ISO 7368:2025

Hydraulic fluid power — Two-port slip-in cartridge valves — Cavities

This document specifies only geometrical data relating to cavities in which two-port hydraulic slip-in cartridge valves are mounted in order to ensure interchangeability. NOTE For example, this document does not specify rated pressures. It applies to cavities for two-port hydraulic slip-in cartridge valves which are generally applicable to industrial equipment.

Transmissions hydrauliques — Distributeurs à cartouche, à bride, à deux orifices — Logements

L'ISO 7368 :2016 spécifie, à des fins d'interchangeabilité, uniquement les données géométriques des logements dans lesquels sont montés les distributeurs à cartouche, à bride, à deux orifices. NOTE Par exemple, le présent document ne spécifie pas les pressions nominales. Elle est applicable aux logements des distributeurs à cartouche, à bride, à deux orifices généralement utilisés dans les équipements industriels.

General Information

• Status: Published
• Publication Date: 01-Jul-2025
• ICS: 23.100.50 - Control components
• Technical Committee: ISO/TC 131/SC 5 - Control products and components
• Drafting Committee: ISO/TC 131/SC 5 - Control products and components
• Current Stage: 6060 - International Standard published
• Start Date: 02-Jul-2025
• Due Date: 25-Oct-2025
• Completion Date: 02-Jul-2025

Relations

• Revises: ISO 7368:2016 - Hydraulic fluid power — Two-port slip-in cartridge valves — Cavities
• Effective Date: 29-Oct-2022

Standards Content (Sample)

International
Standard
ISO 7368
Third edition
Hydraulic fluid power — Two-port
2025-07
slip-in cartridge valves — Cavities
Transmissions hydrauliques — Distributeurs à cartouche, à bride,
à deux orifices — Logements
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Tolerances . 2
6 Dimensions . 2
7 Identification statement (reference of this document) . 3
Bibliography .36

iii
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document 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 7368:2016), which has been technically
revised.
The main changes are as follows:
— codification adapted to ISO 5783:2019, Clause 6 and all figure and table titles;
— introduction of new reference B on the manifold surface and perpendicularity to diameter d (all figures);
— the runout tolerance of diameter d additionally refers primarily to datum B. This is to avoid measuring
errors due to the short measuring distance of diameter d for determining the datum axis;
— R introduced at the face side (inner corner) of outside diameter d for all sizes (all figures);
2 2
— the tolerance of depth Z in Table 6 has been changed similar to Table 5 to ±0,2 mm;
— “NOTE Size 15 and size 16 are not yet listed in ISO 5783” in Clause 4 was deleted, because these sizes
were included in ISO 5783-2019.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
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. These devices
control flow direction, pressure or flow rate of liquids in the enclosed circuit.

v
International Standard ISO 7368:2025(en)
Hydraulic fluid power — Two-port slip-in cartridge valves —
Cavities
1 Scope
This document specifies only geometrical data relating to cavities in which two-port hydraulic slip-in
cartridge valves are mounted in order to ensure interchangeability.
NOTE For example, this document does not specify rated pressures.
It applies to cavities for two-port hydraulic slip-in cartridge valves which are generally applicable to
industrial equipment.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 3601-2, Fluid power systems — O-rings — Part 2: Housing dimensions for general applications
ISO 5598, Fluid power systems and components — Vocabulary
ISO 21920-1, Geometrical product specifications (GPS) — Surface texture: Profile — Part 1: Indication of
surface texture
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Symbols
a) A, B, X, Y, Z and Z identify ports the operational usage of which, in some cases, may be different from
1 2
that given in the following examples:
1) A: inlet, service, return corresponding to the placing in the hydraulic circuit;
2) B: inlet, service, return corresponding to the placing in the hydraulic circuit;
3) X: pilot, inlet;
4) Y: pilot, return;
5) Z : supplementary pilot, inlet;
6) Z : supplementary pilot, return;
b) F … F identify threaded holes for fixing screws;
1 12
c) G, G and G identify the location of pin holes;
1 2
d) D identifies the fixing screw diameter;
e) r identifies the mounting surface edge radius;
max
f) R indicates the maximum radius at the bottom of d ;
1 1
g) R indicates the maximum radius at the bottom of d .
2 2
The code system used in this document is defined in ISO 5783.
5 Tolerances
The following requirements shall be applied to the sealing and chamfer surfaces, i.e. that area within the
chain lines:
— surface roughness, Rz, as indicated on the figures in accordance with ISO 21920-1;
— all non-specified surface finishes: Rz 63;
— surface roughness values are given in micrometres (µm);
— surface flatness: 0,01 mm over a distance of 100 mm as specified in ISO 3601-2.
The following tolerances shall be complied with along the X, Y and Z axes with respect to the origin:
— pin holes: ±0,2 mm;
— screw holes: ±0,2 mm;
— port holes: ±0,2 mm;
— general tolerances in accordance with ISO 2768-1, ISO 2768-m for linear and angular dimensions without
tolerances.
As for other dimensions, see Figure 1 to Figure 16.
6 Dimensions
6.1 Cavity dimensions for hydraulic slip-in cartridge valves with two main ports shall be selected from
Figure 1 to Figure 16 and Table 1 to Table 16 as specified in 6.2 to 6.17.
6.2 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 16 mm nominal diameter (size 06) (code: 7368 - 06 - 01 - 1 - 25) are specified in Table 1 and shown in
Figure 1.
6.3 Cavity dimensions for main system pressure-relief valves with main ports of 16 mm nominal diameter
(size 06) (code: 7368 - 06 - 02 - 1 - 25) are specified in Table 2 and shown in Figure 2.
6.4 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 25 mm nominal diameter (size 08) (code: 7368 - 08 - 03 - 1 - 25) are specified in Table 3 and shown in
Figure 3.
6.5 Cavity dimensions for main system pressure-relief valves with main ports of 25 mm nominal diameter
(size 08) (code: 7368 - 08 - 04 - 1 - 25) are specified in Table 4 and shown in Figure 4.

6.6 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 32 mm nominal diameter (size 09) (code: 7368 - 09 - 05 - 1 - 25) are specified in Table 5 and shown in
Figure 5.
6.7 Cavity dimensions for main system pressure-relief valves with main ports of 32 mm nominal diameter
(size 09) (code: 7368 - 09 - 06 - 1 - 25) are specified in Table 6 and shown in Figure 6.
6.8 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 40 mm nominal diameter (size 10) (code: 7368 - 10 - 07 - 1 - 25) are specified in Table 7 and shown in
Figure 7.
6.9 Cavity dimensions for main system pressure-relief valves with main ports of 40 mm nominal diameter
(size 10) (code: 7368 - 10 - 08 - 1 - 25) are specified in Table 8 and shown in Figure 8.
6.10 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 50 mm nominal diameter (size 11) (code: 7368 - 11 - 09 - 1 - 25) are specified in Table 9 and shown in
Figure 9.
6.11 Cavity dimensions for main system pressure-relief valves with main ports of 50 mm nominal diameter
(size 11) (code: 7368 - 11 - 10 - 1 - 25) are specified in Table 10 and shown in Figure 10.
6.12 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 63 mm nominal diameter (size 12) (code: 7368 - 12 - 11 - 1 - 25) are specified in Table 11 and shown in
Figure 11.
6.13 Cavity dimensions for main system pressure-relief valves with main ports of 63 mm nominal diameter
(size 12) (code: 7368 - 12 - 12 - 1 - 25) are specified in Table 12 and shown in Figure 12.
6.14 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 80 mm nominal diameter (size 13) (code: 7368 - 13 - 13 - 1 - 25) are specified in Table 13 and shown in
Figure 13.
6.15 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 100 mm nominal diameter (size 14) (code: 7368 - 14 - 14 - 1 - 25) are specified in Table 14 and shown in
Figure 14.
6.16 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 125 mm nominal diameter (size 15) (code: 7368 - 15 - 15 - 1 - 25) are specified in Table 15 and shown in
Figure 15.
6.17 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 160 mm nominal diameter (size 16) (code: 7368 - 16 - 16 - 1 - 25) are specified in Table 16 and shown in
Figure 16.
7 Identification statement (reference of this document)
Use the following statement in test reports, catalogues and sales literature when electing to conform with
this document:
"Cavity dimensions conform to ISO 7368, Hydraulic fluid power — Two-port slip-in cartridge valves — Cavities.”

Dimensions and geometrical tolerances in millimetres

a
The dimension specifying the area within the chain lines is the minimum dimension for mounting the cartridge
valve cover. The corners of the square may be rounded to a maximum radiu
...

FINAL DRAFT
International
Standard
ISO/FDIS 7368
ISO/TC 131/SC 5
Hydraulic fluid power — Two-port
Secretariat: AFNOR
slip-in cartridge valves — Cavities
Voting begins on:
Transmissions hydrauliques — Distributeurs à cartouche, à bride, 2025-04-08
à deux orifices — Logements
Voting terminates on:
2025-06-03
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 7368:2025(en) © ISO 2025

FINAL DRAFT
ISO/FDIS 7368:2025(en)
International
Standard
ISO/FDIS 7368
ISO/TC 131/SC 5
Hydraulic fluid power — Two-port
Secretariat: AFNOR
slip-in cartridge valves — Cavities
Voting begins on:
Transmissions hydrauliques — Distributeurs à cartouche, à bride,
à deux orifices — Logements
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 7368:2025(en) © ISO 2025

ii
ISO/FDIS 7368:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Tolerances . 2
6 Dimensions . 2
7 Identification statement (reference of this document) . 3
Bibliography .30

iii
ISO/FDIS 7368:2025(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document 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 7368:2016), which has been technically
revised.
The main changes are as follows:
— codification adapted to ISO 5783:2019, Clause 6 and all figure and table titles;
— introduction of new reference B on the manifold surface and perpendicularity to diameter d (all figures);
— the runout tolerance of diameter d additionally refers primarily to datum B. This is to avoid measuring
errors due to the short measuring distance of diameter d for determining the datum axis;
— R introduced at the face side (inner corner) of outside diameter d for all sizes (all figures);
2 2
— the tolerance of depth Z in Table 6 has been changed similar to Table 5 to ±0,2 mm;
— “NOTE Size 15 and size 16 are not yet listed in ISO 5783” in Clause 4 was deleted, because these sizes
were included in ISO 5783-2019.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO/FDIS 7368:2025(en)
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. These devices
control flow direction, pressure or flow rate of liquids in the enclosed circuit.

v
FINAL DRAFT International Standard ISO/FDIS 7368:2025(en)
Hydraulic fluid power — Two-port slip-in cartridge valves —
Cavities
1 Scope
This document specifies only geometrical data relating to cavities in which two-port hydraulic slip-in
cartridge valves are mounted in order to ensure interchangeability.
NOTE For example, this document does not specify rated pressures.
It applies to cavities for two-port hydraulic slip-in cartridge valves which are generally applicable to
industrial equipment.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 3601-2, Fluid power systems — O-rings — Part 2: Housing dimensions for general applications
ISO 5598, Fluid power systems and components — Vocabulary
ISO 21920-1, Geometrical product specifications (GPS) — Surface texture: Profile — Part 1: Indication of
surface texture
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Symbols
a) A, B, X, Y, Z and Z identify ports the operational usage of which, in some cases, may be different from
1 2
that given in the following examples:
1) A: inlet, service, return corresponding to the placing in the hydraulic circuit;
2) B: inlet, service, return corresponding to the placing in the hydraulic circuit;
3) X: pilot, inlet;
4) Y: pilot, return;
5) Z : supplementary pilot, inlet;
ISO/FDIS 7368:2025(en)
6) Z : supplementary pilot, return;
b) F … F identify threaded holes for fixing screws;
1 12
c) G, G and G identify the location of pin holes;
1 2
d) D identifies the fixing screw diameter;
e) r identifies the mounting surface edge radius;
max
f) R indicates the maximum radius at the bottom of d .
1 1
g) R indicates the maximum radius at the bottom of d .
2 2
The code system used in this document is defined in ISO 5783.
5 Tolerances
The following requirements shall be applied to the sealing and chamfer surfaces, i.e. that area within the
chain lines:
— surface roughness, Rz, as indicated on the figures in accordance with ISO 21920-1;
— all non-specified surface finishes: Rz 63;
— surface roughness values are given in micrometres (µm);
— surface flatness: 0,01 mm over a distance of 100 mm as specified in ISO 3601-2.
The following tolerances shall be complied with along the X, Y and Z axes with respect to the origin:
— pin holes: ±0,2 mm;
— screw holes: ±0,2 mm;
— port holes: ±0,2 mm;
— general tolerances in accordance with ISO 2768-1, ISO 2768-m for linear and angular dimensions without
tolerances.
As for other dimensions, see Figure 1 to Figure 16.
6 Dimensions
6.1 Cavity dimensions for hydraulic slip-in cartridge valves with two main ports shall be selected from
Figure 1 to Figure 16 and Table 1 to Table 16 as specified in 6.2 to 6.17.
6.2 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 16 mm nominal diameter (size 06) (code: 7368 - 06 - 01 - 1 - XX) are specified in Table 1 and shown in
Figure 1.
6.3 Cavity dimensions for main system pressure-relief valves with main ports of 16 mm nominal diameter
(size 06) (code: 7368 - 06 - 02 - 1 - XX) are specified in Table 2 and shown in Figure 2.
6.4 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 25 mm nominal diameter (size 08) (code: 7368 - 08 - 03 - 1 - XX) are specified in Table 3 and shown in
Figure 3.
6.5 Cavity dimensions for main system pressure-relief valves with main ports of 25 mm nominal diameter
(size 08) (code: 7368 - 08 - 04 - 1 - XX) are specified in Table 4 and shown in Figure 4.

ISO/FDIS 7368:2025(en)
6.6 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 32 mm nominal diameter (size 09) (code: 7368 - 09 - 05 - 1 - XX) are specified in Table 5 and shown in
Figure 5.
6.7 Cavity dimensions for main system pressure-relief valves with main ports of 32 mm nominal diameter
(size 09) (code: 7368 - 09 - 06 - 1 - XX) are specified in Table 6 and shown in Figure 6.
6.8 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 40 mm nominal diameter (size 10) (code: 7368 - 10 - 07 - 1 - XX) are specified in Table 7 and shown in
Figure 7.
6.9 Cavity dimensions for main system pressure-relief valves with main ports of 40 mm nominal diameter
(size 10) (code: 7368 - 10 - 08 - 1 - XX) are specified in Table 8 and shown in Figure 8.
6.10 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 50 mm nominal diameter (size 11) (code: 7368 - 11 - 09 - 1 - XX) are specified in Table 9 and shown in
Figure 9.
6.11 Cavity dimensions for main system pressure-relief valves with main ports of 50 mm nominal diameter
(size 11) (code: 7368 - 11 - 10 - 1 - XX) are specified in Table 10 and shown in Figure 10.
6.12 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main ports
of 63 mm nominal diameter (size 12) (code: 7368 - 12 - 11 - 1 - XX) are specified in Table 11 and shown in
Figure 11.
6.13 Cavity dimensions for main system pressure-relief valves with main ports of 63 mm nominal diameter
(size 12) (code: 7368 - 12 - 12 - 1 - XX) are specified in Table 12 and shown in Figure 12.
6.14 Cavity dimensions for all types of valves, except main system pressure-relief valves, with main por
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Date: 2025-03-06
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ISO/TC 131/SC 5/WG 2
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Secretariat: AFNOR
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Hydraulic fluid power — Two-port slip-in cartridge valves —
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Cavities
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Copyright notice
ThisFDIS stage
ISO/FDIS 7368:2024(E2025(en) Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
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© ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted under 2025
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All rights reserved. Unless otherwise specified, or required in the applicable lawscontext of the user's country, neither its
implementation, no part of this ISO draft nor any extract from itpublication may be reproduced, stored in a retrieval
system or transmitted or utilized otherwise in any form or by any means, electronic, or mechanical, including
photocopying, recording or otherwiseor posting on the internet or an intranet, without prior written permission being
secured.
Requests for permission to reproduce should be addressed to . Permission can be requested from either ISO at the
Formatted: Line spacing: single, Adjust space between
address below or ISO'sISO’s member body in the country of the requester.
Latin and Asian text, Adjust space between Asian text
and numbers
ISO copyright office
Case postale 56 • CP 401 • Ch. de Blandonnet 8
CH-12111214 Vernier, Geneva 20
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iv © ISO 2023 – All rights reserved
iv
ISO/FDIS 7368:2025(en)
Formatted: Font: 11 pt, Bold
Formatted: Font: Bold
Formatted: HeaderCentered, Left
Contents
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
Foreword . vi
Introduction . viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Tolerances . 2
6 Dimensions. 3
7 Identification statement (reference of this document) . 4
Bibliography . 30

Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and Definitions . 1
4 Symbols . 1
5 Tolerances . 2
6 Dimensions . 2
7 Identification statement (Reference of this International Standard) . 4
Bibliography . 37
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ISO/FDIS 7368:2024(E2025(en) Formatted: Font: 11 pt, Bold
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Foreword
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ISO (the International Organization for Standardization) is a worldwide federation of national standards Formatted: Adjust space between Latin and Asian text,
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through Adjust space between Asian text and numbers
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents.www.iso.org/patents. ISO shall not be held responsible for identifying any or all such
patent rights.
Any trade name used in this document is information given for the convenience of users and does not
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constitute an endorsement.
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For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
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Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
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www.iso.org/iso/foreword.html.www.iso.org/iso/foreword.html.
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This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 5,
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Control products and components.
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This third edition cancels and replaces the second edition (ISO 7368:2016), which has been technically
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revised.
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The main changes are as follows:
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3.5 cm + 4.2 cm + 4.9 cm + 5.6 cm + 6.3 cm + 7 cm
— — codification adapted to ISO 5783:2019 (clause, Clause 6 and all figure and table titles);;
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— — introduction of new reference B on the manifold surface and perpendicularity to diameter d (all
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figures);
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— — the runout tolerance of diameter d additionally refers primarily to datum B. This is to avoid measuring Commented [eXtyles1]: Not found, but similar references
exist
errors due to the short measuring distance of diameter d for determining the datum axis;
ISO 5783, Hydraulic fluid power — Code for identification
— — R introduced at the face side (inner corner) of outside diameter d for all sizes (all figures);
2 2
of valve mounting surfaces
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— — the tolerance of depth Z in table 6Table 6 has been changed similar to Table 5Table 5 to +/- ±0,2 mm;
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— — “NOTE Size 15 and size 16 are not yet listed in ISO 5783” in Clause 4Clause 4 was deleted, because
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these sizes were included in ISO 5783-2019.
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vi © ISO 2023 – All rights reserved
vi
ISO/FDIS 7368:2025(en)
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Any feedback or questions on this document should be directed to the user’s national standards body. A
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complete listing of these bodies can be found at www.iso.org/members.html.www.iso.org/members.html.
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https://www.iso.org/members.html has been redirected to
http://www.iso.org/about/members. Please verify the URL.
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ISO/FDIS 7368:2024(E2025(en) Formatted: Font: 11 pt, Bold
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Introduction
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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. These devices control
flow direction, pressure or flow rate of liquids in the enclosed circuit.
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viii © ISO 2023 – All rights reserved
viii
FINAL DRAFT International Standard ISO/FDIS 7368:2025(en)

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Hydraulic fluid power — Two-port slip-in cartridge valves — Cavities
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1 Scope
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This document specifies only geometrical data relating to cavities in which two-port hydraulic slip-in cartridge
valves are mounted in order to ensure interchangeability.
NOTE For example, this document does not specify rated pressures.
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It applies to cavities for two-port hydraulic slip-in cartridge valves which are generally applicable to industrial
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equipment.
3.5 cm + 4.2 cm + 4.9 cm + 5.6 cm + 6.3 cm + 7 cm
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2 Normative references
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The following documents are referred to in the text in such a way that some or all of their content constitu
...