This document provides basic requirements for electric valve actuators, used for on-off and control valves. It includes guidelines for classification, design, enclosure and corrosion protection, and methods for conformity assessment.
Combinations of electric actuators and gearboxes when supplied by the actuator manufacturer are within the scope of this document.
This document does not cover solenoid actuators, electro-hydraulic actuators and electric actuators which are integral to the valves....
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This document applies to valves of DN 15 and larger, made of metallic materials for chemical and petrochemical plants. It contains additional requirements to those contained in the relevant European product standards (e.g. EN 593, EN 1349) and EN 16668.
The use of design codes or technical rules other than described by European product standards are subject to agreement with the purchaser.
Process control devices and safety accessories are not subject of this document.

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This document specifies only the requirements for a product assembled from the in-series combination
of safety valves or CSPRS (controlled safety pressure relief systems) according to ISO 4126-1, ISO 4126-4
and ISO 4126-5, and bursting disc safety devices, according to ISO 4126-2, installed upstream of the
valve within five pipe diameters of the valve inlet. It specifies the design, application and marking
requirements for such products, composed of the bursting disc safety device, a safety ...
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This document specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for
petroleum refinery and related applications where corrosion, erosion and other service conditions can
indicate a need for full port openings, heavy wall sections and large stem diameters.
This document sets forth the requirements for the following gate valve features:
— bolted bonnet;
— outside screw and yoke;
— rising stems;
— non-rising handwheels;
— single or double gate;
— wedge o...
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This document specifies the endurance test necessary to confirm the ability of hand-operated plastics
valves to withstand prolonged use, with repeated opening and closure. It does not specify the ability of
valves to withstand adverse conditions, in particular those of chemically aggressive fluid media and/or
environments, or excessive fluid velocities and cavitation.
NOTE Concerning the chemical aggression of the materials, a classification table is reported in
ISO/TR 10358[1].
This docum...
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This document specifies the general requirements for metallic check valves, which are forged, cast or fabricated in straight, angle or oblique pattern (see EN 736‐2) with end connections flanged or wafer, butt welding, socket welding, or threaded.
This document applies to metallic check valves used for all industrial applications.
Additional requirements given in the relevant application standards may apply to check valves used for more specific applications (e.g. for the water industry, the c...
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This document provides basic requirements for gearboxes to operate industrial valves for manual and automated on/off and modulating duties, this includes manual override gearboxes. It includes guidelines for classification, design and methods for conformity assessment. It does not cover gear systems which are integral part in the design of valves and subsea gearboxes. Other requirements or conditions of use different from those indicated in this document are agreed between the purchaser and the ...view more

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This document specifies the requirements for bursting disc safety devices.
It includes the requirements for the design, manufacture, inspection, testing, certification, marking,
and packaging.

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This European Standard specifies the tabulation method for determining the wall thickness of valve bodies, bonnets and covers with essentially circular cross-section made in forged, cast or fabricated steel.
For valve shells with oval, rectangular or non-circular shapes, see 8.6.
The range of PN or Class designations for which thicknesses are tabulated is:
PN 2,5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400, Class 150, Class 300,Class 600, Class 900, Class ...
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This European Standard specifies the calculation method for valve shells manufactured in metallic materials other than steel. The loadings to be accounted for are in accordance with EN 12516-2.
Design methods are in accordance with EN 12516-2, design by formulae according to the relevant clauses.

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This European standard applies to metallic valves as pressure accessories for industrial applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the Pressure Equipment Directive (PED) 97/23/EC and specifies minimum requirements applicable to design, manufacture, testing, materials and documentation.
All relevant essential safety requirements of the Pressure Equipment Directive (PED) 97/23/EC applicable to valves have been taken into consideration and are addres...
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This standard gives the denominations of valves. It has the purpose to provide a uniform and systematic terminology for all types of valves. By reasons of classification of terms clause 4 defines terms related to basic design characteristics and clause 5 defines terms related to functional characteristicsof valves.

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This European Standard specifies the dimensions of butt welding ends of steel valves DN 8 to DN 1 400 designed to be butt welded to standardized pipes.
NOTE   The outside diameters and wall thickness of standardized pipes are in accordance with ISO 4200.

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This European Standard specifies minimum general requirements for butterfly valves having metallic bodies for use in wafer, lug, flange or butt welding piping systems and used for isolating, regulating or control applications.
The PN and Class ranges are:
-   PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160;
-   Class 150; Class 300; Class 600; Class 900.
The DN range is:
-   DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100; DN 125; DN 150; DN 200; DN 250; DN 300; DN 350; DN...
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This European Standard specifies requirements for the attachment of part-turn actuators, with or without gearboxes, to industrial valves.
The attachment of part-turn actuators to control valves is in accordance with the requirements of this standard only when subject to an agreement between the supplier and the purchaser. This standard specifies : - flange dimensions necessary for the attachment of part-turn actuators to industrial valves (see Figure 1) or to intermediate supports (see Figure 1...
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This document specifies the requirements for the attachment of multi-turn actuators to valves.
Throughout this document, “actuator” may be understood as “actuator and/or gearbox” providing a
multi-turn and/or linear output.
It specifies:
— flange dimensions necessary for the attachment of actuators to industrial valves [see Figure 1 a)] or
to intermediate supports [see Figure 1 b)];
— those driving component dimensions of actuators which are necessary to attach them to the driven
componen...
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The purpose is to establish certain basic requirements for the marking of steam traps, and to give recommendations for additional information markings. Has, in general, to be considered in conjunction with the specific requirements which may be agreed between the partners concerned. Specifies mandatory and optional markings for steam traps.

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ISO 15848-1:2015 specifies testing procedures for evaluation of external leakage of valve stem seals (or shaft) and body joints of isolating valves and control valves intended for application in volatile air pollutants and hazardous fluids. End connection joints, vacuum application, effects of corrosion, and radiation are excluded from this part of ISO 15848.
ISO 15848-1:2015 concerns classification system and qualification procedures for type testing of valves.

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ISO 28921-2:2015 specifies requirements for the type testing of isolating valves for low-temperature applications to verify the performance of valves at a low temperature from ? 50 °C down to ? 196 °C.
NOTE Nominal sizes (DN), nominal pipe sizes (NPS), nominal pressure (PN) and Classes are covered in ISO 28921‑1.
ISO 28921-2:2015 does not evaluate valve actuators unless they are integral part of the valve. Valves during testing can be operated manually or an actuator can be used during the tes...
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This European Standard specifies the face to face (FTF) and centre to face (CTF) dimensions for PN and Class designated metal valves used in flanged pipe systems.
This European Standard covers valves with the following PN, Class and DN values:
-   PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160; PN 250; PN 320; PN 400;
-   Class 125; Class 150; Class 250; Class 300; Class 600; Class 900; Class 1 500; Class 2 500.
-   DN 10; DN 15; DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN...
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ISO 28921-1:2013 specifies requirements for design, dimensions, material, fabrication and production testing of isolation valves for low-temperature applications. It applies to gate, globe, check, butterfly and ball valves and can be used for other valve types used in low-temperature services.
ISO 28921-1:2013 covers isolation valves for use in cryogenic temperature service where the design low-temperature service is ?50 °C down to ? 96 °C. It covers valves with body, bonnet, bonnet extension o...
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This European Standard specifies the dimensions of socket welding ends of steel valves designed to be socket welded to standardised pipes in the size range DN 6 to DN 65.

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This part of ISO 6020 establishes metric mounting dimensions for single rod compact series
hydraulic cylinders with bores from 250 mm to 500 mm for use at 16 MPa (160 bar1)), as required for
interchangeability of commonly used hydraulic cylinders.
NOTE 1 This part of ISO 6020 allows manufacturers of hydraulic equipment flexibility in the design of metric
cylinders and does not restrict technical development, but does provide basic guidelines.
NOTE 2 The compact series dimensions are most ap...
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This part of ISO 10767 establishes a test procedure for measuring the source flow ripple and source
impedance of positive-displacement hydraulic pumps. It is applicable to all types of positivedisplacement
pumps operating under steady-state conditions, irrespective of size, provided that the
pumping frequency is in the range from 50 Hz to 400Hz.
Source flow ripple causes fluid borne vibration (pressure ripple) and then airborne noise from
hydraulic systems. This procedure covers a frequency...
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This International Standard specifies a method for verifying the end load rating of a hydraulic fluid
power filter element. It also verifies the ability of a hydraulic fluid power filter element to withstand the
designated axial loading imposed by installation and use.

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This International Standard establishes mounting dimensions for cylinders for use at 10 MPa [100 bar1)],
as required for interchangeability of these cylinders.
NOTE This International Standard allows manufacturers of hydraulic equipment flexibility in the design of
10 MPa (100 bar) cylinders and does not restrict technical development; however, it does provide basic guidelines.

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This European Standard specifies the requirements for marking of industrial metallic valves. It defines the method of applying the markings, on the body, on a flange, on an identification plate or any other location.
When specified as a normative reference in a valve product or performance standard, this European Standard has to be considered in conjunction with the specified requirements of that valve product or performance standard.
The marking requirements for plastic valves are not within ...
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This part of ISO 6953 specifies test procedures and a method of presenting the results concerning
the parameters which define the main characteristics to be included in literature from suppliers of
regulators and filter-regulators conforming to ISO 6953-1.
The purpose of this part of ISO 6953 is the following:
— to facilitate the comparison of pressure regulators and filter-regulators by standardizing test
methods and presentation of test data;
— to assist in the proper application of pres...
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This part of ISO 10771 specifies a method of fatigue testing the pressure-containing envelopes of
components used in hydraulic fluid power systems under sustained steady cyclic internal pressure loads.
This part of ISO 10771 is only applicable to component pressure-containing envelopes that
— are manufactured from metals,
— are operated at temperatures that exclude creep and low-temperature embrittlement,
— are only subjected to pressure-induced stresses,
— are not subjected to loss of str...
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This part of ISO 6953 specifies which characteristics of compressed air pressure regulators are to be
included in literature from their suppliers. It also applies to filter-regulators.
This part of ISO 6953 applies to
— manually controlled direct operated types (with or without relieving mechanism),
— manually controlled internal pilot operating types (e.g. nozzle flapper), and
— external pilot operated types.
In addition, it specifies the product marking requirements for pressure regulato...
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This part of ISO 3601 contains the material specification of a selection of standard elastomeric materials
(rubber) for O-rings used in general industrial applications. It also indicates the ability of the materials
to satisfy many of the requirements associated with fluid power components.
Only materials which are in universal usage are specified; other compounds are available and can be used.
The required physical properties and test methods (including test specimen) should be agreed upon
...
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This part of ISO 15171 specifies dimensions, performance requirements, and test procedures for
diagnostic couplings with an M16 × 2 connection end that can be connected under pressure without
tools to a maximum pressure of 40 MPa (400 bar) providing following stud ends:
— ISO 6149-2 – M14 × 1,5;
— ISO 9974-2 – M14 × 1,5;
— ISO 1179-2 – G 1/4;
— ISO 11926-2 – 7/16-20 UNF.
The dimensions of the coupler counterpart are specified. The coupling is designed for use in hydraulic
systems that us...
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This International Standard specifies the preferred series of piston strokes for application to singleacting
and double-acting fluid power cylinders. These strokes are mainly used for pneumatic cylinders
but may also be used for hydraulic cylinders.

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This International Standard specifies the content of an inspection document that specifies both the
cleanliness requirement for the specified hydraulic fluid power component and the inspection method
to be used for evaluating its cleanliness level. In addition, guidelines for relevant extraction methods
and analysis methods are given.
Determination of what constitutes as an appropriate cleanliness level requirement for any particular
component is beyond the scope of this International Stand...
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This International Standard establishes a metric series of mounting dimensions required for
interchangeability of commonly used pneumatic cylinders for a maximum working pressure of
1 000 kPa (10 bar).
NOTE This International Standard allows manufacturers freedom of design in metric cylinders and does not
restrict technical development but provides basic guidelines.

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This Technical Report discusses the impact of changes in International Standards for particle counting,
contamination control, and filter testing.
Liquid automatic particle counters (APCs) are used in monitoring contamination levels in hydraulic
fluids, to establish component and assembly cleanliness level specifications, and in determining filter
efficiencies and particle size ratings. As a result of the replacement of ISO 4402 with ISO 11171 (APC
calibration), the replacement of ISO 4572 ...
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This European Standard specifies the names of components of valves and their definitions. It has the purpose to provide a uniform terminology for all components of valves.
This European Standard covers components common to more than one type of valve. Names of components and definitions specific to one type of valve will be found in the relevant product or performance standard.

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ISO 17292:2004 specifies the requirements for a series of metal ball valves suitable for petroleum, petrochemical, natural gas plants, and related industrial applications. It covers valves of the nominal sizes DN 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450 and 500, corresponding to nominal pipe sizes NPS 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 4, 6, 8, 10, 12, 14, 16, 18 and 20, and is applicable for pressure designations of Class 150, 300, 600 and 800...view more

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This European Standard specifies the end to end and centre to end dimensions for valves with screwed ends with connecting dimensions in compliance with EN ISO 228-1 or EN 10226-1, used in PN and Class designated piping systems.
The range of PN is:
-   PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160; PN 250; PN 320; PN 400.
The range of Class is:
-   Class 150, Class 300, Class 600, Class 900, Class 1 500, Class 2 500.
The range of nominal size is:
-   DN 4; DN 6; DN 8; DN 10; DN 15; DN 20; DN ...
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This European Standard specifies the requirements for cast iron gate valves with flanged ends, socket ends or spigot ends.
This standard is applicable to cast iron gate valves mainly used for industrial and general-purpose applications. However, they can be used for other applications provided the requirements of the relevant performance standards are met.
The range of nominal sizes covered is:
DN 40 ; DN 50 ; DN 65 ; DN 80 ; DN 100 ; DN 125 ; DN 150 ; DN 200 ; DN 250 ; DN 300 ; DN 350 ; DN 4...
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