इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 15331 (2003): Pneumatic Fluid Power - Identification of Ports and Control Mechanisms of Control Valves and Other Components [PGD 16: Fluid Power] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 15331:2003 ISO 11727:1999 mfam?Ffm-tiamd** mihhlmi * R7m IaWlm Indian Standard PNEUMATIC FLUID POWER — IDENTIFICATION OF PORTS AND CONTROL MECHANISMS OF CONTROL VALVES AND OTHER COMPONENTS ICS 23.100.50 @91S 2003 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 April 2003 Price Group 5 Pneumatic Fluid Power Systems Sectional Committee, BP 16 NATIONAL FOREWORD This Indian Standard which is identical with ISO 11727:1999 ‘Pneumatic fluid power— Identification of ports and control mechanisms of control valves and other components’ issued by the International Organization for Standardization ( ISO ) was adopted by the Bureau of Indian Standards on the recommendation of the Pneumatic Fluid Power Systems Sectional Committee and approval of the Basic and Production Engineering Division Council. In pneumatic fluid power systems power is transmitted and controlled through gas under pressure within a circuit. Flow is directed through and blocked from selected passages in the several components of a pneumatic system. Identification of the ports and the control mechanisms permits the user to properly connect components in a system when using a circuit diagram. The text of the ISO Standard has been approved as suitable for publication as Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following: a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’. b) Comma ( , ) has been used as a decimal marker in the International Standard while in Indian Standards, the current practice is to use a point ( .) as the decimal marker. Inthis adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their place are listed below along with their degree of equivalence for the editions indicated: International Standard Corresponding Indian Standard Degree of Equivalence ISO 1219-1 : 19911) Fluid power IS 7513: 1974 Graphical symbols Identical with systems and components — for fluid power systems 1S01219 :1976 Graphic symbols and circuit diagrams — Part 1 : Grap hic symbols ISO 5598 : 1985 Fluid power IS 10416 : 1992 Fluid power Identical systems and components — systems and components — Vocabulary Vocabulary ( first revision) ISO 5599-1 :1989 Pneumatic fluid IS 15045 ( Part 1 ) :2001 Pneumatic do power — Five-port directional fluid power — Five-port directional control valves — Part 1 : Mounting control valves : Part 1 Mounting interface surfaces without electrical interface surfaces without electrical connector connector ISO 5599-2:1990 Pneumatic fluid IS 15045 ( Part 2 ) :2001 Pneumatic do power — Five-port directional fluid power — Five-port directional control valves — Part 2 : Mounting control valves : Part 2 Mounting interface surfaces with optional interface surfaces with optional electrical connector electrical connector 1)under revision, andmaybeadoptedonrevisionasdecidedbytheconcerned SeCtiOd cOrYIrllkh3e. ( Continued on third cover) IS 15331 :2003 ISO 11727:1999 Indian Standard PNEUMATIC FLUID POWER — IDENTIFICATION OF PORTS AND CONTROL MECHANISMS OF CONTROL VALVES AND OTHER COMPONENTS 1 Scope 1.1 This International Standard includes rules for identifying and marking ports in pneumatic directional control valves. These ports are the main flow connections, control connections and pilot supply connections. 1.2 This International Standard includes rules for identifying and marking electrical leads for solenoids. It is not applicable to internal electrical connections across manifold sections, such as connections to bus systems. 1.3 This International Standard includes rules for identifying and marking control mechanisms of directional control valves. 1.4 This International Standard includes rules for identifying and marking ports andlor flow path directions in filters, regulators, lubricators, non-return (check) valves, flow control valves and other ancillary devices. 1.5 This International Standard does not include rules for identifying and marking ports on proportional pneumatic valves, air logic valves, cylinders, air motors, semi-rotary actuators, air compressors, air dryers or other devices not specifically described in this International Standard. 2 Normative reference The following normative documeht contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applyin g the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 5598, Fluid power systems and components — Vocabulary. 3 Terms and definitions For the purposes of this International Standard, the terms and definitions given in ISO 5598 and the following apply. 3.1 control mechanism device that provides an input signal to a component (e.g. lever, solenoid) NOTE The terms “operator”and “actuator”have sometimes been used forthisdefinition, butthe term “controlmechanism” ispreferred. 3.2 pilot control port port that is subject to a change in pressure, usually an applied pressure signal from an external source, that produces a change in state of the component under control IS 15331 :2003 ISO 11727:1999 3.3 external pilot supply port port that receives a continuous, uninterrupted supply of pressure from an external source for use by a control mechanism 3.4 main ports ports in a component that are either connected to one another or blocked upon actuation by the control mechanism 3.5 solenoid lead electrical wires directly attached to a solenoid winding 3.6 electric lead electrical wires communicating with an electrically operated valve that are used for field connections. NOTE These might not be directly attached to a solenoid winding when the valve has electrical circuitry or other internal connections. 3.7 normally closed (NC) valve valve that, in its normal position (as defined in ISO 5598), has its inlet port closed 3.8 normally open (NO) valve valve that, in its normal position (as defined in ISO 5598), has its inlet porl connected to its outlet port 3.9 diverter valve 3/2 directional control valve with a single inlet port that can divert flow to either of two separate outlet ports 3.10 selector valve 3/2 directional control valve with a single outlet port, flow to which can be selected from either of two separate inlet ports 3.11 lockout valve manually controlled valve that has two operating positions NOTE The first position allows normal passage of pressurized fluid into a machine or system. The second prevents the passage offluid from the inletand allows a discharge ofthe pressurized fluidfrom a machine orsystem. The control device is capable ofbeing locked, bya key orcombination padlock, inthe second position only. 3.12 identification means of reference to be used in descriptive literature or on a label associated with a component 3.13 mark means of reference to be applied directly on the component 3.14 pilot exhaust port exhaust port associated with a control mechanism which provides an exhaust or relief function which is not part of the actual control function 2 IS 15331 :2003 ISO 11727:1999 3.15 3/2 normally open optional valve 3/2 directional control valve supplied as a normally closed valve, and marked or identified as such, but constructed so that the inlet and exhaust connection can be interchanged to provide a normally open mode of operation 3.16 5/2 optional dual pressure valve 5/2 directional control valve with standard main porl identification, but which is constructed so that the exhaust ports 5 and 3 can be used as separate inlets and the normal inlet port 1, used as a common exhaust port 4 General principles 4.1 The numerals used in this International Standard are the principal means of port identification based on the precedence established in ISO 5599-1, ISO 5599-2 and ISO 5599-3. Some exceptions are defined for pilot supply ports in valves and for flow direction arrows in two-ported devices. 4.2 Main ports are identified by single-digit numbers. 4.3 Control mechanisms, the pilot control ports and their e~ectrical leads are identified by double-digit numbers. The first of these digits is the number one (1) and the second digit is the main port that communicates with main port 1 when the correspondingly numbered control mechanism is actuated. If the control mechanism causes main port 1to become blocked, a zero (0) is used as the second digit. NOTE 1 Other flow paths may exist or become blocked as a result of a control mechanism actuation, inaddition to the flow path related to main port 1. These maybe determined from the graphic symbol forthe valve. \ NOTE 2 The principle in4.3, however, does notapply tothe centre position ofthree-position valves orto mechanical/manual control mechanisms that have multiple independent positions. 4.4 Port locations and control mechanism locations are not required to occupy any specific position on a component. Their physical location relative to graphic symbols on a drawing also need not correspond. 5 Directional control valves 5.1 Use of single-digit identification numbers Use the single-digit identification numbers as listed in Table 1to identify and mark the main ports. Marking shall be placed next to the ports on the component or on labels that are located to identify the ports. 5.2 Use of two-digit identification numbers Use the two-digit identification numbers as listed in Table 1to identify and, if desired, mark the control mechanisms and to identify and mark the pilot control ports (if any exist), plus the solenoid leads (if any exist — see 5.2.1). 3 IS 15331 :2003 ISO 11727:1999 Table 1— Valve port and control mechanism identifications Valve Description Main ports Control mechanisms, types pilot control ports, solenoid and electrical leads Inlet(s) Outlet(s) Exhaust(s) 2/2 Two-Porl 1 2 . 12, 10 3/2 NC Three-port NC 1 2 3 12, 10 3/2 NO Three-port NO 1 2 3 12, 10 3/2 NO (Optional) b 3 2 1 12, 10 3/2 Diverter 2 1,3 — 12, 10 3/2 Selector 1,3 2 — 12, 10 .12& 4/3 Four-port 1 2,4 3 12, 14 ;/2 & 5/3 Five-port 1 2,4 3,5 12, 14 ;12& 5/3 Five-port b 3,5 2,4 1 12, 14 (Optional dual pressure) The first number refers to the number of main ports and the second to the number of valve positions. For ample, a 2/2 valve is a two-main-port, two-position valve, and a 4/3 valve is a four-main-port, three-position Ive. The term “way”has also been used indescriptions of valves, and expressions such as “three-way valves” d “four-way valves” have been common. Confusion can arise with four-way, four-pori and four-way, five-port Ives, each with two or three positions. Because of this, the use of the term “way”in descriptions of valves is “onglydiscouraged. The optional arrangement is id entified either from the graphic symbol or from instructions included with the Ive’s packaging. 5.2.1 Electrical leads shall be identified by one of the following means, according to the examples in Figure 1 a), b) and c) below (other combinations are also possible): a) visual observation of solenoid leads directly connected to the control mechanism (no marking or colour code required); b) colour-coded electrical wiring at the field connection, with instructions directly on the valve, identifying the control mechanism associated with the colour code; c) markings on the terminal block or on the electrical wiring, using the identification numbers described in Table 1, identifying the control mechanism associated with the markings. 4 IS 15331 :2003 ISO 11727:1999 r=’=--l Colour A Co[our A Colour B Co[our B JEIL E Valve 12 Valve m a) b) c) Figure 1— Examples of identification of electrical leads 5.2.2 Control mechanisms need not be marked but should be identifiable from instructional material or from the label attached to the valve. If a label uses a graphic symbol to identify the control mechanisms, the symbol should be oriented to correspond with the control mechanisms’ locations. Control mechanisms may also be identified by association with the pilot control port near them. 5.3 Manifold port identifications 5.3.1 Sections of a manifold or manifold assembly shall use the same identifications as described in Table 1 for those main ports, pilot control ports, control mechanisms and solenoid/electrical leads that are externally connected in sections of a manifold or manifold assembly. See Figure 2. Key 1) Port markings on manifold end if no end plate is used 2) Section of a manifold (with one piece base) or a manifold assembly (with individual bases), which includes valve, control mechanism and base 3) Port markings on end plate ifused on manifold assembly (optional, dual marking shown) Figure 2 — Example of identificatio n on a manifold or manifold assembly 5