ISO 7790:2013
(Main)Hydraulic fluid power - Four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08 and 10 - Clamping dimensions
Hydraulic fluid power - Four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08 and 10 - Clamping dimensions
ISO 7790:2013 specifies clamping dimensions of four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08, and 10, on mounting surfaces. The dimensions and sizes conform to ISO 4401 so as to ensure interchangeability of these valves and to reduce the number of fixing devices to be used. It applies to clamping dimensions of four-port modular stack valves and four-port directional control valves which represent current practice. They are generally applicable to industrial equipment.
Transmissions hydrauliques — Appareils empilables et distributeurs à quatre orifices, de tailles 02, 03, 05, 07, 08 et 10 — Dimensions de montage
L'ISO 7790:2013 prescrit les dimensions de montage des appareils empilables et des distributeurs à quatre orifices, de tailles 02, 03, 05, 07, 08 et 10, sur plans de pose. Les dimensions et les tailles sont conformes à l'ISO 4401 afin d'assurer l'interchangeabilité de ces appareils et de réduire le nombre de modes de fixation à utiliser. Elle est applicable aux dimensions de montage courantes des appareils empilables et distributeurs à quatre orifices, dimensions qui sont généralement applicables aux équipements industriels.
General Information
- Status
- Published
- Publication Date
- 25-Feb-2013
- Technical Committee
- ISO/TC 131/SC 5 - Control products and components
- Drafting Committee
- ISO/TC 131/SC 5/WG 2 - Hydraulic control products
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 11-Apr-2024
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 18-Dec-2008
Overview
ISO 7790:2013 - "Hydraulic fluid power - Four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08 and 10 - Clamping dimensions" - defines the mounting (clamping) dimensions for four‑port directional control valves and modular stack valves on mounting surfaces. The standard aligns dimensions and sizes with ISO 4401 to ensure interchangeability, reduce the variety of fixing devices, and support consistent mounting across industrial hydraulic equipment.
Key topics and requirements
- Scope and applicability: Applies to four‑port modular stack valves and four‑port directional control valves in sizes 02, 03, 05, 07, 08 and 10 used in industrial equipment.
- Clamping dimensions: Provides preferred and alternative (non‑preferred) clamping dimensions (see Tables 1 and 2). Preferred dimensions are recommended for new valve designs to maximize interchangeability.
- Dimension definitions: Specifies symbols such as H:
- For directional control valves, H indicates clamping length for fixing devices (bolt heads).
- For modular stack valves, H indicates overall mounting height (including O‑ring plate when applicable).
- Mounting surface conformity: Mounting surface shall be in accordance with ISO 4401 to guarantee compatibility between different manufacturers.
- Tolerances and increments: References ISO tolerancing practices and allows H to be adjusted in specified increments where necessary for design reasons.
- Working pressure: The standard notes that suppliers shall establish maximum working pressure limits for valves, subplates and manifold blocks - ISO 7790 does not set a single working pressure value.
- Identification statement: Provides recommended wording for catalogues and test reports when declaring conformance.
Applications and users
- Who uses it: Hydraulic system designers, valve manufacturers, subplate and manifold block producers, procurement engineers, OEMs and maintenance teams.
- Practical benefits:
- Ensures mechanical interchangeability of four‑port valves across suppliers.
- Simplifies mounting hardware selection and reduces inventory of fixing devices.
- Speeds design and assembly of hydraulic manifolds and modular valve stacks.
- Reduces risk of misfit or rework when replacing valves in industrial machinery.
- Typical sectors: Industrial hydraulics, mobile machinery manufacturers, machine tool builders, materials handling and automation systems.
Related standards
- ISO 4401 - Four‑port directional control valves - Mounting surfaces (mounting interface referenced throughout ISO 7790)
- ISO 5598 - Fluid power systems and components - Vocabulary (terms and definitions)
- ISO 5783 - Code for identification of valve mounting surfaces and cartridge valve cavities
Compliance sample (as provided in ISO 7790): “Modular stack valves and directional control valves clamping dimensions conform to ISO 7790, Hydraulic fluid power - Four‑port modular stack valves and four‑port directional control valves, sizes 02, 03, 05, 07, 08 and 10 - Clamping dimensions.”
ISO 7790:2013 - Hydraulic fluid power — Four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08 and 10 — Clamping dimensions Released:2/26/2013
ISO 7790:2013 - Transmissions hydrauliques — Appareils empilables et distributeurs à quatre orifices, de tailles 02, 03, 05, 07, 08 et 10 — Dimensions de montage Released:2/26/2013
Frequently Asked Questions
ISO 7790:2013 is a standard published by the International Organization for Standardization (ISO). Its full title is "Hydraulic fluid power - Four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08 and 10 - Clamping dimensions". This standard covers: ISO 7790:2013 specifies clamping dimensions of four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08, and 10, on mounting surfaces. The dimensions and sizes conform to ISO 4401 so as to ensure interchangeability of these valves and to reduce the number of fixing devices to be used. It applies to clamping dimensions of four-port modular stack valves and four-port directional control valves which represent current practice. They are generally applicable to industrial equipment.
ISO 7790:2013 specifies clamping dimensions of four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08, and 10, on mounting surfaces. The dimensions and sizes conform to ISO 4401 so as to ensure interchangeability of these valves and to reduce the number of fixing devices to be used. It applies to clamping dimensions of four-port modular stack valves and four-port directional control valves which represent current practice. They are generally applicable to industrial equipment.
ISO 7790:2013 is classified under the following ICS (International Classification for Standards) categories: 23.100.50 - Control components. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 7790:2013 has the following relationships with other standards: It is inter standard links to ISO 7790:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 7790:2013 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 7790
Third edition
2013-03-01
Hydraulic fluid power — Four-port
modular stack valves and four-port
directional control valves, sizes 02,
03, 05, 07, 08 and 10 — Clamping
dimensions
Transmissions hydrauliques — Appareils empilables et
distributeurs à quatre orifices, de tailles 02, 03, 05, 07, 08 et 10 —
Dimensions de montage
Reference number
©
ISO 2013
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Tolerances . 1
6 Dimensions . 1
7 Working pressure . 3
8 Identification statement (Reference to this International Standard) .3
Bibliography . 4
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7790 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 5,
Control products and components.
This third edition cancels and replaces the second edition (ISO 7790:1997), which has been
technically revised.
iv © ISO 2013 – All rights reserved
Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure
within an enclosed circuit. Typical components found in such systems are hydraulic valves and hydraulic
modular stack valves. These devices control flow direction, pressure, or flow rate of liquids in the
enclosed circuit.
INTERNATIONAL STANDARD ISO 7790:2013(E)
Hydraulic fluid power — Four-port modular stack valves
and f
...
NORME ISO
INTERNATIONALE 7790
Troisième édition
2013-03-01
Transmissions hydrauliques —
Appareils empilables et distributeurs
à quatre orifices, de tailles 02, 03, 05,
07, 08 et 10 — Dimensions de montage
Hydraulic fluid power — Four-port modular stack valves and four-
port directional control valves, sizes 02, 03, 05, 07, 08 and 10 —
Clamping dimensions
Numéro de référence
©
ISO 2013
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2013
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Publié en Suisse
ii © ISO 2013 – Tous droits réservés
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Symboles et termes abrégés . 1
5 Tolérances . 1
6 Dimensions . 1
7 Pression de fonctionnement . 3
8 Phrase d’identification (Référence à la présente Norme internationale) .3
Bibliographie . 4
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (CEI) en ce qui concerne
la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives
ISO/CEI, Partie 2.
La tâche principale des comités techniques est d’élaborer les Normes internationales. Les projets de
Normes internationales adoptés par les comités techniques sont soumis aux comités membres pour vote.
Leur publication comme Normes internationales requiert l’approbation de 75 % au moins des comités
membres votants.
L’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable de
ne pas avoir identifié de tels droits de propriété et averti de leur existence.
L’ISO 7790 a été élaborée par le comité technique ISO/TC 131, Transmissions hydrauliques et pneumatiques,
sous-comité SC 5, Appareils de régulation et de distribution et leurs composants.
Cette troisième édition annule et remplace la deuxième édition (ISO 7790:1997), qui a fait l’objet d’une
révision technique.
iv © ISO 2013 – Tous droits réservés
Introduction
Dans les systèmes de transmissions hydrauliques, l’énergie est transmise et commandée par
l’intermédiaire d’un liquide sous pression circulant en circuit fermé. Les distributeurs hydrauliques et
les appareils empilables sont des composants typiques de ces systèmes. Ces dispositifs commandent le
sens d’écoulement, la pression ou le débit des liquides dans le circuit fermé.
NORME INTERNATIONALE ISO 7790:2013(F)
Transmissions hydrauliques — Appareils empilables et
distributeurs à quatre orifices, de tailles 02, 03, 05, 07, 08
et 10 — Dimensions de montage
1 Domaine d’application
La présente Norme internationale prescrit les di
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