GB/T 786.1-2021 English PDFUS$2774.00 · In stock
Delivery: <= 12 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 786.1-2021: Fluid power systems and components - Graphical symbols and circuit diagrams - Part 1: Graphical symbols Status: Valid GB/T 786.1: Historical versions
Basic dataStandard ID: GB/T 786.1-2021 (GB/T786.1-2021)Description (Translated English): Fluid power systems and components - Graphical symbols and circuit diagrams - Part 1: Graphical symbols Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J20 Word Count Estimation: 146,181 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 786.1-2021: Fluid power systems and components - Graphical symbols and circuit diagrams - Part 1: Graphical symbols---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Fluid power systems and components-Graphical symbols and circuit diagrams-Part 1.Graphical symbols ICS 23.100.01;01.080.30 J20 National Standards of People's Republic of China Replace GB/T 786.1-2009 Graphical symbols for fluid transmission systems and components and Circuit Diagram Part 1.Graphical Symbols (ISO 1219-1.2012, Fluidpowersystemsandcomponents- Released on 2021-05-21 and implemented on 2021-12-01 State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee Table of contentsForeword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Marking instructions (quote this part of GB/T 786) 1 5 General 1 6 Hydraulic application example 2 6.1 Valve 2 6.2 Pumps and motors 34 6.3 Cylinder 40 6.4 Annex 44 7 Pneumatic application example 56 7.1 Valve 56 7.2 Air compressor and motor 72 7.3 Cylinder 74 7.4 Accessories 79 8 Basic elements of graphic symbols 91 8.1 Line 91 8.2 Connections and pipe joints 91 8.3 Indication of flow path and direction 93 8.4 Basic elements of machinery 96 8.5 Elements of control mechanism 106 8.6 Adjustment elements 110 8.7 Accessories 112 9 Application Rules 118 9.1 General symbols 118 9.2 Valve 119 9.3 Two-way cover plate cartridge valve 123 9.4 Pumps and motors 125 9.5 Cylinder 126 9.6 Accessories 127 Appendix A (informative appendix) Introduction to CAD symbols 131 References 138ForewordGB/T 786 "Fluid Transmission System and Components Graphic Symbols and Circuit Diagrams" is divided into three parts. ---Part 1.Graphical symbols; ---Part 2.Circuit diagram; ---Part 3.Symbol modules and connection symbols in the circuit diagram. This part is Part 1 of GB/T 786. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 786.1-2009 "Fluid transmission systems and components graphical symbols and circuit diagrams-Part 1.For general use Compared with GB/T 786.1-2009, the main technical changes except for editorial changes are as follows. --- Modified "non-working state" to "initial state" (see 5.4, 5.4 of the.2009 edition); --- Deleted the "electrically operated pneumatic pilot control mechanism" example (see 6.1.1.14 in the.2009 edition); ---Modified the two forward arrows in the non-initial function position of the two-position four-way directional control valve to two cross arrows (see 6.1.2.13,.2009 6.1.2.13 of the year version); ---Modified the two-way arrow in the two-position three-way directional control valve to a one-way arrow, and the direction of the one-way valve was changed (See 6.1.2.17, 6.1.2.17 of the.2009 edition); --- Deleted one example of "Proportional directional control valve, direct control" (see 6.1.6.2 of the.2009 edition); --- Deleted the leaking fuel tank in the control element of the servo valve example (see 6.1.6.4 of the.2009 edition); ---Modified the stepper motor drive symbol (see 6.1.6.6, 6.1.6.6 of the.2009 edition); ---The leaking fuel tank with the graphic symbol of the three-way proportional pressure reducing valve has been added (see 6.1.7.5); ---Modified the two control elements of the proportional relief valve, arranged them separately, and placed the additional pilot stage in the upper right corner of the function position, with electronic The pilot stage of the magic weapon is placed below the right side of the function position (see 6.1.7.6, 6.1.7.6 in the.2009 version); ---Deleted the import and export extension line of the non-initial function position of the graphic symbol (see 6.1.8.1 and 7.1.8.1 of the.2009 edition); ---Modified the pressure reducing cartridge valve plug-in (spool valve structure, normally closed, with integrated check valve) The dotted line of port A is a solid line (see 6.1.9.11, 6.1.9.11 of the.2009 version); ---Added the X port extension line (dotted line) of the control cover with pilot port (see 6.1.9.14 and 6.1.9.15); ---The dashed line in the shuttle valve is modified as a solid line (see 6.1.9.17, 6.1.9.18 and 6.1.9.19, the.2009 version of 6.1.9.17, 6.1.9.18 And 6.1.9.19); ---The solid line of the reversing valve port is modified as a dashed line (see 6.1.9.24, 6.1.9.25 and 6.1.9.27, the.2009 version of 6.1.9.24, 6.1.9.25 and 6.1.9.27); ---Modified the two-way cartridge valve (with pressure reducing function, low pressure control) in the solid line connection of A and B ports to be disconnected (see 6.1.9.30,.2009 6.1.9.30 of the year version); ---The solid line of the pilot control pipeline of the graphic symbol in the application example is modified as a dashed line (see 7.1.2.19, 7.1.2.20, 7.1.2.22 7.1.2.23, 7.1.3.4, 7.1.2.19, 7.1.2.20, 7.1.2.22, 7.1.2.23, 7.1.3.4 of the.2009 version); ---The dotted line of the pilot control port of the air pressure reset is modified as a dotted line (see 7.1.1.9, 7.1.1.9 of the.2009 edition); ---The solid line of the external pressure source of the air pressure reset is modified as a dashed line (see 7.1.1.10, 7.1.1.10 of the.2009 edition); ---The solid line of the internal control line is modified as a dashed line (see 7.1.2.5, 7.1.2.10 and 7.1.2.11, 7.1.2.5, 7.1.2.10 of the.2009 edition And 7.1.2.11); ---The example of median function is deleted (see 7.1.2.15 and 7.1.2.21 of the.2009 edition); ---Added a solid hollow triangle sign indicating the source of air pressure at the entrance and exit (see 7.2.1 and 7.2.2); --- Deleted the "anti-cavitation relief valve used to protect the two supply pipelines" example (see 7.1.3.5 of the.2009 edition); --- Added two new application examples (see 7.3.21 and 7.3.22); ---Modified the drawing method of the entry and exit lines of the graphical symbol of the "differential pressure gauge". 7.4.3.5, 7.4.3.5 of the.2009 version); ---Modified the graphical symbol drainage line of "manual drainage separator", and changed the solid line to a dashed line (see 7.4.4.19,.2009 edition 7.4.4.19); ---The angle and size of the arrow indicating the "flow path" in the "indication of flow path and direction" have been added (see 8.3); ---Modified the size of "diaphragm, capsule" from 5M to 2.5M (see 8.4.29, 8.4.29 in the.2009 edition); --- Added two new basic element symbols (see 8.4.63 and 8.4.64); ---Modified the graphic symbol of "air pressure boost brake mechanism", which indicates that the solid line of the pilot control air source is a dashed line (see 8.5.29,.2009) Version 8.5.29); ---Added an example of indicating application instructions (see 8.5.30, 8.5.31 and 8.5.32); ---The angle and size of the arrow indicating "adjustable" in the "adjustment element" have been added (see 8.6); ---Added the "Electrical Digital Output Signal" to represent the digital signal Points. Graphical Symbols for General Purposes and Data Processing Applications. The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows. ---GB/T 4457.2-2003 Technical drawing, the basic provisions of the drawing method guideline and datum line (ISO 128-22.1999, IDT) ---GB/T 4457.4-2002 Mechanical drawing drawing method drawing line (ISO 128-24.1999, MOD) ---GB/T 4458.1-2002 mechanical drawing drawing method view (ISO 128-34.2001, MOD) ---GB/T 4458.6-2002 Mechanical Drawing Drawing Method Sectional View and Sectional View (ISO 128-44.2000, MOD) ---GB/T 16901.1-2008 Graphical symbols for technical documents Part 1.Basic rules (ISO 81714-1. 1999, MOD) ---GB/T 16901.2-2013 Graphical symbols representation rules for technical documents Part 2.Graphical symbols (including reference symbols Graphical symbols in the library) computer electronic file format specification and its exchange requirements (IEC 81714-2.2006, MOD) ---GB/T 17446-2012 Fluid Power System and Components Vocabulary (ISO 5598.2008, IDT) ---GB/T 17450-1998 technical drawing line (idtISO 128-20.1996) ---GB/T 17453-2005 Technical drawing, drawing method, representation of section area (ISO 128-50.2001, IDT) ---GB/T 18594-2001 Technical product document font Latin letters, numbers and symbols CAD fonts (ISO 3098-5. 1997, IDT) ---GB/T 18686-2002 Technical drawing CAD system with graphical representation (ISO 128-21.1997, IDT) ---GB/T 20063 (all parts) Graphical symbols for diagrams [ISO 14617 (all parts)] This section has made the following editorial changes. ---Incorporated the amendments of ISO 1219-1.2012/Amd.1.2016, and the outer margins of the clauses involved use vertical The straight double line (‖) is marked; ---Modified the standard name. This part was proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (SAC/TC3). Drafting organizations of this section. Yanshan University, Youweili Hydraulic Technology Co., Ltd., Wuhan University of Science and Technology, Beijing Huade Hydraulic Industry Group Co., Ltd., Shandong University of Technology, Guangdong Shaoguan City Quality and Metrology Supervision and Inspection Institute, Beihang University, Qinhuangdao Yanda Yihua Mechanical and Electrical Engineering Technology Research Institute Co., Ltd., Liaoning Donggang Hongda Hydraulic Cylinder Remanufacturing Co., Ltd., Beijing Machinery Industry Automation Research Co., Ltd. Limited company. The main drafters of this section. Cai Wei, Zhao Jingyi, Lin Guang, Chen Xinyuan, Zhao Jingbo, Xu Tongle, Zhao Shangyu, Shi Yan, Guo Rui, Tang Yingda, Cao Qiaohui. The previous releases of the standards replaced by this part are as follows. ---GB 786-1965, GB 786-1976, GB/T 786.1-1993, GB/T 786.1-2009. Graphical symbols for fluid transmission systems and components and Circuit Diagram Part 1.Graphical Symbols1 ScopeThis part of GB/T 786 establishes the basic elements of various symbols and specifies the design of fluid transmission components and symbols in circuit diagrams. rule. This part is a comprehensive application of the ISO 14617 series of standards. The symbols in this section are designed according to a fixed size for direct use in data The processing system may lead to different variants.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. ISO 128 (all parts) General principles of technical drawing representation (Technicaldrawings-Generalprinciplesof presentation) ISO 3098-5 Technical product document fonts Part 5.Computer-aided design fonts for Latin letters, numbers and signs (Technicalproductdocumentation-Lettering-Part 5.CADletteringoftheLatinalphabet,numerals andmarks) ISO 5598 Fluidpower systems and components-Vocabulary (Fluidpowersystemsandcomponents-Vocabulary) ISO 14617 (all parts) Graphical symbols for diagrams (Graphicalsymbolsfordiagrams) ISO 81714-1 Design of Graphical Symbols Used in Product Technical Documents Part 1.Basic Rules (Design of Graphical symbolsforuseintechnicaldocumentationofproducts-Part 1.Basicrules) IEC 81714-2 Design of Graphical Symbols Used in Technical Documents of Products Part 2.Calculations including Graphical Symbols for Reference Library Computer perceivable graphical symbol specification and its exchange requirements (Designofgraphicalsymbolsforuseinthetechnicaldocumen- tationofproducts-Part 2.Specificationforgraphicalsymbolsinacomputersensibleformincluding graphicalsymbolsforareferencelibrary,andrequirementsfortheirinterchange)3 Terms and definitionsThe terms and definitions defined in ISO 5598 apply to this document. 4 Marking instructions (quote this part of GB/T 786) When deciding to comply with this part of GB/T 786, use the following instructions in test reports, product samples and commercial documents. "Graphical symbols5 General5.1 Use the basic elements and rules specified in this section to create component symbols. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 786.1-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 786.1-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 8 ~ 12 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 786.1-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 786.1-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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