Standard No.:	MT 419-1995
English Name:	Valve Used for Hydraulic Support
Chinese Name:	液压支架用阀
Chinese Classification:	D9
Professional Classification:	MT    Professional Standard - Coal
Issued by:	Ministry of Coal Industry of the People's Republic of China
Issued on:	1995-12-5
Implemented on:	2003-3-1
Status:	valid
Superseding:	MT 119-1985
Language:	English
File Format:	PDF
Word Count:	9000 words
Price(USD):	220.0
Delivery:	via email in 1 business day

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