GB/T 786.3-2021Fluid power systems and components - Graphical symbols and circuit diagrams - Part 3: Symbol modules and connected symbols in circuit diagrams (English PDF)
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
May 21, 2021
Implementation date
December 1, 2021
Scope
GB/T 786.3-2021 (Fluid power systems and components - Graphical symbols and circuit diagrams - Part 3: Symbol modules and connected symbols in circuit diagrams) is available as an English-translated PDF.
GB/T 786.3-2021 is the Chinese standard "Fluid power systems and components - Graphical symbols and circuit diagrams - Part 3: Symbol modules and connected symbols in circuit diagrams".
Its scope clause reads: This document supplements GB/T 786.1 and GB/T 786.2, and specifies the creation and combination of connectable component symbols in circuit diagrams The rules to reduce the design workload and the number of pipelines in the circuit diagram.
This document specifies the rules for the creation and combination of symbols corresponding to the modules that constitute functional units, such as oil circuit block assemblies or superimposed valves Valve group or gas source processing device (FRL device).
The rules of this document are not only conducive to the design of circuit diagrams, but also conducive to understanding the use of symbolic models. The block represents the circuit diagram of the combined component.
This document contains examples of the application of the corresponding rules. Note. Typical application examples that comply with the rules of this document are given in the appendix.
Table 1 summarizes the typical application of the rules of this document in each appendix example. Its clauses include terms and definitions.
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Document preview — GB/T 786.3-2021
National Standard of the People's Republic of China
- Classification
- J 20
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Rules for creating symbolic modules
- 4.1 Outer frame line width
- 4.2 Frame size
- 4.3 The distance between the outer frame and the line
- 4.4 Symbol module direction
- 4.5 Representation of closed pipeline
- 5 Application rules of symbol modules in loop diagram
- 5.1 Typical Layout of Symbol Module
- 5.2 Connection of Symbol Module
- 5.3 Spacing of symbol modules
- 5.4 Frame 4 of the connected symbol module
- 5.5 Decomposition of Symbolic Module
- 5.6 Expansion of Symbol Module
- 5.7 Positioning and alignment of connected symbol modules
- 5.8 The name of the connection point of the symbolic module interface
- 6 Example of a circuit diagram with symbolic blocks
- 7 Marking description
- Appendix B (informative) Hydraulic circuit diagram example
- Appendix C (informative) Pneumatic circuit diagram example
- Appendix D (informative) Example of pneumatic circuit diagram
1 Scope
This document supplements GB/T 786.1 and GB/T 786.2, and specifies the creation and combination of connectable component symbols in circuit diagrams
The rules to reduce the design workload and the number of pipelines in the circuit diagram.
This document specifies the rules for the creation and combination of symbols corresponding to the modules that constitute functional units, such as oil circuit block assemblies or superimposed valves
Valve group or gas source processing device (FRL device). The rules of this document are not only conducive to the design of circuit diagrams, but also conducive to understanding the use of symbolic models.
The block represents the circuit diagram of the combined component.
This document contains examples of the application of the corresponding rules.
Note. Typical application examples that comply with the rules of this document are given in the appendix. Table 1 summarizes the typical application of the rules of this document in each appendix example.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
ISO 1219-1 Graphical symbols and circuit diagrams of fluid power systems and components-Part 1.For general use and data processing applications
Graphical symbols used (Fluidpowersystemsandcomponents-Graphicalsymbolsandcircuitdiagrams-
Part 1.Graphicalsymbolsforconventionaluseanddata-processingapplications)
Note. GB/T 786.1-2021 Graphical symbols and circuit diagrams of fluid power transmission systems and components Part 1.Graphical symbols (ISO 1219-1.2012, IDT)
ISO 1219-2 Graphical symbols and circuit diagrams of fluid power systems and components-Part 2.Circuit diagrams (Fluidpowersystems andcomponents-Graphicalsymbolsandcircuitdiagrams-Part 2.Circuitdiagrams)
Note. GB/T 786.2-2018 Graphical symbols and circuit diagrams of fluid transmission systems and components Part 2.Circuit diagrams (ISO 1219-2.2012, MOD)
ISO 5598 Fluidpower systems and components-Vocabulary (Fluidpowersystemsandcomponents-Vocabulary)
Note. GB/T 17446-2012 Fluid Power System and Components Vocabulary (ISO 5598.2008, IDT)
3 Terms and definitions
The following terms and definitions defined in ISO 5598 apply to this document.
3.1 Symbolmodules
Comply with the modules (such as backplane modules) constituted by the symbols, lines, frames and connection points specified by ISO 1219-1 (the symbol modules can be
The same interfaces are connected to each other, see Figure 1). […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 786.1-2021Fluid power systems and components - Graphical symbols and circuit diagrams - Part 1: Graphical symbols
- GB/T 786.2-2018Fluid power systems and components -- Graphical symbols and circuit diagrams -- Part 2: Circuit diagrams
- GB/T 17446-2012Fluid power systems and components - Vocabulary
ISO 1219 · ISO 5598 · ISO 5598.2008
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Related Standards
GB/T 786.1-2021 — Fluid power systems and components - Graphical symbols and circuit diagrams - Part 1: Graphical symbols
GB/T 786.2-2018 — Fluid power systems and components -- Graphical symbols and circuit diagrams -- Part 2: Circuit diagrams
GB/T 7251.4-2026 — Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)
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GB/T 786.3-2021
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