1 Subject Content and Application Scope
The standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of hydraulic support valve (hereafter referred as valve) for mining.
The standard is applicable to hydraulic support valve for mining.
2 Normative references
GB 197 General Purpose Screw Threads - Tolerances and Fits (diameter: 1~355mm)
GB 321 Preferred Numbers and Preferred Number Series
GB 699 Quality Carbon Structural Steels - Technical Requirements
GB 1184 Geometrical Tolerancing - Geometrical Tolerance for Features without Individual Tolerance Indications
GB 1220 Stainless Steel Bars
GB 1239.1~1239.5 Ordinary Cylindrical Helical Springs
GB/T 1804 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications
GB/T 2878 Fluid Power Systems and Components - Ports - Dimensions and Design
GB 3452.1 Fluid Systems - Sealing Devices - O-rings - Inside Diameters, Cross-sections, Tolerances and Size Identification Code
GB 3452.2 Appearance Quality Acceptance Criteria for Rubber O-rings
GB 3452.3 Fluid Power Systems - O-ring - Design Criteria for O-ring Housing - Basic Calculation
GB 9439 Grey Iron Castings
GB 11352 Cast Carbon Steels for General Engineering Purposes
GB/T 13306 Plates
GB 13319 Geometrical Tolerance - Positional Tolerancing
JB 3338 Cylindrical Helical Compression Springs for Hydraulic Parts - Technical Conditions
MT 76 Emulsion Oil for Hydraulic Support
MT/T 154.1 Model Compilation and Management of Electromechanical Product for Coal mine
3 Terms
1 Subject Content and Application Scope
2 Normative references
3 Terms
4 Product Classification
5 Technical Requirements
6 Performance Requirement and Test Methods
7 Inspection Rules
8 Inspection Report
9 Marking, Packaging and Storage
Appendix A Technical Requirements for Electroplated Coatings of Valve Parts (Supplement)
Appendix B Requirements for Plastic Product (Supplement)
Additional Information
