие стандарты

Overview

Key topics

Practical applications

Related standards

Технические детали

BS ISO 1219-3:2016

Fluid power systems and components. Graphical symbols and circuit diagrams. Symbol modules and connected symb…

ISO 5598:1985

Fluid power systems and components — Vocabulary

BS ISO 3108:2017

Steel wire ropes. Test method. Determination of measured breaking force.

SIST ISO 4391:1995

Hydraulic fluid power -- Pumps, motors and integral transmissions -- Parameter definitions and letter symbols